Merge pull request #119 from Shuobatian/master

add n21 n58

README.md

@@ -29,6 +29,8 @@ AT device 软件包是由 RT-Thread AT 组件针对不同 AT 设备的移植文
 | class/m6315 | m6315 设备针对 AT 组件的移植目录，实现 AT Socket 功能 |
 | class/bc28 | bc28 设备针对 AT 组件的移植目录，实现 AT Socket 功能 |
 | class/ec200x | EC200T、EC200S 设备针对 AT 组件的移植目录，实现 AT Socket 功能 |
+| class/n21 | N21 设备针对 AT 组件的移植目录，实现 AT Socket 功能 |
+| class/n58 | N58 设备针对 AT 组件的移植目录，实现 AT Socket 功能 |
 ### 1.2 许可证 ###
 
 at_device package 遵循 LGPLv2.1 许可，详见 `LICENSE` 文件。
@@ -111,6 +113,8 @@ RT-Thread online packages  --->
         [ ]   ChinaMobile M6315  --->
         [ ]   Quectel BC28  --->
         [ ]   Quectel ec200x  --->
+        [ ]   Neoway N21  --->
+        [ ]   Neoway N58  --->
         Version (latest)  --->
 ```
 
@@ -142,6 +146,8 @@ RT-Thread online packages  --->
 - **ChinaMobile M6315**：开启 M6315 （2G 模块）设备支持；
 - **Quectel BC28**：开启 BC28（NB-IoT 模块）设备支持；
 - **Quectel EC200X**：开启 EC200T、EC200S（4G 模块）设备支持；
+- **Neoway N21**：开启 N21（NB-IoT 模块）设备支持；
+- **Neoway N58**：开启 N58（4G 模块）设备支持；
 - **Version** 下载软件包版本；
 
 上面配置选项以 2G 模块和 WIFI 模块选项为例，介绍了`V2.X.X` 版本 AT device 软件包配置方式，如下几点值得注意：

SConscript

@@ -147,6 +147,24 @@ if GetDepend(['AT_DEVICE_USING_EC200X']):
         src += Glob('class/ec200x/at_socket_ec200x.c')
     if GetDepend(['AT_DEVICE_EC200X_SAMPLE']):
         src += Glob('samples/at_sample_ec200x.c')
+
+# N21
+if GetDepend(['AT_DEVICE_USING_N21']):
+    path += [cwd + '/class/n21']
+    src += Glob('class/n21/at_device_n21.c')
+    if GetDepend(['AT_USING_SOCKET']):
+        src += Glob('class/n21/at_socket_n21.c')
+    if GetDepend(['AT_DEVICE_N21_SAMPLE']):
+        src += Glob('samples/at_sample_n21.c')
+
+# N58
+if GetDepend(['AT_DEVICE_USING_N58']):
+    path += [cwd + '/class/n58']
+    src += Glob('class/n58/at_device_n58.c')
+    if GetDepend(['AT_USING_SOCKET']):
+        src += Glob('class/n58/at_socket_n58.c')
+    if GetDepend(['AT_DEVICE_N58_SAMPLE']):
+        src += Glob('samples/at_sample_n58.c')
         
 group = DefineGroup('at_device', src, depend = ['PKG_USING_AT_DEVICE'], CPPPATH = path)
 

class/n21/Kconfig

@@ -0,0 +1,37 @@
+
+# N21 AT device configuration
+menuconfig AT_DEVICE_USING_N21
+    bool "neoway N21"
+    default n
+
+if AT_DEVICE_USING_N21
+
+    config AT_DEVICE_N21_INIT_ASYN
+        bool "Enable initialize by thread"
+        default n
+
+    config AT_DEVICE_N21_SAMPLE
+        bool "Enable sample"
+        default y
+
+    if AT_DEVICE_N21_SAMPLE
+
+       config N21_SAMPLE_POWER_PIN
+            int "Power pin"
+            default -1
+
+        config N21_SAMPLE_STATUS_PIN
+            int "Power status pin"
+            default -1
+
+        config N21_SAMPLE_CLIENT_NAME
+            string "AT client device name"
+            default "uart3"
+
+        config N21_SAMPLE_RECV_BUFF_LEN
+            int "The maximum length of receive line buffer"
+            default 512
+
+    endif
+
+endif

class/n21/at_device_n21.c

@@ -0,0 +1,917 @@
+/*
+ * File      : at_socket_n21.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2020, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-05-22     shuobatian     first version
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <at_device_n21.h>
+
+#if !defined(AT_SW_VERSION_NUM) || AT_SW_VERSION_NUM < 0x10300
+#error "This AT Client version is older, please check and update latest AT Client!"
+#endif
+
+#define LOG_TAG "at.dev"
+#include <at_log.h>
+
+#ifdef AT_DEVICE_USING_N21
+
+#define N21_WAIT_CONNECT_TIME 10000
+#define N21_THREAD_STACK_SIZE 2048
+#define N21_THREAD_PRIORITY (RT_THREAD_PRIORITY_MAX / 2)
+// #define N21_THREAD_PRIORITY 6
+
+static void n21_power_on(struct at_device *device)
+{
+
+    struct at_device_n21 *n21 = RT_NULL;
+
+    n21 = (struct at_device_n21 *)device->user_data;
+
+    /* not nead to set pin configuration for n21 device power on */
+#if (N21_SAMPLE_POWER_PIN != -1)
+#if (N21_SAMPLE_STATUS_PIN != -1)
+    if (n21->power_pin == -1 || n21->power_status_pin == -1)
+    {
+        return;
+    }
+
+    if (rt_pin_read(n21->power_status_pin) == PIN_HIGH)
+    {
+        return;
+    }
+    rt_pin_write(n21->power_pin, PIN_HIGH);
+    while (rt_pin_read(n21->power_status_pin) == PIN_LOW)
+    {
+        rt_thread_mdelay(10);
+    }
+    rt_pin_write(n21->power_pin, PIN_LOW);
+#else
+    if (n21->power_pin == -1)
+    {
+        return;
+    }
+    rt_pin_write(n21->power_pin, PIN_HIGH);
+
+#endif
+#endif
+}
+
+static void n21_power_off(struct at_device *device)
+{
+    struct at_device_n21 *n21 = RT_NULL;
+
+    n21 = (struct at_device_n21 *)device->user_data;
+
+#if (N21_SAMPLE_POWER_PIN != -1)
+#if (N21_SAMPLE_STATUS_PIN != -1)
+    /* not nead to set pin configuration for m26 device power on */
+    if (n21->power_pin == -1 || n21->power_status_pin == -1)
+    {
+        return;
+    }
+    if (rt_pin_read(n21->power_status_pin) == PIN_LOW)
+    {
+        return;
+    }
+
+    rt_pin_write(n21->power_pin, PIN_HIGH);
+    while (rt_pin_read(n21->power_status_pin) == PIN_HIGH)
+    {
+        rt_thread_mdelay(10);
+    }
+    rt_pin_write(n21->power_pin, PIN_LOW);
+#else
+    if (n21->power_pin == -1)
+    {
+        return;
+    }
+    rt_pin_write(n21->power_pin, PIN_LOW);
+#endif
+#endif
+}
+
+/* =============================  neoway n21 network interface operations ============================= */
+
+/* set n21 network interface device status and address information */
+static int n21_netdev_set_info(struct netdev *netdev)
+{
+#define N21_SET_INFO_RESP_SIZE 128
+#define N21_INFO_RESP_TIMO rt_tick_from_millisecond(300)
+
+    int result = RT_EOK;
+    //    int at_result = 0;
+    ip_addr_t addr;
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+
+    if (netdev == RT_NULL)
+    {
+        LOG_E("input network interface device is NULL.");
+        return -RT_ERROR;
+    }
+    LOG_D("netdev set info");
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n21 device by netdev name(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    /* set network interface device status */
+    netdev_low_level_set_status(netdev, RT_TRUE);
+    netdev_low_level_set_link_status(netdev, RT_TRUE);
+    netdev_low_level_set_dhcp_status(netdev, RT_TRUE);
+
+    resp = at_create_resp(N21_SET_INFO_RESP_SIZE, 0, N21_INFO_RESP_TIMO);
+    if (resp == RT_NULL)
+    {
+        LOG_E("n21 device(%s) set IP address failed, no memory for response object.", device->name);
+        result = -RT_ENOMEM;
+        goto __exit;
+    }
+
+    /* set network interface device hardware address(IEMI) */
+    {
+#define N21_NETDEV_HWADDR_LEN 8
+#define N21_IEMI_LEN 15
+
+        char iemi[N21_IEMI_LEN] = {0};
+        int i = 0, j = 0;
+
+        /* send "AT+GSN" commond to get device IEMI */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CGSN") < 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        if (at_resp_parse_line_args_by_kw(resp, "+CGSN:", "+CGSN: %s", iemi) <= 0)
+        {
+            LOG_E("n21 device(%s) IEMI get fail", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        netdev->hwaddr_len = N21_NETDEV_HWADDR_LEN;
+        /* get hardware address by IEMI */
+        for (i = 0, j = 0; i < N21_NETDEV_HWADDR_LEN && j < N21_IEMI_LEN; i++, j += 2)
+        {
+            if (j != N21_IEMI_LEN - 1)
+            {
+                netdev->hwaddr[i] = (iemi[j] - '0') * 10 + (iemi[j + 1] - '0');
+            }
+            else
+            {
+                netdev->hwaddr[i] = (iemi[j] - '0');
+            }
+        }
+
+        LOG_D("hwaddr:%.2X-%.2X-%.2X-%.2X-%.2X-%.2X-%.2X-%.2X,IEMI:%s", netdev->hwaddr[0],
+              netdev->hwaddr[1], netdev->hwaddr[2], netdev->hwaddr[3], netdev->hwaddr[4],
+              netdev->hwaddr[5], netdev->hwaddr[6], netdev->hwaddr[7], iemi);
+    }
+    LOG_D("get IP address");
+    /* get network interface device IP address */
+    {
+#define IP_ADDR_SIZE_MAX 32
+        char ipaddr[IP_ADDR_SIZE_MAX] = {0};
+
+        /* send "AT+XIIC?" commond to get IP address */
+        if (at_obj_exec_cmd(device->client, resp, "AT+XIIC?") < 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        if (at_resp_parse_line_args_by_kw(resp, "+XIIC:    ", "+XIIC:%*[^,],%s", ipaddr) <= 0)
+        {
+            LOG_E("n21 device(%s) prase \"AT+XIIC?\" commands resposne data error!", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        LOG_I("n21 device(%s) IP address: %s", device->name, ipaddr);
+
+        /* set network interface address information */
+        inet_aton(ipaddr, &addr);
+        netdev_low_level_set_ipaddr(netdev, &addr);
+    }
+    //n21 not support inquire dns
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+static void check_link_status_entry(void *parameter)
+{
+#define N21_LINK_STATUS_OK 1
+#define N21_LINK_RESP_SIZE 64
+#define N21_LINK_RESP_TIMO (3 * RT_TICK_PER_SECOND)
+#define N21_LINK_DELAY_TIME (30 * RT_TICK_PER_SECOND)
+
+    at_response_t resp = RT_NULL;
+    int result_code, link_status;
+    struct at_device *device = RT_NULL;
+#if (N21_SAMPLE_STATUS_PIN != -1)
+    struct at_device_n21 *n21 = RT_NULL;
+#endif
+
+    char parsed_data[10] = {0};
+    struct netdev *netdev = (struct netdev *)parameter;
+
+    LOG_D("statrt n21 device(%s) link status check \n");
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n21 device by netdev name(%s) failed.", netdev->name);
+        return;
+    }
+#if (N21_SAMPLE_STATUS_PIN != -1)
+    n21 = (struct at_device_n21 *)device->user_data;
+#endif
+    resp = at_create_resp(N21_LINK_RESP_SIZE, 0, N21_LINK_RESP_TIMO);
+    if (resp == RT_NULL)
+    {
+        LOG_E("n21 device(%s) set check link status failed, no memory for response object.", device->name);
+        return;
+    }
+
+    while (1)
+    {
+        /* send "AT+CEREG?" commond  to check netweork interface device link status */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CEREG?") < 0)
+        {
+            rt_thread_mdelay(N21_LINK_DELAY_TIME);
+            LOG_E("n21 device(%s) send cgreg failed", device->name);
+            continue;
+        }
+
+        link_status = -1;
+        at_resp_parse_line_args_by_kw(resp, "+CEREG:", "+CEREG: %d,%d\r\n", &result_code, &link_status);
+
+        /* check the network interface device link status  */
+        if ((N21_LINK_STATUS_OK == link_status) != netdev_is_link_up(netdev))
+        {
+
+            netdev_low_level_set_link_status(netdev, (N21_LINK_STATUS_OK == link_status));
+        }
+
+#if (N21_SAMPLE_STATUS_PIN != -1)
+        if (rt_pin_read(n21->power_status_pin) == PIN_HIGH) //check the module_status , if moduble_status is Low, user can do your logic here
+        {
+#endif
+            if (at_obj_exec_cmd(device->client, resp, "AT+CSQ") == 0)
+            {
+                at_resp_parse_line_args_by_kw(resp, "+CSQ:", "+CSQ: %s", &parsed_data);
+                if (strncmp(parsed_data, "99,99", sizeof(parsed_data)))
+                {
+                    LOG_W("n21 device(%s) signal strength: %s", device->name, parsed_data);
+                }
+            }
+#if (N21_SAMPLE_STATUS_PIN != -1)
+        }
+        else
+        {
+            LOG_E("netdev name(%s) status pin is low", device->name);
+            netdev_low_level_set_link_status(netdev, RT_FALSE);
+            return;
+        }
+#endif
+        rt_thread_mdelay(N21_LINK_DELAY_TIME);
+    }
+}
+
+static int n21_netdev_check_link_status(struct netdev *netdev)
+{
+
+#define N21_LINK_THREAD_TICK 20
+#define N21_LINK_THREAD_STACK_SIZE 1024
+#define N21_LINK_THREAD_PRIORITY (RT_THREAD_PRIORITY_MAX - 22)
+
+    rt_thread_t tid;
+    char tname[RT_NAME_MAX] = {0};
+
+    if (netdev == RT_NULL)
+    {
+        LOG_E("input network interface device is NULL.\n");
+        return -RT_ERROR;
+    }
+
+    rt_snprintf(tname, RT_NAME_MAX, "%s_link", netdev->name);
+
+    tid = rt_thread_create(tname, check_link_status_entry, (void *)netdev,
+                           N21_LINK_THREAD_STACK_SIZE, N21_LINK_THREAD_PRIORITY, N21_LINK_THREAD_TICK);
+    if (tid)
+    {
+        rt_thread_startup(tid);
+    }
+
+    return RT_EOK;
+}
+
+static int n21_net_init(struct at_device *device);
+
+static int n21_netdev_set_up(struct netdev *netdev)
+{
+    struct at_device *device = RT_NULL;
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n21 device by netdev name(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    if (device->is_init == RT_FALSE)
+    {
+        n21_net_init(device);
+        device->is_init = RT_TRUE;
+
+        netdev_low_level_set_status(netdev, RT_TRUE);
+        LOG_D("the network interface device(%s) set up status.", netdev->name);
+    }
+
+    return RT_EOK;
+}
+
+static int n21_netdev_set_down(struct netdev *netdev)
+{
+    struct at_device *device = RT_NULL;
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n21 device by netdev name(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    if (device->is_init == RT_TRUE)
+    {
+        n21_power_off(device);
+        device->is_init = RT_FALSE;
+
+        netdev_low_level_set_status(netdev, RT_FALSE);
+        LOG_D("the network interface device(%s) set down status.", netdev->name);
+    }
+
+    return RT_EOK;
+}
+
+#ifdef NETDEV_USING_PING
+static int n21_netdev_ping(struct netdev *netdev, const char *host,
+                           size_t data_len, uint32_t timeout, struct netdev_ping_resp *ping_resp)
+{
+#define N21_PING_RESP_SIZE 512
+#define N21_PING_IP_SIZE 16
+#define N21_PING_TIMEO (5 * RT_TICK_PER_SECOND)
+
+#define N21_PING_ERR_TIME 600
+#define N21_PING_ERR_TTL 255
+
+    int result = RT_EOK;
+    int bytes, time, ttl, i;
+    char ip_addr[N21_PING_IP_SIZE] = {0};
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+
+    RT_ASSERT(netdev);
+    RT_ASSERT(host);
+    RT_ASSERT(ping_resp);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n21 device by netdev name(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    for (i = 0; i < rt_strlen(host) && !isalpha(host[i]); i++)
+        ;
+
+    resp = at_create_resp(N21_PING_RESP_SIZE, 7, N21_PING_TIMEO);
+    if (resp == RT_NULL)
+    {
+        LOG_E("n21 device(%s) set dns server failed, no memory for response object.", device->name);
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    /* send "AT+PING=<ip>[,<timeout>,<size>,<num>]" commond to send ping request */
+    /* n21 ping <size> ranges of ipv4(36-1500), ipv6(56-1500) */
+    if (at_obj_exec_cmd(device->client, resp, "AT+PING=%s,%d,%d,1",
+                        host, N21_PING_TIMEO / (RT_TICK_PER_SECOND / 10), data_len + 4) < 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+    //Reply from 39.156.69.79: bytes= 36 time = 148(ms), TTL = 255
+    //Reply from %[^:]: bytes= %d time = %d(ms), TTL = %d
+    if (at_resp_parse_line_args_by_kw(resp, "Reply from ", "Reply from %[^:]: bytes= %d time = %d(ms), TTL = %d",
+                                      ip_addr, &bytes, &time, &ttl) <= 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    /* the ping request timeout expires, the response time settting to 600 and ttl setting to 255 */
+    if (time == N21_PING_ERR_TIME && ttl == N21_PING_ERR_TTL)
+    {
+        result = -RT_ETIMEOUT;
+        goto __exit;
+    }
+
+    inet_aton(ip_addr, &(ping_resp->ip_addr));
+    ping_resp->data_len = data_len;
+    ping_resp->ticks = time;
+    ping_resp->ttl = ttl;
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+#endif /* NETDEV_USING_PING */
+
+#ifdef NETDEV_USING_NETSTAT
+void n21_netdev_netstat(struct netdev *netdev)
+{
+    // TODO netstat support
+}
+#endif /* NETDEV_USING_NETSTAT */
+
+const struct netdev_ops n21_netdev_ops =
+    {
+        n21_netdev_set_up,
+        n21_netdev_set_down,
+
+        RT_NULL, /* not support set ip, netmask, gatway address */
+        RT_NULL, /* not support set dns server */
+        RT_NULL, /* not support set DHCP status */
+
+#ifdef NETDEV_USING_PING
+        n21_netdev_ping,
+#endif
+#ifdef NETDEV_USING_NETSTAT
+        n21_netdev_netstat,
+#endif
+};
+
+static struct netdev *n21_netdev_add(const char *netdev_name)
+{
+#define n21_NETDEV_MTU 1500
+    struct netdev *netdev = RT_NULL;
+
+    RT_ASSERT(netdev_name);
+
+    netdev = (struct netdev *)rt_calloc(1, sizeof(struct netdev));
+    if (netdev == RT_NULL)
+    {
+        LOG_E("no memory for n21 device(%s) netdev structure.", netdev_name);
+        return RT_NULL;
+    }
+
+    netdev->mtu = n21_NETDEV_MTU;
+    netdev->ops = &n21_netdev_ops;
+
+#ifdef SAL_USING_AT
+    extern int sal_at_netdev_set_pf_info(struct netdev * netdev);
+    /* set the network interface socket/netdb operations */
+    sal_at_netdev_set_pf_info(netdev);
+#endif
+
+    netdev_register(netdev, netdev_name, RT_NULL);
+
+    return netdev;
+}
+
+/* =============================  n21 device operations ============================= */
+
+#define AT_SEND_CMD(client, resp, resp_line, timeout, cmd)                                      \
+    do                                                                                          \
+    {                                                                                           \
+        (resp) = at_resp_set_info((resp), 128, (resp_line), rt_tick_from_millisecond(timeout)); \
+        if (at_obj_exec_cmd((client), (resp), (cmd)) < 0)                                       \
+        {                                                                                       \
+            result = -RT_ERROR;                                                                 \
+            goto __exit;                                                                        \
+        }                                                                                       \
+    } while (0)
+
+/* init for n21 */
+static void n21_init_thread_entry(void *parameter)
+{
+#define INIT_RETRY 5
+#define CPIN_RETRY 10
+#define CSQ_RETRY 10
+#define CREG_RETRY 10
+#define CEREG_RETRY 30
+#define CCID_SIZE 20
+
+    int i, retry_num = INIT_RETRY;
+    char ccid[CCID_SIZE] = {0};
+    char parsed_data[10] = {0};
+    rt_err_t result = RT_EOK;
+    at_response_t resp = RT_NULL;
+    struct at_device *device = (struct at_device *)parameter;
+    struct at_client *client = device->client;
+
+    resp = at_create_resp(128, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for n21 device(%s) response structure.", device->name);
+        return;
+    }
+
+    while (retry_num--)
+    {
+        rt_memset(parsed_data, 0, sizeof(parsed_data));
+
+        n21_power_on(device);
+        rt_thread_mdelay(5000); //check the n21 hardware manual, when we use the pow_key to start n21, it takes about 20s,so we put 25s here to ensure starting n21 normally.
+
+        LOG_I("start initializing the n21 device(%s)", device->name);
+        /* wait n21 startup finish */
+        if (at_client_obj_wait_connect(client, N21_WAIT_CONNECT_TIME))
+        {
+            result = -RT_ETIMEOUT;
+            goto __exit;
+        }
+
+        /* disable echo */
+        AT_SEND_CMD(client, resp, 0, 300, "ATE0");
+        /* get module version */
+        AT_SEND_CMD(client, resp, 0, 300, "ATI");
+        /* show module version */
+        for (i = 0; i < (int)resp->line_counts - 1; i++)
+        {
+            LOG_I("%s", at_resp_get_line(resp, i + 1));
+        }
+        /* check SIM card */
+        for (i = 0; i < CPIN_RETRY; i++)
+        {
+            at_resp_set_info(resp, 128, 2, 5 * RT_TICK_PER_SECOND);
+            if (at_obj_exec_cmd(client, resp, "AT+CCID") < 0)
+            {
+                LOG_E("AT+CCID ERROR! retry:%d.", i);
+                rt_thread_mdelay(1000);
+                continue;
+            }
+
+            if (at_resp_parse_line_args_by_kw(resp, "+CCID:", "+CCID: %s", ccid))
+            {
+                LOG_I("n21 device(%s) SIM card detection success.", device->name);
+                LOG_I("CCID: %s", ccid);
+                break;
+            }
+            rt_thread_mdelay(1000);
+        }
+        if (i == CPIN_RETRY)
+        {
+            LOG_E("n21 device(%s) SIM card detection failed.", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* waiting for dirty data to be digested */
+        rt_thread_mdelay(10);
+        LOG_I("register network!");
+        /* check the GSM network is registered */
+        for (i = 0; i < CREG_RETRY; i++)
+        {
+            AT_SEND_CMD(client, resp, 0, 300, "AT+CREG?");
+            at_resp_parse_line_args_by_kw(resp, "+CREG:", "+CREG: %s", &parsed_data);
+            if (!strncmp(parsed_data, "0,1", sizeof(parsed_data)) ||
+                !strncmp(parsed_data, "0,5", sizeof(parsed_data)))
+            {
+                LOG_I("n21 device(%s) network is registered(%s),", device->name, parsed_data);
+                break;
+            }
+            rt_thread_mdelay(1000);
+        }
+        if (i == CREG_RETRY)
+        {
+            LOG_E("n21 device(%s) network is register failed(%s).", device->name, parsed_data);
+            rt_thread_mdelay(10);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        /* check the GPRS network is registered */
+        for (i = 0; i < CEREG_RETRY; i++)
+        {
+            AT_SEND_CMD(client, resp, 0, 300, "AT+CEREG?");
+            at_resp_parse_line_args_by_kw(resp, "+CEREG:", "+CEREG: %s", &parsed_data);
+            if (!strncmp(parsed_data, "0,1", sizeof(parsed_data)) ||
+                !strncmp(parsed_data, "0,5", sizeof(parsed_data)))
+            {
+                LOG_I("n21 device(%s) GPRS network is registered(%s).", device->name, parsed_data);
+                break;
+            }
+            rt_thread_mdelay(1000);
+        }
+        if (i == CEREG_RETRY)
+        {
+            LOG_E("n21 device(%s) GPRS network is register failed(%s).", device->name, parsed_data);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* check signal strength */
+        for (i = 0; i < CSQ_RETRY; i++)
+        {
+            AT_SEND_CMD(client, resp, 0, 300, "AT+CSQ");
+            at_resp_parse_line_args_by_kw(resp, "+CSQ:", "+CSQ: %s", &parsed_data);
+            if (strncmp(parsed_data, "99,99", sizeof(parsed_data)))
+            {
+                LOG_I("n21 device(%s) signal strength: %s", device->name, parsed_data);
+                break;
+            }
+            rt_thread_mdelay(1000);
+        }
+        if (i == CSQ_RETRY)
+        {
+            LOG_E("n21 device(%s) signal strength check failed (%s)", device->name, parsed_data);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        AT_SEND_CMD(client, resp, 0, 300, "AT+COPS=3,0");
+        AT_SEND_CMD(client, resp, 0, 300, "AT+COPS?");
+        at_resp_parse_line_args_by_kw(resp, "+COPS:", "+COPS: %*[^\"]\"%[^\"]", &parsed_data);
+
+        if (rt_strcmp(parsed_data, "ChinaMobile") == 0)
+        {
+            /* "CMCC" */
+            LOG_I("n21 device(%s) network operator: %s", device->name, parsed_data);
+        }
+        else if (rt_strcmp(parsed_data, "ChinaUnicom") == 0)
+        {
+            /* "UNICOM" */
+            LOG_I("n21 device(%s) network operator: %s", device->name, parsed_data);
+        }
+        else if (rt_strcmp(parsed_data, "ChinaTelecom") == 0)
+        {
+            /* "CT" */
+            LOG_I("n21 device(%s) network operator: %s", device->name, parsed_data);
+        }
+        else
+        {
+            LOG_E("n21 device(%s) Unknown carrier:%s", device->name, parsed_data);
+        }
+        /* the device default response timeout is 150 seconds, but it set to 20 seconds is convenient to use. */
+        AT_SEND_CMD(client, resp, 0, 20 * 1000, "AT+XIIC=1");
+
+        AT_SEND_CMD(client, resp, 0, 300, "AT+XIIC?");
+        if (at_resp_get_line_by_kw(resp, "ERROR") != RT_NULL)
+        {
+            LOG_E("n21 device(%s) get the local address failed.", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        result = RT_EOK;
+
+        AT_SEND_CMD(client, resp, 0, 300, "AT+RECVMODE=1"); //set direct receive
+
+    __exit:
+        if (result == RT_EOK)
+        {
+            break;
+        }
+        else
+        {
+            /* power off the n21 device */
+            n21_power_off(device);
+            rt_thread_mdelay(1000);
+
+            LOG_I("n21 device(%s) initialize retry...", device->name);
+        }
+    }
+
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    if (result == RT_EOK)
+    {
+        /* set network interface device status and address information */
+        n21_netdev_set_info(device->netdev);
+        /* check and create link staus sync thread  */
+        if (rt_thread_find(device->netdev->name) == RT_NULL)
+        {
+            n21_netdev_check_link_status(device->netdev);
+        }
+        LOG_I("n21 device(%s) network initialize success!", device->name);
+    }
+    else
+    {
+        LOG_E("n21 device(%s) network initialize failed(%d)!", device->name, result);
+    }
+}
+
+static int n21_net_init(struct at_device *device)
+{
+#ifdef AT_DEVICE_N21_INIT_ASYN
+    rt_thread_t tid;
+    tid = rt_thread_create("n21_net_init", n21_init_thread_entry, (void *)device,
+                           N21_THREAD_STACK_SIZE, N21_THREAD_PRIORITY, 20);
+    if (tid)
+    {
+        rt_thread_startup(tid);
+    }
+    else
+    {
+        LOG_E("create n21 device(%s) initialization thread failed.", device->name);
+        return -RT_ERROR;
+    }
+#else
+    n21_init_thread_entry(device);
+#endif /* AT_DEVICE_N21_INIT_ASYN */
+
+    return RT_EOK;
+}
+
+static void urc_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    RT_ASSERT(data);
+
+    LOG_I("URC data : %.*s", size, data);
+}
+
+/* n21 device URC table for the device control */
+static const struct at_urc urc_table[] =
+    {
+        {"+PBREADY", "\r\n", urc_func},
+        {"CLOSED", "\r\n", urc_func},
+};
+
+static int n21_init(struct at_device *device)
+{
+    struct at_device_n21 *n21 = (struct at_device_n21 *)device->user_data;
+
+    /* initialize AT client */
+    at_client_init(n21->client_name, n21->recv_line_num);
+
+    device->client = at_client_get(n21->client_name);
+    if (device->client == RT_NULL)
+    {
+        LOG_E("n21 device(%s) initialize failed, get AT client(%s) failed.", n21->device_name, n21->client_name);
+        return -RT_ERROR;
+    }
+
+    /* register URC data execution function  */
+    at_obj_set_urc_table(device->client, urc_table, sizeof(urc_table) / sizeof(urc_table[0]));
+
+#ifdef AT_USING_SOCKET
+    n21_socket_init(device);
+#endif
+
+    /* add n21 device to the netdev list */
+    device->netdev = n21_netdev_add(n21->device_name);
+    if (device->netdev == RT_NULL)
+    {
+        LOG_E("n21 device(%s) initialize failed, get network interface device failed.", n21->device_name);
+        return -RT_ERROR;
+    }
+
+    /* initialize n21 pin configuration */
+    if (n21->power_pin != -1)
+    {
+        rt_pin_mode(n21->power_pin, PIN_MODE_OUTPUT);
+    }
+    if (n21->power_status_pin != -1)
+    {
+        rt_pin_mode(n21->power_status_pin, PIN_MODE_INPUT);
+    }
+
+    /* initialize n21 device network */
+    return n21_netdev_set_up(device->netdev);
+}
+
+static int n21_deinit(struct at_device *device)
+{
+    return n21_netdev_set_down(device->netdev);
+}
+
+static int n21_reset(struct at_device *device)
+{
+    int result = RT_EOK;
+    struct at_client *client = device->client;
+
+    /* n21 only poweroff cmd,not support reboot.*/
+    /* use power pin reboot */
+#if (N21_SAMPLE_POWER_PIN != -1)
+    rt_pin_write(N21_SAMPLE_POWER_PIN, 0);
+    rt_thread_mdelay(500);
+    rt_pin_write(N21_SAMPLE_POWER_PIN, 1);
+
+    rt_thread_mdelay(1000);
+
+    /* waiting 10 seconds for n21 device reset */
+    device->is_init = RT_FALSE;
+    if (at_client_obj_wait_connect(client, N21_WAIT_CONNECT_TIME))
+    {
+        return -RT_ETIMEOUT;
+    }
+
+    /* initialize n21 device network */
+    n21_net_init(device);
+
+    device->is_init = RT_TRUE;
+#else
+    result = -RT_ERROR;
+#endif
+
+    return result;
+}
+
+static int n21_control(struct at_device *device, int cmd, void *arg)
+{
+    int result = -RT_ERROR;
+
+    RT_ASSERT(device);
+
+    switch (cmd)
+    {
+    case AT_DEVICE_CTRL_POWER_ON:
+    case AT_DEVICE_CTRL_POWER_OFF:
+    case AT_DEVICE_CTRL_LOW_POWER:
+    case AT_DEVICE_CTRL_SLEEP:
+    case AT_DEVICE_CTRL_WAKEUP:
+    case AT_DEVICE_CTRL_NET_CONN:
+    case AT_DEVICE_CTRL_NET_DISCONN:
+    case AT_DEVICE_CTRL_SET_WIFI_INFO:
+    case AT_DEVICE_CTRL_GET_SIGNAL:
+    case AT_DEVICE_CTRL_GET_GPS:
+    case AT_DEVICE_CTRL_GET_VER:
+        LOG_W("n21 not support the control command(%d).", cmd);
+        break;
+    case AT_DEVICE_CTRL_RESET:
+        result = n21_reset(device);
+        break;
+    default:
+        LOG_E("input error control command(%d).", cmd);
+        break;
+    }
+
+    return result;
+}
+
+const struct at_device_ops n21_device_ops =
+    {
+        n21_init,
+        n21_deinit,
+        n21_control,
+};
+
+static int n21_device_class_register(void)
+{
+    struct at_device_class *class = RT_NULL;
+
+    class = (struct at_device_class *)rt_calloc(1, sizeof(struct at_device_class));
+    if (class == RT_NULL)
+    {
+        LOG_E("no memory for n21 device class create.");
+        return -RT_ENOMEM;
+    }
+
+    /* fill n21 device class object */
+#ifdef AT_USING_SOCKET
+    n21_socket_class_register(class);
+#endif
+    class->device_ops = &n21_device_ops;
+
+    return at_device_class_register(class, AT_DEVICE_CLASS_N21);
+}
+INIT_DEVICE_EXPORT(n21_device_class_register);
+
+#endif /* AT_DEVICE_USING_N21 */

class/n21/at_device_n21.h

@@ -0,0 +1,66 @@
+/*
+ * File      : at_device_n21.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2020, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-05-22     shuobatian     first version
+ */
+
+#ifndef __AT_DEVICE_N21_H__
+#define __AT_DEVICE_N21_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdlib.h>
+
+#include <at_device.h>
+
+/* The maximum number of sockets supported by the N21 device */
+#define AT_DEVICE_N21_SOCKETS_NUM      4
+
+struct at_device_n21
+{     
+    char *device_name;
+    char *client_name;
+
+    int power_pin;
+    int power_status_pin;
+    size_t recv_line_num;
+    struct at_device device;
+
+    void *user_data;
+};
+
+#ifdef AT_USING_SOCKET
+
+/* n21 device socket initialize */
+int n21_socket_init(struct at_device *device);
+
+/* n21 device class socket register */
+int n21_socket_class_register(struct at_device_class *class);
+
+#endif /* AT_USING_SOCKET */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __AT_DEVICE_N21_H__ */

class/n21/at_socket_n21.c

@@ -0,0 +1,661 @@
+/*
+ * File      : at_socket_n21.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2020, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author        Notes
+ * 2020-05-22     shuobatian    first version
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <at_device_n21.h>
+
+#if !defined(AT_SW_VERSION_NUM) || AT_SW_VERSION_NUM < 0x10300
+#error "This AT Client version is older, please check and update latest AT Client!"
+#endif
+
+#define LOG_TAG "at.skt"
+#include <at_log.h>
+
+#if defined(AT_DEVICE_USING_N21) && defined(AT_USING_SOCKET)
+
+#define N21_MODULE_SEND_MAX_SIZE 1000
+
+/* set real event by current socket and current state */
+#define SET_EVENT(socket, event) (((socket + 1) << 16) | (event))
+
+/* AT socket event type */
+#define N21_EVENT_CONN_OK (1L << 0)
+#define N21_EVENT_SEND_OK (1L << 1)
+#define N21_EVENT_RECV_OK (1L << 2)
+#define N21_EVNET_CLOSE_OK (1L << 3)
+#define N21_EVENT_CONN_FAIL (1L << 4)
+#define N21_EVENT_SEND_FAIL (1L << 5)
+
+static at_evt_cb_t at_evt_cb_set[] = {
+    [AT_SOCKET_EVT_RECV] = NULL,
+    [AT_SOCKET_EVT_CLOSED] = NULL,
+};
+
+static int n21_socket_event_send(struct at_device *device, uint32_t event)
+{
+    return (int)rt_event_send(device->socket_event, event);
+}
+
+static int n21_socket_event_recv(struct at_device *device, uint32_t event, uint32_t timeout, rt_uint8_t option)
+{
+    int result = RT_EOK;
+    rt_uint32_t recved;
+
+    result = rt_event_recv(device->socket_event, event, option | RT_EVENT_FLAG_CLEAR, timeout, &recved);
+    if (result != RT_EOK)
+    {
+        return -RT_ETIMEOUT;
+    }
+
+    return recved;
+}
+
+/**
+ * close socket by AT commands.
+ *
+ * @param current socket
+ *
+ * @return  0: close socket success
+ *         -1: send AT commands error
+ *         -2: wait socket event timeout
+ *         -5: no memory
+ */
+static int n21_socket_close(struct at_socket *socket)
+{
+    uint32_t event = 0;
+    int result = RT_EOK;
+    int device_socket = (int)socket->user_data;
+    enum at_socket_type type_socket = socket->type;
+    struct at_device *device = (struct at_device *)socket->device;
+
+    /* clear socket close event */
+    event = SET_EVENT(device_socket, N21_EVNET_CLOSE_OK);
+    n21_socket_event_recv(device, event, 0, RT_EVENT_FLAG_OR);
+
+    if (type_socket == AT_SOCKET_TCP)
+    {
+        if (at_obj_exec_cmd(device->client, NULL, "AT+TCPCLOSE=%d", device_socket) < 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+    }
+    else if (type_socket == AT_SOCKET_UDP)
+    {
+        if (at_obj_exec_cmd(device->client, NULL, "AT+UDPCLOSE=%d", device_socket) < 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+    }
+
+    if (n21_socket_event_recv(device, event, rt_tick_from_millisecond(300 * 3), RT_EVENT_FLAG_AND) < 0)
+    {
+        LOG_E("n21 device(%s) socket(%d) close failed, wait close OK timeout.", device->name, device_socket);
+        result = -RT_ETIMEOUT;
+        goto __exit;
+    }
+
+__exit:
+    return result;
+}
+
+/**
+ * create TCP/UDP client or server connect by AT commands.
+ *
+ * @param socket current socket
+ * @param ip server or client IP address
+ * @param port server or client port
+ * @param type connect socket type(tcp, udp)
+ * @param is_client connection is client
+ *
+ * @return   0: connect success
+ *          -1: connect failed, send commands error or type error
+ *          -2: wait socket event timeout
+ *          -5: no memory
+ */
+static int n21_socket_connect(struct at_socket *socket, char *ip, int32_t port, enum at_socket_type type, rt_bool_t is_client)
+{
+    uint32_t event = 0;
+    rt_bool_t retryed = RT_FALSE;
+    at_response_t resp = RT_NULL;
+    int result = RT_EOK, event_result = 0;
+    int device_socket = (int)socket->user_data;
+    struct at_device *device = (struct at_device *)socket->device;
+
+    RT_ASSERT(ip);
+    RT_ASSERT(port >= 0);
+
+    resp = at_create_resp(128, 0, 5 * RT_TICK_PER_SECOND);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for n21 device(%s) response structure.", device->name);
+        return -RT_ENOMEM;
+    }
+
+__retry:
+
+    /* clear socket connect event */
+    event = SET_EVENT(device_socket, N21_EVENT_CONN_OK | N21_EVENT_CONN_FAIL);
+    n21_socket_event_recv(device, event, 0, RT_EVENT_FLAG_OR);
+
+    if (is_client)
+    {
+        switch (type)
+        {
+        case AT_SOCKET_TCP:
+            /* send AT commands(eg: AT+TCPSETUP=<n>,<ip>,<port>) to connect TCP server */
+            if (at_obj_exec_cmd(device->client, RT_NULL,
+                                "AT+TCPSETUP=%d,%s,%d", device_socket, ip, port) < 0)
+            {
+                result = -RT_ERROR;
+                goto __exit;
+            }
+            break;
+            /* send AT commands(eg: AT+UDPSETUP=<n>,<ip>,<port>) to connect TCP server */
+        case AT_SOCKET_UDP:
+            if (at_obj_exec_cmd(device->client, RT_NULL,
+                                "AT+UDPSETUP=%d,%s,%d", device_socket, ip, port) < 0)
+            {
+                result = -RT_ERROR;
+                goto __exit;
+            }
+            break;
+
+        default:
+            LOG_E("n21 device(%s) not supported connect type : %d.", device->name, type);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+    }
+
+    /* waiting result event from AT URC, the device default connection timeout is 75 seconds, but it set to 10 seconds is convenient to use */
+    if (n21_socket_event_recv(device, SET_EVENT(device_socket, 0), 10 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR) < 0)
+    {
+        LOG_E("n21 device(%s) socket(%d) connect failed, wait connect result timeout.", device->name, device_socket);
+        result = -RT_ETIMEOUT;
+        goto __exit;
+    }
+    /* waiting OK or failed result */
+    event_result = n21_socket_event_recv(device,
+                                         N21_EVENT_CONN_OK | N21_EVENT_CONN_FAIL, 1 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR);
+    if (event_result < 0)
+    {
+        LOG_E("n21 device(%s) socket(%d) connect failed, wait connect OK|FAIL timeout.", device->name, device_socket);
+        result = -RT_ETIMEOUT;
+        goto __exit;
+    }
+    /* check result */
+    if (event_result & N21_EVENT_CONN_FAIL)
+    {
+        if (retryed == RT_FALSE)
+        {
+            LOG_D("n21 device(%s) socket(%d) connect failed, maybe the socket was not be closed at the last time and now will retry.",
+                  device->name, device_socket);
+            if (n21_socket_close(socket) < 0)
+            {
+                result = -RT_ERROR;
+                goto __exit;
+            }
+            retryed = RT_TRUE;
+            goto __retry;
+        }
+        LOG_E("n21 device(%s) socket(%d) connect failed.", device->name, device_socket);
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+/**
+ * send data to server or client by AT commands.
+ *
+ * @param socket current socket
+ * @param buff send buffer
+ * @param bfsz send buffer size
+ * @param type connect socket type(tcp, udp)
+ *
+ * @return >=0: the size of send success
+ *          -1: send AT commands error or send data error
+ *          -2: waited socket event timeout
+ *          -5: no memory
+ */
+static int n21_socket_send(struct at_socket *socket, const char *buff, size_t bfsz, enum at_socket_type type)
+{
+    uint32_t event = 0;
+    int result = RT_EOK, event_result = 0;
+    size_t cur_pkt_size = 0, sent_size = 0;
+    at_response_t resp = RT_NULL;
+    int device_socket = (int)socket->user_data;
+    struct at_device *device = (struct at_device *)socket->device;
+    rt_mutex_t lock = device->client->lock;
+
+    RT_ASSERT(buff);
+
+    resp = at_create_resp(128, 2, 10 * RT_TICK_PER_SECOND);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for n21 device(%s) response structure.", device->name);
+        return -RT_ENOMEM;
+    }
+
+    rt_mutex_take(lock, RT_WAITING_FOREVER);
+
+    /* clear socket connect event */
+    event = SET_EVENT(device_socket, N21_EVENT_SEND_OK | N21_EVENT_SEND_FAIL);
+    n21_socket_event_recv(device, event, 0, RT_EVENT_FLAG_OR);
+
+    /* set AT client end sign to deal with '>' sign.*/
+    at_obj_set_end_sign(device->client, '>');
+
+    while (sent_size < bfsz)
+    {
+        if (bfsz - sent_size < N21_MODULE_SEND_MAX_SIZE)
+        {
+            cur_pkt_size = bfsz - sent_size;
+        }
+        else
+        {
+            cur_pkt_size = N21_MODULE_SEND_MAX_SIZE;
+        }
+
+        /* send the "AT+QISEND" commands to AT server than receive the '>' response on the first line. */
+        if (type == AT_SOCKET_TCP)
+        {
+            if (at_obj_exec_cmd(device->client, resp, "AT+TCPSEND=%d,%d", device_socket, cur_pkt_size) < 0)
+            {
+                result = -RT_ERROR;
+                goto __exit;
+            }
+        }
+        else if (type == AT_SOCKET_UDP)
+        {
+            if (at_obj_exec_cmd(device->client, resp, "AT+UDPSEND=%d,%d", device_socket, cur_pkt_size) < 0)
+            {
+                result = -RT_ERROR;
+                goto __exit;
+            }
+        }
+
+        rt_thread_mdelay(100); //n21 要求收到> 等待50-100ms 发送数据
+        /* send the real data to server or client */
+        result = (int)at_client_obj_send(device->client, buff + sent_size, cur_pkt_size);
+        if (result == 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* waiting OK or failed result */
+        event_result = n21_socket_event_recv(device,
+                                             N21_EVENT_SEND_OK | N21_EVENT_SEND_FAIL, 5 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR);
+        if (event_result < 0)
+        {
+            LOG_E("n21 device(%s) socket(%d) send failed, wait connect OK|FAIL timeout.", device->name, device_socket);
+            result = -RT_ETIMEOUT;
+            goto __exit;
+        }
+        /* check result */
+        if (event_result & N21_EVENT_SEND_FAIL)
+        {
+            LOG_E("n21 device(%s) socket(%d) send failed.", device->name, device_socket);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        sent_size += cur_pkt_size;
+    }
+
+__exit:
+    /* reset the end sign for data conflict */
+    at_obj_set_end_sign(device->client, 0);
+
+    rt_mutex_release(lock);
+
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+/**
+ * domain resolve by AT commands.
+ *
+ * @param name domain name
+ * @param ip parsed IP address, it's length must be 16
+ *
+ * @return  0: domain resolve success
+ *         -1: send AT commands error or response error
+ *         -2: wait socket event timeout
+ *         -5: no memory
+ */
+static int n21_domain_resolve(const char *name, char ip[16])
+{
+#define RESOLVE_RETRY 5
+
+    int i, result = RT_EOK;
+    char recv_ip[16] = {0};
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+
+    RT_ASSERT(name);
+    RT_ASSERT(ip);
+
+    device = at_device_get_first_initialized();
+    if (device == RT_NULL)
+    {
+        LOG_E("get first initialization n21 device failed.");
+        return -RT_ERROR;
+    }
+
+    /* The maximum response time is 14 seconds, affected by network status */
+    resp = at_create_resp(128, 4, 14 * RT_TICK_PER_SECOND);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for n21 device(%s) response structure.", device->name);
+        return -RT_ENOMEM;
+    }
+
+    for (i = 0; i < RESOLVE_RETRY; i++)
+    {
+        int err_code = 0;
+
+        if (at_obj_exec_cmd(device->client, resp, "AT+CDNSGIP=\"%s\"", name) < 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* domain name prase error options */
+        if (at_resp_parse_line_args_by_kw(resp, "+CDNSGIP: 0", "+CDNSGIP: 0,%d", &err_code) > 0)
+        {
+            /* 3 - network error, 8 - dns common error */
+            if (err_code == 3 || err_code == 8)
+            {
+                result = -RT_ERROR;
+                goto __exit;
+            }
+        }
+
+        /* parse the third line of response data, get the IP address */
+        if (at_resp_parse_line_args_by_kw(resp, "+CDNSGIP:", "%*[^,],%*[^,],\"%[^\"]", recv_ip) < 0)
+        {
+            rt_thread_mdelay(100);
+            /* resolve failed, maybe receive an URC CRLF */
+            continue;
+        }
+
+        if (rt_strlen(recv_ip) < 8)
+        {
+            rt_thread_mdelay(100);
+            /* resolve failed, maybe receive an URC CRLF */
+            continue;
+        }
+        else
+        {
+            rt_thread_mdelay(10);
+            rt_strncpy(ip, recv_ip, 15);
+            ip[15] = '\0';
+            break;
+        }
+    }
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+/**
+ * set AT socket event notice callback
+ *
+ * @param event notice event
+ * @param cb notice callback
+ */
+static void n21_socket_set_event_cb(at_socket_evt_t event, at_evt_cb_t cb)
+{
+    if (event < sizeof(at_evt_cb_set) / sizeof(at_evt_cb_set[1]))
+    {
+        at_evt_cb_set[event] = cb;
+    }
+}
+
+static void urc_connect_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int device_socket = 0;
+    struct at_device *device = RT_NULL;
+    char *client_name = client->device->parent.name;
+    char constat[16] = {0};
+
+    RT_ASSERT(data && size);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n21 device by client name(%s) failed.", client_name);
+        return;
+    }
+
+    /* get the current socket by receive data */
+    sscanf(data, "%*[^ ]%d,%s\r\n", &device_socket, constat);
+
+    LOG_D("data:%s", data);
+
+    LOG_D("socket:%d,constat:%s", device_socket, constat);
+
+    if (strstr(constat, "OK"))
+    {
+        LOG_D("socket %d:connect ok!", device_socket);
+        n21_socket_event_send(device, SET_EVENT(device_socket, N21_EVENT_CONN_OK));
+    }
+    else if (strstr(constat, "FAIL"))
+    {
+        LOG_D("socket %d:connect fail!", device_socket);
+        n21_socket_event_send(device, SET_EVENT(device_socket, N21_EVENT_CONN_FAIL));
+    }
+}
+
+static void urc_send_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int device_socket = 0;
+    struct at_device *device = RT_NULL;
+    char *client_name = client->device->parent.name;
+
+    RT_ASSERT(data && size);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n21 device by client name(%s) failed.", client_name);
+        return;
+    }
+
+    /* get the current socket by receive data */
+    sscanf(data, "%*[^ ] %d,%*d", &device_socket);
+
+    if (rt_strstr(data, "OPERATION"))
+    {
+        LOG_E("input data timeout!");
+        n21_socket_event_send(device, SET_EVENT(device_socket, N21_EVENT_SEND_FAIL));
+    }
+    else if (rt_strstr(data, "ERROR")) //链路号错误
+    {
+        n21_socket_event_send(device, SET_EVENT(device_socket, N21_EVENT_SEND_FAIL));
+    }
+    else //没有错误就是成功
+    {
+        n21_socket_event_send(device, SET_EVENT(device_socket, N21_EVENT_SEND_OK));
+    }
+}
+
+static void urc_close_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int device_socket = 0;
+    struct at_device *device = RT_NULL;
+    char *client_name = client->device->parent.name;
+
+    RT_ASSERT(data && size);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n21 device by client name(%s) failed.", client_name);
+        return;
+    }
+
+    /* get the current socket by receive data */
+    /* +TCPCLOSE: 1,OK */
+    sscanf(data, "%*[^ ]%d,%*s", &device_socket);
+
+    if (rt_strstr(data, "OK"))
+    {
+        n21_socket_event_send(device, SET_EVENT(device_socket, N21_EVNET_CLOSE_OK));
+    }
+    else if (rt_strstr(data, "Link Closed"))
+    {
+        struct at_socket *socket = RT_NULL;
+
+        /* get AT socket object by device socket descriptor */
+        socket = &(device->sockets[device_socket]);
+
+        /* notice the socket is disconnect by remote */
+        if (at_evt_cb_set[AT_SOCKET_EVT_CLOSED])
+        {
+            at_evt_cb_set[AT_SOCKET_EVT_CLOSED](socket, AT_SOCKET_EVT_CLOSED, RT_NULL, 0);
+        }
+    }
+}
+
+static void urc_recv_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int device_socket = 0;
+    rt_size_t bfsz = 0;
+    int data_index = size - 1;
+    char *recv_buf = RT_NULL;
+    struct at_socket *socket = RT_NULL;
+    struct at_device *device = RT_NULL;
+    char *client_name = client->device->parent.name;
+
+    RT_ASSERT(data && size);
+
+    /* get the current socket and receive buffer size by receive data */
+    sscanf(data, "%*[^ ] %d,%d,", &device_socket, (int *)&bfsz);
+
+    recv_buf = (char *)rt_calloc(1, bfsz + 1);
+
+    if (recv_buf == RT_NULL)
+    {
+        LOG_E("no memory for n21 device(%s) URC receive buffer (%d).", device->name, bfsz);
+        return;
+    }
+
+    data_index -= 2; //"\r\n"移除
+    recv_buf[bfsz] = '\0';
+    for (int i = bfsz - 1; i >= 0; i--)
+    {
+        recv_buf[i] = data[data_index];
+        data_index--;
+    }
+    /* get receive timeout by receive buffer length */
+
+    LOG_D("recv socket:%d", device_socket);
+
+    if (device_socket < 0 || bfsz == 0)
+    {
+        return;
+    }
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n21 device by client name(%s) failed.", client_name);
+        return;
+    }
+
+    /* get AT socket object by device socket descriptor */
+    socket = &(device->sockets[device_socket]);
+
+    /* notice the receive buffer and buffer size */
+    if (at_evt_cb_set[AT_SOCKET_EVT_RECV])
+    {
+        at_evt_cb_set[AT_SOCKET_EVT_RECV](socket, AT_SOCKET_EVT_RECV, recv_buf, bfsz);
+    }
+}
+
+/* n21 device URC table for the socket data */
+static const struct at_urc urc_table[] =
+    {
+        {"+TCPSETUP:", "\r\n", urc_connect_func},
+        {"+UDPSETUP:", "\r\n", urc_connect_func},
+        {"+TCPSEND:", "\r\n", urc_send_func},
+        {"+UDPSEND:", "\r\n", urc_send_func},
+        {"+TCPCLOSE:", "\r\n", urc_close_func},
+        {"+UDPCLOSE:", "\r\n", urc_close_func},
+        {"+TCPRECV:", "\r\n", urc_recv_func},
+        {"+UDPRECV:", "\r\n", urc_recv_func},
+
+};
+
+static const struct at_socket_ops n21_socket_ops =
+    {
+        n21_socket_connect,
+        n21_socket_close,
+        n21_socket_send,
+        n21_domain_resolve,
+        n21_socket_set_event_cb,
+};
+
+int n21_socket_init(struct at_device *device)
+{
+    RT_ASSERT(device);
+
+    /* register URC data execution function  */
+    at_obj_set_urc_table(device->client, urc_table, sizeof(urc_table) / sizeof(urc_table[0]));
+
+    return RT_EOK;
+}
+
+int n21_socket_class_register(struct at_device_class *class)
+{
+    RT_ASSERT(class);
+
+    class->socket_num = AT_DEVICE_N21_SOCKETS_NUM;
+    class->socket_ops = &n21_socket_ops;
+
+    return RT_EOK;
+}
+
+#endif /* AT_DEVICE_USING_n21 && AT_USING_SOCKET */

class/n58/Kconfig

@@ -0,0 +1,37 @@
+
+# N58 AT device configuration
+menuconfig AT_DEVICE_USING_N58
+    bool "neoway N58"
+    default n
+
+if AT_DEVICE_USING_N58
+
+    config AT_DEVICE_N58_INIT_ASYN
+        bool "Enable initialize by thread"
+        default n
+
+    config AT_DEVICE_N58_SAMPLE
+        bool "Enable sample"
+        default y
+
+    if AT_DEVICE_N58_SAMPLE
+
+       config N58_SAMPLE_POWER_PIN
+            int "Power pin"
+            default -1
+
+        config N58_SAMPLE_STATUS_PIN
+            int "Power status pin"
+            default -1
+
+        config N58_SAMPLE_CLIENT_NAME
+            string "AT client device name"
+            default "uart3"
+
+        config N58_SAMPLE_RECV_BUFF_LEN
+            int "The maximum length of receive line buffer"
+            default 512
+
+    endif
+
+endif

class/n58/at_device_n58.c

@@ -0,0 +1,991 @@
+/*
+ * File      : at_socket_n58.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2020, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author            Notes
+ * 2020-05-22     shuobatian        first version
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <at_device_n58.h>
+
+#if !defined(AT_SW_VERSION_NUM) || AT_SW_VERSION_NUM < 0x10300
+#error "This AT Client version is older, please check and update latest AT Client!"
+#endif
+
+#define LOG_TAG "at.dev"
+#include <at_log.h>
+
+#ifdef AT_DEVICE_USING_N58
+
+#define N58_WAIT_CONNECT_TIME 10000
+#define N58_THREAD_STACK_SIZE 2048
+#define N58_THREAD_PRIORITY (RT_THREAD_PRIORITY_MAX / 2)
+// #define N58_THREAD_PRIORITY 6
+
+static void n58_power_on(struct at_device *device)
+{
+
+    struct at_device_n58 *n58 = RT_NULL;
+
+    n58 = (struct at_device_n58 *)device->user_data;
+
+    /* not nead to set pin configuration for n58 device power on */
+#if (N58_SAMPLE_POWER_PIN != -1)
+#if (N58_SAMPLE_STATUS_PIN != -1)
+    if (n58->power_pin == -1 || n58->power_status_pin == -1)
+    {
+        return;
+    }
+
+    if (rt_pin_read(n58->power_status_pin) == PIN_HIGH)
+    {
+        return;
+    }
+    rt_pin_write(n58->power_pin, PIN_HIGH);
+    while (rt_pin_read(n58->power_status_pin) == PIN_LOW)
+    {
+        rt_thread_mdelay(10);
+    }
+    rt_pin_write(n58->power_pin, PIN_LOW);
+#else
+    if (n58->power_pin == -1)
+    {
+        return;
+    }
+    rt_pin_write(n58->power_pin, PIN_HIGH);
+#endif
+#endif
+}
+
+static void n58_power_off(struct at_device *device)
+{
+    struct at_device_n58 *n58 = RT_NULL;
+
+    n58 = (struct at_device_n58 *)device->user_data;
+
+#if (N58_SAMPLE_POWER_PIN != -1)
+#if (N58_SAMPLE_STATUS_PIN != -1)
+    /* not nead to set pin configuration for n58 device power on */
+    if (n58->power_pin == -1 || n58->power_status_pin == -1)
+    {
+        return;
+    }
+    if (rt_pin_read(n58->power_status_pin) == PIN_LOW)
+    {
+        return;
+    }
+
+    rt_pin_write(n58->power_pin, PIN_HIGH);
+    while (rt_pin_read(n58->power_status_pin) == PIN_HIGH)
+    {
+        rt_thread_mdelay(10);
+    }
+    rt_pin_write(n58->power_pin, PIN_LOW);
+#else
+    if (n58->power_pin == -1)
+    {
+        return;
+    }
+    rt_pin_write(n58->power_pin, PIN_LOW);
+#endif
+#endif
+}
+
+/* =============================  neoway n58 network interface operations ============================= */
+
+/* set n58 network interface device status and address information */
+static int n58_netdev_set_info(struct netdev *netdev)
+{
+#define N58_SET_INFO_RESP_SIZE 128
+#define N58_INFO_RESP_TIMO rt_tick_from_millisecond(300)
+
+    int result = RT_EOK;
+    //int at_result = 0;
+    ip_addr_t addr;
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+
+    if (netdev == RT_NULL)
+    {
+        LOG_E("input network interface device is NULL.");
+        return -RT_ERROR;
+    }
+    LOG_D("netdev set info");
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n58 device by netdev name(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    /* set network interface device status */
+    netdev_low_level_set_status(netdev, RT_TRUE);
+    netdev_low_level_set_link_status(netdev, RT_TRUE);
+    netdev_low_level_set_dhcp_status(netdev, RT_TRUE);
+
+    resp = at_create_resp(N58_SET_INFO_RESP_SIZE, 0, N58_INFO_RESP_TIMO);
+    if (resp == RT_NULL)
+    {
+        LOG_E("n58 device(%s) set IP address failed, no memory for response object.", device->name);
+        result = -RT_ENOMEM;
+        goto __exit;
+    }
+
+    /* set network interface device hardware address(IEMI) */
+    {
+#define N58_NETDEV_HWADDR_LEN 8
+#define N58_IEMI_LEN 15
+
+        char iemi[N58_IEMI_LEN] = {0};
+        int i = 0, j = 0;
+
+        /* send "AT+GSN" commond to get device IEMI */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CGSN") < 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        if (at_resp_parse_line_args_by_kw(resp, "+CGSN:", "+CGSN: %s", iemi) <= 0)
+        {
+            LOG_E("n58 device(%s) IEMI get fail", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        netdev->hwaddr_len = N58_NETDEV_HWADDR_LEN;
+        /* get hardware address by IEMI */
+        for (i = 0, j = 0; i < N58_NETDEV_HWADDR_LEN && j < N58_IEMI_LEN; i++, j += 2)
+        {
+            if (j != N58_IEMI_LEN - 1)
+            {
+                netdev->hwaddr[i] = (iemi[j] - '0') * 10 + (iemi[j + 1] - '0');
+            }
+            else
+            {
+                netdev->hwaddr[i] = (iemi[j] - '0');
+            }
+        }
+
+        LOG_D("hwaddr:%.2X-%.2X-%.2X-%.2X-%.2X-%.2X-%.2X-%.2X,IEMI:%s", netdev->hwaddr[0],
+              netdev->hwaddr[1], netdev->hwaddr[2], netdev->hwaddr[3], netdev->hwaddr[4],
+              netdev->hwaddr[5], netdev->hwaddr[6], netdev->hwaddr[7], iemi);
+    }
+    LOG_D("get IP address");
+    /* get network interface device IP address */
+    {
+#define IP_ADDR_SIZE_MAX 32
+        char ipaddr[IP_ADDR_SIZE_MAX] = {0};
+
+        /* send "AT+XIIC?" commond to get IP address */
+        if (at_obj_exec_cmd(device->client, resp, "AT+XIIC?") < 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        if (at_resp_parse_line_args_by_kw(resp, "+XIIC:    ", "+XIIC:%*[^,],%s", ipaddr) <= 0)
+        {
+            LOG_E("n58 device(%s) prase \"AT+XIIC?\" commands resposne data error!", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        LOG_I("n58 device(%s) IP address: %s", device->name, ipaddr);
+
+        /* set network interface address information */
+        inet_aton(ipaddr, &addr);
+        netdev_low_level_set_ipaddr(netdev, &addr);
+    }
+
+    /* set network interface device dns server */
+    {
+#define DNS_ADDR_SIZE_MAX 16
+        char dns_server1[DNS_ADDR_SIZE_MAX] = {0}, dns_server2[DNS_ADDR_SIZE_MAX] = {0};
+
+        /* send "AT+DNSSERVER?" commond to get DNS servers address */
+        if (at_obj_exec_cmd(device->client, resp, "AT+DNSSERVER?") < 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        if (at_resp_parse_line_args_by_kw(resp, "+DNSSERVER: ", "+DNSSERVER: dns1:%[^,],dns2:%s\r\n", dns_server1, dns_server2) <= 0)
+        {
+            LOG_E("Prase \"AT+DNSSERVER?\" commands resposne data error!");
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        LOG_D("n58 device(%s) primary DNS server address: %s", device->name, dns_server1);
+        LOG_D("n58 device(%s) secondary DNS server address: %s", device->name, dns_server2);
+
+        inet_aton(dns_server1, &addr);
+        netdev_low_level_set_dns_server(netdev, 0, &addr);
+
+        inet_aton(dns_server2, &addr);
+        netdev_low_level_set_dns_server(netdev, 1, &addr);
+    }
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+static void check_link_status_entry(void *parameter)
+{
+#define N58_LINK_STATUS_OK 1
+#define N58_LINK_RESP_SIZE 64
+#define N58_LINK_RESP_TIMO (3 * RT_TICK_PER_SECOND)
+#define N58_LINK_DELAY_TIME (30 * RT_TICK_PER_SECOND)
+
+    at_response_t resp = RT_NULL;
+    int result_code, link_status;
+    struct at_device *device = RT_NULL;
+
+#if (N58_SAMPLE_STATUS_PIN != -1)
+    struct at_device_n58 *n58 = RT_NULL;
+#endif
+
+    char parsed_data[10] = {0};
+    struct netdev *netdev = (struct netdev *)parameter;
+
+    LOG_D("statrt n58 device(%s) link status check \n");
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n58 device by netdev name(%s) failed.", netdev->name);
+        return;
+    }
+
+#if (N58_SAMPLE_STATUS_PIN != -1)
+    n58 = (struct at_device_n58 *)device->user_data;
+#endif
+
+    resp = at_create_resp(N58_LINK_RESP_SIZE, 0, N58_LINK_RESP_TIMO);
+    if (resp == RT_NULL)
+    {
+        LOG_E("n58 device(%s) set check link status failed, no memory for response object.", device->name);
+        return;
+    }
+
+    while (1)
+    {
+        /* send "AT+CEREG?" commond  to check netweork interface device link status */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CEREG?") < 0)
+        {
+            rt_thread_mdelay(N58_LINK_DELAY_TIME);
+            LOG_E("n58 device(%s) send cgreg failed", device->name);
+            continue;
+        }
+
+        link_status = -1;
+        at_resp_parse_line_args_by_kw(resp, "+CEREG:", "+CEREG: %d,%d\r\n", &result_code, &link_status);
+
+        /* check the network interface device link status  */
+        if ((N58_LINK_STATUS_OK == link_status) != netdev_is_link_up(netdev))
+        {
+            netdev_low_level_set_link_status(netdev, (N58_LINK_STATUS_OK == link_status));
+        }
+
+#if (N58_SAMPLE_STATUS_PIN != -1)
+        if (rt_pin_read(n58->power_status_pin) == PIN_HIGH) //check the module_status , if moduble_status is Low, user can do your logic here
+        {
+#endif
+            if (at_obj_exec_cmd(device->client, resp, "AT+CSQ") == 0)
+            {
+                at_resp_parse_line_args_by_kw(resp, "+CSQ:", "+CSQ: %s", &parsed_data);
+                if (strncmp(parsed_data, "99,99", sizeof(parsed_data)))
+                {
+                    LOG_D("n58 device(%s) signal strength: %s", device->name, parsed_data);
+                }
+            }
+#if (N58_SAMPLE_STATUS_PIN != -1)
+        }
+        else
+        {
+            LOG_E("netdev name(%s) status pin is low", device->name);
+            netdev_low_level_set_link_status(netdev, RT_FALSE);
+            return;
+        }
+#endif
+        rt_thread_mdelay(N58_LINK_DELAY_TIME);
+    }
+}
+
+static int n58_netdev_check_link_status(struct netdev *netdev)
+{
+
+#define N58_LINK_THREAD_TICK 20
+#define N58_LINK_THREAD_STACK_SIZE 1024
+#define N58_LINK_THREAD_PRIORITY (RT_THREAD_PRIORITY_MAX - 22)
+
+    rt_thread_t tid;
+    char tname[RT_NAME_MAX] = {0};
+
+    if (netdev == RT_NULL)
+    {
+        LOG_E("input network interface device is NULL.\n");
+        return -RT_ERROR;
+    }
+
+    rt_snprintf(tname, RT_NAME_MAX, "%s_link", netdev->name);
+
+    tid = rt_thread_create(tname, check_link_status_entry, (void *)netdev,
+                           N58_LINK_THREAD_STACK_SIZE, N58_LINK_THREAD_PRIORITY, N58_LINK_THREAD_TICK);
+    if (tid)
+    {
+        rt_thread_startup(tid);
+    }
+
+    return RT_EOK;
+}
+
+static int n58_net_init(struct at_device *device);
+
+static int n58_netdev_set_up(struct netdev *netdev)
+{
+    struct at_device *device = RT_NULL;
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n58 device by netdev name(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    if (device->is_init == RT_FALSE)
+    {
+        n58_net_init(device);
+        device->is_init = RT_TRUE;
+
+        netdev_low_level_set_status(netdev, RT_TRUE);
+        LOG_D("the network interface device(%s) set up status.", netdev->name);
+    }
+
+    return RT_EOK;
+}
+
+static int n58_netdev_set_down(struct netdev *netdev)
+{
+    struct at_device *device = RT_NULL;
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n58 device by netdev name(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    if (device->is_init == RT_TRUE)
+    {
+        n58_power_off(device);
+        device->is_init = RT_FALSE;
+
+        netdev_low_level_set_status(netdev, RT_FALSE);
+        LOG_D("the network interface device(%s) set down status.", netdev->name);
+    }
+
+    return RT_EOK;
+}
+
+static int n58_netdev_set_dns_server(struct netdev *netdev, uint8_t dns_num, ip_addr_t *dns_server)
+{
+#define N58_DNS_RESP_LEN 128
+#define N58_DNS_RESP_TIMEO rt_tick_from_millisecond(300)
+
+    int result = RT_EOK;
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+
+    RT_ASSERT(netdev);
+    RT_ASSERT(dns_server);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n58 device by netdev name(%s) failed.", netdev->name);
+    }
+
+    resp = at_create_resp(N58_DNS_RESP_LEN, 0, N58_DNS_RESP_TIMEO);
+    if (resp == RT_NULL)
+    {
+        LOG_D("n58 set dns server failed, no memory for response object.");
+        result = -RT_ENOMEM;
+        goto __exit;
+    }
+    LOG_D("dns_num:%d,dns_server:%s", dns_num, inet_ntoa(*dns_server));
+    /* send "AT+CDNSCFG=<pri_dns>[,<sec_dns>]" commond to set dns servers */
+    if (at_obj_exec_cmd(device->client, resp, "AT+DNSSERVER=%d,%s", dns_num + 1, inet_ntoa(*dns_server)) < 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    netdev_low_level_set_dns_server(netdev, dns_num, dns_server);
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+    result = -RT_ERROR;
+
+    return result;
+}
+
+#ifdef NETDEV_USING_PING
+static int n58_netdev_ping(struct netdev *netdev, const char *host,
+                           size_t data_len, uint32_t timeout, struct netdev_ping_resp *ping_resp)
+{
+#define N58_PING_RESP_SIZE 512
+#define N58_PING_IP_SIZE 16
+#define N58_PING_TIMEO (5 * RT_TICK_PER_SECOND)
+
+#define N58_PING_ERR_TIME 600
+#define N58_PING_ERR_TTL 255
+
+    int result = RT_EOK;
+    int bytes, time, ttl, i;
+    char ip_addr[N58_PING_IP_SIZE] = {0};
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+
+    RT_ASSERT(netdev);
+    RT_ASSERT(host);
+    RT_ASSERT(ping_resp);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n58 device by netdev name(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    for (i = 0; i < rt_strlen(host) && !isalpha(host[i]); i++)
+        ;
+
+    resp = at_create_resp(N58_PING_RESP_SIZE, 7, N58_PING_TIMEO);
+    if (resp == RT_NULL)
+    {
+        LOG_E("n58 device(%s) set dns server failed, no memory for response object.", device->name);
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    /* send "AT+PING=<ip>[,<timeout>,<size>,<num>]" commond to send ping request */
+    /* n58 ping <size> ranges of ipv4(36-1500), ipv6(56-1500) */
+    if (at_obj_exec_cmd(device->client, resp, "AT+PING=%s,%d,%d,1",
+                        host, N58_PING_TIMEO / (RT_TICK_PER_SECOND / 10), data_len + 4) < 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+    //Reply from 39.156.69.79: bytes= 36 time = 148(ms), TTL = 255
+    //Reply from %[^:]: bytes= %d time = %d(ms), TTL = %d
+    if (at_resp_parse_line_args_by_kw(resp, "Reply from ", "Reply from %[^:]: bytes= %d time = %d(ms), TTL = %d",
+                                      ip_addr, &bytes, &time, &ttl) <= 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    /* the ping request timeout expires, the response time settting to 600 and ttl setting to 255 */
+    if (time == N58_PING_ERR_TIME && ttl == N58_PING_ERR_TTL)
+    {
+        result = -RT_ETIMEOUT;
+        goto __exit;
+    }
+
+    inet_aton(ip_addr, &(ping_resp->ip_addr));
+    ping_resp->data_len = data_len;
+    ping_resp->ticks = time;
+    ping_resp->ttl = ttl;
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+#endif /* NETDEV_USING_PING */
+
+#ifdef NETDEV_USING_NETSTAT
+void n58_netdev_netstat(struct netdev *netdev)
+{
+    // TODO netstat support
+}
+#endif /* NETDEV_USING_NETSTAT */
+
+const struct netdev_ops n58_netdev_ops =
+    {
+        n58_netdev_set_up,
+        n58_netdev_set_down,
+
+        RT_NULL,                   /* not support set ip, netmask, gatway address */
+        n58_netdev_set_dns_server, //n58_netdev_set_dns_server,
+        RT_NULL,                   /* not support set DHCP status */
+
+#ifdef NETDEV_USING_PING
+        n58_netdev_ping,
+#endif
+#ifdef NETDEV_USING_NETSTAT
+        n58_netdev_netstat,
+#endif
+};
+
+static struct netdev *n58_netdev_add(const char *netdev_name)
+{
+#define n58_NETDEV_MTU 1500
+    struct netdev *netdev = RT_NULL;
+
+    RT_ASSERT(netdev_name);
+
+    netdev = (struct netdev *)rt_calloc(1, sizeof(struct netdev));
+    if (netdev == RT_NULL)
+    {
+        LOG_E("no memory for n58 device(%s) netdev structure.", netdev_name);
+        return RT_NULL;
+    }
+
+    netdev->mtu = n58_NETDEV_MTU;
+    netdev->ops = &n58_netdev_ops;
+
+#ifdef SAL_USING_AT
+    extern int sal_at_netdev_set_pf_info(struct netdev * netdev);
+    /* set the network interface socket/netdb operations */
+    sal_at_netdev_set_pf_info(netdev);
+#endif
+
+    netdev_register(netdev, netdev_name, RT_NULL);
+
+    return netdev;
+}
+
+/* =============================  n58 device operations ============================= */
+
+#define AT_SEND_CMD(client, resp, resp_line, timeout, cmd)                                      \
+    do                                                                                          \
+    {                                                                                           \
+        (resp) = at_resp_set_info((resp), 128, (resp_line), rt_tick_from_millisecond(timeout)); \
+        if (at_obj_exec_cmd((client), (resp), (cmd)) < 0)                                       \
+        {                                                                                       \
+            result = -RT_ERROR;                                                                 \
+            goto __exit;                                                                        \
+        }                                                                                       \
+    } while (0)
+
+/* init for n58 */
+static void n58_init_thread_entry(void *parameter)
+{
+#define INIT_RETRY 5
+#define CPIN_RETRY 10
+#define CSQ_RETRY 10
+#define CREG_RETRY 60
+#define CEREG_RETRY 30
+#define CCID_SIZE 20
+
+    int i, retry_num = INIT_RETRY;
+    char ccid[CCID_SIZE] = {0};
+    char parsed_data[10] = {0};
+    rt_err_t result = RT_EOK;
+    at_response_t resp = RT_NULL;
+    struct at_device *device = (struct at_device *)parameter;
+    struct at_client *client = device->client;
+
+    resp = at_create_resp(128, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for n58 device(%s) response structure.", device->name);
+        return;
+    }
+
+    while (retry_num--)
+    {
+        rt_memset(parsed_data, 0, sizeof(parsed_data));
+        rt_thread_mdelay(1000);
+        n58_power_on(device);
+        rt_thread_mdelay(5000); //check the n58 hardware manual, when we use the pow_key to start n58, it takes about 20s,so we put 25s here to ensure starting n58 normally.
+
+        LOG_I("start initializing the n58 device(%s)", device->name);
+        /* wait n58 startup finish */
+        if (at_client_obj_wait_connect(client, N58_WAIT_CONNECT_TIME))
+        {
+            result = -RT_ETIMEOUT;
+            goto __exit;
+        }
+
+        /* disable echo */
+        AT_SEND_CMD(client, resp, 0, 300, "ATE0");
+        /* get module version */
+        AT_SEND_CMD(client, resp, 0, 300, "ATI");
+        /* show module version */
+        for (i = 0; i < (int)resp->line_counts - 1; i++)
+        {
+            LOG_I("%s", at_resp_get_line(resp, i + 1));
+        }
+        /* check SIM card */
+        for (i = 0; i < CPIN_RETRY; i++)
+        {
+            at_resp_set_info(resp, 128, 2, 5 * RT_TICK_PER_SECOND);
+            if (at_obj_exec_cmd(client, resp, "AT+CCID") < 0)
+            {
+                LOG_E("AT+CCID ERROR! retry:%d.", i);
+                rt_thread_mdelay(1000);
+                continue;
+            }
+
+            if (at_resp_parse_line_args_by_kw(resp, "+CCID:", "+CCID: %s", ccid))
+            {
+                LOG_I("n58 device(%s) SIM card detection success.", device->name);
+                LOG_I("CCID: %s", ccid);
+                break;
+            }
+            rt_thread_mdelay(1000);
+        }
+        if (i == CPIN_RETRY)
+        {
+            LOG_E("n58 device(%s) SIM card detection failed.", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* waiting for dirty data to be digested */
+        rt_thread_mdelay(500);
+        LOG_I("register network!");
+        /* check the GSM network is registered */
+        for (i = 0; i < CREG_RETRY; i++)
+        {
+            AT_SEND_CMD(client, resp, 0, 1000, "AT+CREG?");
+            at_resp_parse_line_args_by_kw(resp, "+CREG:", "+CREG: %s", &parsed_data);
+            if (!strncmp(parsed_data, "0,1", sizeof(parsed_data)) ||
+                !strncmp(parsed_data, "0,5", sizeof(parsed_data)))
+            {
+                LOG_I("n58 device(%s) network is registered(%s),", device->name, parsed_data);
+                break;
+            }
+            rt_thread_mdelay(1000);
+            LOG_W("AT+CREG? Retry:%d", i);
+        }
+        if (i == CREG_RETRY)
+        {
+            LOG_E("n58 device(%s) network is register failed(%s).", device->name, parsed_data);
+            rt_thread_mdelay(10);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        /* check the GPRS network is registered */
+        for (i = 0; i < CEREG_RETRY; i++)
+        {
+            AT_SEND_CMD(client, resp, 0, 300, "AT+CEREG?");
+            at_resp_parse_line_args_by_kw(resp, "+CEREG:", "+CEREG: %s", &parsed_data);
+            if (!strncmp(parsed_data, "0,1", sizeof(parsed_data)) ||
+                !strncmp(parsed_data, "0,5", sizeof(parsed_data)))
+            {
+                LOG_I("n58 device(%s) GPRS network is registered(%s).", device->name, parsed_data);
+                break;
+            }
+            rt_thread_mdelay(1000);
+        }
+        if (i == CEREG_RETRY)
+        {
+            LOG_E("n58 device(%s) GPRS network is register failed(%s).", device->name, parsed_data);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* check signal strength */
+        for (i = 0; i < CSQ_RETRY; i++)
+        {
+            AT_SEND_CMD(client, resp, 0, 300, "AT+CSQ");
+            at_resp_parse_line_args_by_kw(resp, "+CSQ:", "+CSQ: %s", &parsed_data);
+            if (strncmp(parsed_data, "99,99", sizeof(parsed_data)))
+            {
+                LOG_I("n58 device(%s) signal strength: %s", device->name, parsed_data);
+                break;
+            }
+            rt_thread_mdelay(1000);
+        }
+        if (i == CSQ_RETRY)
+        {
+            LOG_E("n58 device(%s) signal strength check failed (%s)", device->name, parsed_data);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        AT_SEND_CMD(client, resp, 0, 300, "AT+COPS=3,0");
+        AT_SEND_CMD(client, resp, 0, 300, "AT+COPS?");
+        at_resp_parse_line_args_by_kw(resp, "+COPS:", "+COPS: %*[^\"]\"%[^\"]", &parsed_data);
+
+        if (rt_strcmp(parsed_data, "ChinaMobile") == 0)
+        {
+            /* "CMCC" */
+            LOG_I("n58 device(%s) network operator: %s", device->name, parsed_data);
+        }
+        else if (rt_strcmp(parsed_data, "ChinaUnicom") == 0)
+        {
+            /* "UNICOM" */
+            LOG_I("n58 device(%s) network operator: %s", device->name, parsed_data);
+        }
+        else if (rt_strcmp(parsed_data, "ChinaTelecom") == 0)
+        {
+            /* "CT" */
+            LOG_I("n58 device(%s) network operator: %s", device->name, parsed_data);
+        }
+        else
+        {
+            LOG_E("n58 device(%s) Unknown carrier:%s", device->name, parsed_data);
+        }
+        /* the device default response timeout is 150 seconds, but it set to 20 seconds is convenient to use. */
+        AT_SEND_CMD(client, resp, 0, 20 * 1000, "AT+XIIC=1");
+
+        AT_SEND_CMD(client, resp, 0, 300, "AT+XIIC?");
+        if (at_resp_get_line_by_kw(resp, "ERROR") != RT_NULL)
+        {
+            LOG_E("n58 device(%s) get the local address failed.", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        result = RT_EOK;
+
+        AT_SEND_CMD(client, resp, 0, 300, "AT+RECVMODE=1"); //set direct receive
+
+        rt_thread_mdelay(2000); //wait for the module to process
+
+    __exit:
+        if (result == RT_EOK)
+        {
+            break;
+        }
+        else
+        {
+            /* power off the n58 device */
+            n58_power_off(device);
+            rt_thread_mdelay(1000);
+
+            LOG_I("n58 device(%s) initialize retry...", device->name);
+        }
+    }
+
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    if (result == RT_EOK)
+    {
+        /* set network interface device status and address information */
+        n58_netdev_set_info(device->netdev);
+        n58_netdev_check_link_status(device->netdev);
+        LOG_I("n58 device(%s) network initialize success!", device->name);
+    }
+    else
+    {
+        LOG_E("n58 device(%s) network initialize failed(%d)!", device->name, result);
+    }
+}
+
+static int n58_net_init(struct at_device *device)
+{
+#ifdef AT_DEVICE_N58_INIT_ASYN
+    rt_thread_t tid;
+    tid = rt_thread_create("n58_net_init", n58_init_thread_entry, (void *)device,
+                           N58_THREAD_STACK_SIZE, N58_THREAD_PRIORITY, 20);
+    if (tid)
+    {
+        rt_thread_startup(tid);
+    }
+    else
+    {
+        LOG_E("create n58 device(%s) initialization thread failed.", device->name);
+        return -RT_ERROR;
+    }
+#else
+    n58_init_thread_entry(device);
+#endif /* AT_DEVICE_N58_INIT_ASYN */
+
+    return RT_EOK;
+}
+
+static void urc_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    RT_ASSERT(data);
+
+    LOG_I("URC data : %.*s", size, data);
+}
+
+/* n58 device URC table for the device control */
+static const struct at_urc urc_table[] =
+    {
+        {"+PBREADY", "\r\n", urc_func},
+        {"CLOSED", "\r\n", urc_func},
+};
+
+static int n58_init(struct at_device *device)
+{
+    struct at_device_n58 *n58 = (struct at_device_n58 *)device->user_data;
+
+    /* initialize AT client */
+    at_client_init(n58->client_name, n58->recv_line_num);
+
+    device->client = at_client_get(n58->client_name);
+    if (device->client == RT_NULL)
+    {
+        LOG_E("n58 device(%s) initialize failed, get AT client(%s) failed.", n58->device_name, n58->client_name);
+        return -RT_ERROR;
+    }
+
+    /* register URC data execution function  */
+    at_obj_set_urc_table(device->client, urc_table, sizeof(urc_table) / sizeof(urc_table[0]));
+
+#ifdef AT_USING_SOCKET
+    n58_socket_init(device);
+#endif
+
+    /* add n58 device to the netdev list */
+    device->netdev = n58_netdev_add(n58->device_name);
+    if (device->netdev == RT_NULL)
+    {
+        LOG_E("n58 device(%s) initialize failed, get network interface device failed.", n58->device_name);
+        return -RT_ERROR;
+    }
+
+    /* initialize n58 pin configuration */
+    if (n58->power_pin != -1)
+    {
+        rt_pin_mode(n58->power_pin, PIN_MODE_OUTPUT);
+    }
+
+    if (n58->power_status_pin != -1)
+    {
+        rt_pin_mode(n58->power_status_pin, PIN_MODE_INPUT);
+    }
+
+    /* initialize n58 device network */
+    return n58_netdev_set_up(device->netdev);
+}
+
+static int n58_deinit(struct at_device *device)
+{
+    return n58_netdev_set_down(device->netdev);
+}
+
+static int n58_reset(struct at_device *device)
+{
+    int result = RT_EOK;
+    struct at_client *client = device->client;
+
+/* n58 only poweroff cmd,not support reboot.*/
+/* use power pin reboot */
+#if (N58_SAMPLE_POWER_PIN != -1)
+    rt_pin_write(N58_SAMPLE_POWER_PIN, 0);
+    rt_thread_mdelay(500);
+    rt_pin_write(N58_SAMPLE_POWER_PIN, 1);
+
+    rt_thread_mdelay(1000);
+
+    /* waiting 10 seconds for n58 device reset */
+    device->is_init = RT_FALSE;
+    if (at_client_obj_wait_connect(client, N58_WAIT_CONNECT_TIME))
+    {
+        return -RT_ETIMEOUT;
+    }
+
+    /* initialize n58 device network */
+    n58_net_init(device);
+
+    device->is_init = RT_TRUE;
+#else
+    result = -RT_ERROR;
+#endif
+
+    return result;
+}
+
+static int n58_control(struct at_device *device, int cmd, void *arg)
+{
+    int result = -RT_ERROR;
+
+    RT_ASSERT(device);
+
+    switch (cmd)
+    {
+    case AT_DEVICE_CTRL_POWER_ON:
+    case AT_DEVICE_CTRL_POWER_OFF:
+    case AT_DEVICE_CTRL_LOW_POWER:
+    case AT_DEVICE_CTRL_SLEEP:
+    case AT_DEVICE_CTRL_WAKEUP:
+    case AT_DEVICE_CTRL_NET_CONN:
+    case AT_DEVICE_CTRL_NET_DISCONN:
+    case AT_DEVICE_CTRL_SET_WIFI_INFO:
+    case AT_DEVICE_CTRL_GET_SIGNAL:
+    case AT_DEVICE_CTRL_GET_GPS:
+    case AT_DEVICE_CTRL_GET_VER:
+        LOG_W("n58 not support the control command(%d).", cmd);
+        break;
+    case AT_DEVICE_CTRL_RESET:
+        result = n58_reset(device);
+        break;
+    default:
+        LOG_E("input error control command(%d).", cmd);
+        break;
+    }
+
+    return result;
+}
+
+const struct at_device_ops n58_device_ops =
+    {
+        n58_init,
+        n58_deinit,
+        n58_control,
+};
+
+static int n58_device_class_register(void)
+{
+    struct at_device_class *class = RT_NULL;
+
+    class = (struct at_device_class *)rt_calloc(1, sizeof(struct at_device_class));
+    if (class == RT_NULL)
+    {
+        LOG_E("no memory for n58 device class create.");
+        return -RT_ENOMEM;
+    }
+
+    /* fill n58 device class object */
+#ifdef AT_USING_SOCKET
+    n58_socket_class_register(class);
+#endif
+    class->device_ops = &n58_device_ops;
+
+    return at_device_class_register(class, AT_DEVICE_CLASS_N58);
+}
+INIT_DEVICE_EXPORT(n58_device_class_register);
+
+#endif /* AT_DEVICE_USING_N58 */

class/n58/at_device_n58.h

@@ -0,0 +1,66 @@
+/*
+ * File      : at_device_n58.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2020, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author            Notes
+ * 2020-05-22     shuobatian        first version
+ */
+
+#ifndef __AT_DEVICE_N58_H__
+#define __AT_DEVICE_N58_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdlib.h>
+
+#include <at_device.h>
+
+/* The maximum number of sockets supported by the N58 device */
+#define AT_DEVICE_N58_SOCKETS_NUM      4
+
+struct at_device_n58
+{     
+    char *device_name;
+    char *client_name;
+
+    int power_pin;
+    int power_status_pin;
+    size_t recv_line_num;
+    struct at_device device;
+
+    void *user_data;
+};
+
+#ifdef AT_USING_SOCKET
+
+/* n58 device socket initialize */
+int n58_socket_init(struct at_device *device);
+
+/* n58 device class socket register */
+int n58_socket_class_register(struct at_device_class *class);
+
+#endif /* AT_USING_SOCKET */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __AT_DEVICE_N58_H__ */

class/n58/at_socket_n58.c

@@ -0,0 +1,669 @@
+/*
+ * File      : at_socket_n58.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2020, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author            Notes
+ * 2020-05-22     shuobatian        first version
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <at_device_n58.h>
+
+#if !defined(AT_SW_VERSION_NUM) || AT_SW_VERSION_NUM < 0x10300
+#error "This AT Client version is older, please check and update latest AT Client!"
+#endif
+
+#define LOG_TAG "at.skt"
+#include <at_log.h>
+
+#if defined(AT_DEVICE_USING_N58) && defined(AT_USING_SOCKET)
+
+#define N58_MODULE_SEND_MAX_SIZE 1000
+
+/* set real event by current socket and current state */
+#define SET_EVENT(socket, event) (((socket + 1) << 16) | (event))
+
+/* AT socket event type */
+#define N58_EVENT_CONN_OK (1L << 0)
+#define N58_EVENT_SEND_OK (1L << 1)
+#define N58_EVENT_RECV_OK (1L << 2)
+#define N58_EVNET_CLOSE_OK (1L << 3)
+#define N58_EVENT_CONN_FAIL (1L << 4)
+#define N58_EVENT_SEND_FAIL (1L << 5)
+
+static at_evt_cb_t at_evt_cb_set[] = {
+    [AT_SOCKET_EVT_RECV] = NULL,
+    [AT_SOCKET_EVT_CLOSED] = NULL,
+};
+
+static int n58_socket_event_send(struct at_device *device, uint32_t event)
+{
+    return (int)rt_event_send(device->socket_event, event);
+}
+
+static int n58_socket_event_recv(struct at_device *device, uint32_t event, uint32_t timeout, rt_uint8_t option)
+{
+    int result = RT_EOK;
+    rt_uint32_t recved;
+
+    result = rt_event_recv(device->socket_event, event, option | RT_EVENT_FLAG_CLEAR, timeout, &recved);
+    if (result != RT_EOK)
+    {
+        return -RT_ETIMEOUT;
+    }
+
+    return recved;
+}
+
+/**
+ * close socket by AT commands.
+ *
+ * @param current socket
+ *
+ * @return  0: close socket success
+ *         -1: send AT commands error
+ *         -2: wait socket event timeout
+ *         -5: no memory
+ */
+static int n58_socket_close(struct at_socket *socket)
+{
+    uint32_t event = 0;
+    int result = RT_EOK;
+    int device_socket = (int)socket->user_data;
+    enum at_socket_type type_socket = socket->type;
+    struct at_device *device = (struct at_device *)socket->device;
+
+    /* clear socket close event */
+    event = SET_EVENT(device_socket, N58_EVNET_CLOSE_OK);
+    n58_socket_event_recv(device, event, 0, RT_EVENT_FLAG_OR);
+
+    if (type_socket == AT_SOCKET_TCP)
+    {
+        if (at_obj_exec_cmd(device->client, NULL, "AT+TCPCLOSE=%d", device_socket) < 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+    }
+    else if (type_socket == AT_SOCKET_UDP)
+    {
+        if (at_obj_exec_cmd(device->client, NULL, "AT+UDPCLOSE=%d", device_socket) < 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+    }
+
+    if (n58_socket_event_recv(device, event, rt_tick_from_millisecond(300 * 3), RT_EVENT_FLAG_AND) < 0)
+    {
+        LOG_E("n58 device(%s) socket(%d) close failed, wait close OK timeout.", device->name, device_socket);
+        result = -RT_ETIMEOUT;
+        goto __exit;
+    }
+
+__exit:
+    return result;
+}
+
+/**
+ * create TCP/UDP client or server connect by AT commands.
+ *
+ * @param socket current socket
+ * @param ip server or client IP address
+ * @param port server or client port
+ * @param type connect socket type(tcp, udp)
+ * @param is_client connection is client
+ *
+ * @return   0: connect success
+ *          -1: connect failed, send commands error or type error
+ *          -2: wait socket event timeout
+ *          -5: no memory
+ */
+static int n58_socket_connect(struct at_socket *socket, char *ip, int32_t port, enum at_socket_type type, rt_bool_t is_client)
+{
+    uint32_t event = 0;
+    rt_bool_t retryed = RT_FALSE;
+    at_response_t resp = RT_NULL;
+    int result = RT_EOK, event_result = 0;
+    int device_socket = (int)socket->user_data;
+    struct at_device *device = (struct at_device *)socket->device;
+
+    RT_ASSERT(ip);
+    RT_ASSERT(port >= 0);
+
+    resp = at_create_resp(128, 0, 5 * RT_TICK_PER_SECOND);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for n58 device(%s) response structure.", device->name);
+        return -RT_ENOMEM;
+    }
+
+__retry:
+
+    /* clear socket connect event */
+    event = SET_EVENT(device_socket, N58_EVENT_CONN_OK | N58_EVENT_CONN_FAIL);
+    n58_socket_event_recv(device, event, 0, RT_EVENT_FLAG_OR);
+
+    if (is_client)
+    {
+        switch (type)
+        {
+        case AT_SOCKET_TCP:
+            /* send AT commands(eg: AT+TCPSETUP=<n>,<ip>,<port>) to connect TCP server */
+            if (at_obj_exec_cmd(device->client, RT_NULL,
+                                "AT+TCPSETUP=%d,%s,%d", device_socket, ip, port) < 0)
+            {
+                result = -RT_ERROR;
+                goto __exit;
+            }
+            break;
+            /* send AT commands(eg: AT+UDPSETUP=<n>,<ip>,<port>) to connect TCP server */
+        case AT_SOCKET_UDP:
+            if (at_obj_exec_cmd(device->client, RT_NULL,
+                                "AT+UDPSETUP=%d,%s,%d", device_socket, ip, port) < 0)
+            {
+                result = -RT_ERROR;
+                goto __exit;
+            }
+            break;
+
+        default:
+            LOG_E("n58 device(%s) not supported connect type : %d.", device->name, type);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+    }
+
+    /* waiting result event from AT URC, the device default connection timeout is 75 seconds, but it set to 10 seconds is convenient to use */
+    if (n58_socket_event_recv(device, SET_EVENT(device_socket, 0), 10 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR) < 0)
+    {
+        LOG_E("n58 device(%s) socket(%d) connect failed, wait connect result timeout.", device->name, device_socket);
+        result = -RT_ETIMEOUT;
+        goto __exit;
+    }
+    /* waiting OK or failed result */
+    event_result = n58_socket_event_recv(device,
+                                         N58_EVENT_CONN_OK | N58_EVENT_CONN_FAIL, 1 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR);
+    if (event_result < 0)
+    {
+        LOG_E("n58 device(%s) socket(%d) connect failed, wait connect OK|FAIL timeout.", device->name, device_socket);
+        result = -RT_ETIMEOUT;
+        goto __exit;
+    }
+    /* check result */
+    if (event_result & N58_EVENT_CONN_FAIL)
+    {
+        if (retryed == RT_FALSE)
+        {
+            LOG_D("n58 device(%s) socket(%d) connect failed, maybe the socket was not be closed at the last time and now will retry.",
+                  device->name, device_socket);
+            if (n58_socket_close(socket) < 0)
+            {
+                result = -RT_ERROR;
+                goto __exit;
+            }
+            retryed = RT_TRUE;
+            goto __retry;
+        }
+        LOG_E("n58 device(%s) socket(%d) connect failed.", device->name, device_socket);
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+/**
+ * send data to server or client by AT commands.
+ *
+ * @param socket current socket
+ * @param buff send buffer
+ * @param bfsz send buffer size
+ * @param type connect socket type(tcp, udp)
+ *
+ * @return >=0: the size of send success
+ *          -1: send AT commands error or send data error
+ *          -2: waited socket event timeout
+ *          -5: no memory
+ */
+static int n58_socket_send(struct at_socket *socket, const char *buff, size_t bfsz, enum at_socket_type type)
+{
+    uint32_t event = 0;
+    int result = RT_EOK, event_result = 0;
+    size_t cur_pkt_size = 0, sent_size = 0;
+    at_response_t resp = RT_NULL;
+    int device_socket = (int)socket->user_data;
+    struct at_device *device = (struct at_device *)socket->device;
+    rt_mutex_t lock = device->client->lock;
+
+    RT_ASSERT(buff);
+
+    resp = at_create_resp(128, 2, 5 * RT_TICK_PER_SECOND);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for n58 device(%s) response structure.", device->name);
+        return -RT_ENOMEM;
+    }
+
+    rt_mutex_take(lock, RT_WAITING_FOREVER);
+
+    /* clear socket connect event */
+    event = SET_EVENT(device_socket, N58_EVENT_SEND_OK | N58_EVENT_SEND_FAIL);
+    n58_socket_event_recv(device, event, 0, RT_EVENT_FLAG_OR);
+
+    /* set AT client end sign to deal with '>' sign.*/
+    at_obj_set_end_sign(device->client, '>');
+
+    while (sent_size < bfsz)
+    {
+        if (bfsz - sent_size < N58_MODULE_SEND_MAX_SIZE)
+        {
+            cur_pkt_size = bfsz - sent_size;
+        }
+        else
+        {
+            cur_pkt_size = N58_MODULE_SEND_MAX_SIZE;
+        }
+
+        /* send the "AT+QISEND" commands to AT server than receive the '>' response on the first line. */
+        if (type == AT_SOCKET_TCP)
+        {
+            if (at_obj_exec_cmd(device->client, resp, "AT+TCPSEND=%d,%d", device_socket, cur_pkt_size) < 0)
+            {
+                result = -RT_ERROR;
+                goto __exit;
+            }
+        }
+        else if (type == AT_SOCKET_UDP)
+        {
+            if (at_obj_exec_cmd(device->client, resp, "AT+UDPSEND=%d,%d", device_socket, cur_pkt_size) < 0)
+            {
+                result = -RT_ERROR;
+                goto __exit;
+            }
+        }
+
+        /* send the real data to server or client */
+        result = (int)at_client_obj_send(device->client, buff + sent_size, cur_pkt_size);
+        if (result == 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* waiting result event from AT URC */
+        if (n58_socket_event_recv(device, SET_EVENT(device_socket, 0), 15 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR) < 0)
+        {
+            LOG_E("n58 device(%s) socket(%d) send failed, wait connect result timeout.", device->name, device_socket);
+            result = -RT_ETIMEOUT;
+            goto __exit;
+        }
+        /* waiting OK or failed result */
+        event_result = n58_socket_event_recv(device,
+                                             N58_EVENT_SEND_OK | N58_EVENT_SEND_FAIL, 5 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR);
+        if (event_result < 0)
+        {
+            LOG_E("n58 device(%s) socket(%d) send failed, wait connect OK|FAIL timeout.", device->name, device_socket);
+            result = -RT_ETIMEOUT;
+            goto __exit;
+        }
+        /* check result */
+        if (event_result & N58_EVENT_SEND_FAIL)
+        {
+            LOG_E("n58 device(%s) socket(%d) send failed.", device->name, device_socket);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        sent_size += cur_pkt_size;
+    }
+
+__exit:
+    /* reset the end sign for data conflict */
+    at_obj_set_end_sign(device->client, 0);
+
+    rt_mutex_release(lock);
+
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+/**
+ * domain resolve by AT commands.
+ *
+ * @param name domain name
+ * @param ip parsed IP address, it's length must be 16
+ *
+ * @return  0: domain resolve success
+ *         -1: send AT commands error or response error
+ *         -2: wait socket event timeout
+ *         -5: no memory
+ */
+static int n58_domain_resolve(const char *name, char ip[16])
+{
+#define RESOLVE_RETRY 5
+
+    int i, result = RT_EOK;
+    char recv_ip[16] = {0};
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+
+    RT_ASSERT(name);
+    RT_ASSERT(ip);
+
+    device = at_device_get_first_initialized();
+    if (device == RT_NULL)
+    {
+        LOG_E("get first initialization n58 device failed.");
+        return -RT_ERROR;
+    }
+
+    /* The maximum response time is 14 seconds, affected by network status */
+    resp = at_create_resp(128, 4, 14 * RT_TICK_PER_SECOND);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for n58 device(%s) response structure.", device->name);
+        return -RT_ENOMEM;
+    }
+
+    for (i = 0; i < RESOLVE_RETRY; i++)
+    {
+        int err_code = 0;
+
+        if (at_obj_exec_cmd(device->client, resp, "AT+CDNSGIP=\"%s\"", name) < 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* domain name prase error options */
+        if (at_resp_parse_line_args_by_kw(resp, "+CDNSGIP: 0", "+CDNSGIP: 0,%d", &err_code) > 0)
+        {
+            /* 3 - network error, 8 - dns common error */
+            if (err_code == 3 || err_code == 8)
+            {
+                result = -RT_ERROR;
+                goto __exit;
+            }
+        }
+
+        /* parse the third line of response data, get the IP address */
+        if (at_resp_parse_line_args_by_kw(resp, "+CDNSGIP:", "%*[^,],%*[^,],\"%[^\"]", recv_ip) < 0)
+        {
+            rt_thread_mdelay(100);
+            /* resolve failed, maybe receive an URC CRLF */
+            continue;
+        }
+
+        if (rt_strlen(recv_ip) < 8)
+        {
+            rt_thread_mdelay(100);
+            /* resolve failed, maybe receive an URC CRLF */
+            continue;
+        }
+        else
+        {
+            rt_thread_mdelay(10);
+            rt_strncpy(ip, recv_ip, 15);
+            ip[15] = '\0';
+            break;
+        }
+    }
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+/**
+ * set AT socket event notice callback
+ *
+ * @param event notice event
+ * @param cb notice callback
+ */
+static void n58_socket_set_event_cb(at_socket_evt_t event, at_evt_cb_t cb)
+{
+    if (event < sizeof(at_evt_cb_set) / sizeof(at_evt_cb_set[1]))
+    {
+        at_evt_cb_set[event] = cb;
+    }
+}
+
+static void urc_connect_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int device_socket = 0;
+    struct at_device *device = RT_NULL;
+    char *client_name = client->device->parent.name;
+    char constat[16] = {0};
+
+    RT_ASSERT(data && size);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n58 device by client name(%s) failed.", client_name);
+        return;
+    }
+
+    /* get the current socket by receive data */
+    sscanf(data, "%*[^ ]%d,%s", &device_socket, constat);
+
+    LOG_D("data:%s", data);
+
+    LOG_D("socket:%d,constat:%s", device_socket, constat);
+
+    if (strstr(constat, "OK"))
+    {
+        LOG_D("socket %d:connect ok!", device_socket);
+        n58_socket_event_send(device, SET_EVENT(device_socket, N58_EVENT_CONN_OK));
+    }
+    else if (strstr(constat, "FAIL"))
+    {
+        LOG_D("socket %d:connect fail!", device_socket);
+        n58_socket_event_send(device, SET_EVENT(device_socket, N58_EVENT_CONN_FAIL));
+    }
+}
+
+static void urc_send_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int device_socket = 0;
+    struct at_device *device = RT_NULL;
+    char *client_name = client->device->parent.name;
+
+    RT_ASSERT(data && size);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n58 device by client name(%s) failed.", client_name);
+        return;
+    }
+
+    /* get the current socket by receive data */
+    sscanf(data, "%*[^ ] %d,%*d\r\n", &device_socket);
+
+    if (rt_strstr(data, "OPERATION"))
+    {
+        LOG_E("input data timeout!");
+        n58_socket_event_send(device, SET_EVENT(device_socket, N58_EVENT_SEND_FAIL));
+    }
+    else if (rt_strstr(data, "ERROR")) //链路号错误
+    {
+        n58_socket_event_send(device, SET_EVENT(device_socket, N58_EVENT_SEND_FAIL));
+    }
+    else //没有错误就是成功
+    {
+        n58_socket_event_send(device, SET_EVENT(device_socket, N58_EVENT_SEND_OK));
+    }
+}
+
+static void urc_close_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int device_socket = 0;
+    struct at_device *device = RT_NULL;
+    char *client_name = client->device->parent.name;
+
+    RT_ASSERT(data && size);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n58 device by client name(%s) failed.", client_name);
+        return;
+    }
+
+    /* get the current socket by receive data */
+    /* +TCPCLOSE: 1,OK */
+    sscanf(data, "%*[^ ]%d,%*s", &device_socket);
+
+    if (rt_strstr(data, "OK"))
+    {
+        n58_socket_event_send(device, SET_EVENT(device_socket, N58_EVNET_CLOSE_OK));
+    }
+    else if (rt_strstr(data, "Link Closed"))
+    {
+        struct at_socket *socket = RT_NULL;
+
+        /* get AT socket object by device socket descriptor */
+        socket = &(device->sockets[device_socket]);
+
+        /* notice the socket is disconnect by remote */
+        if (at_evt_cb_set[AT_SOCKET_EVT_CLOSED])
+        {
+            at_evt_cb_set[AT_SOCKET_EVT_CLOSED](socket, AT_SOCKET_EVT_CLOSED, RT_NULL, 0);
+        }
+    }
+}
+
+static void urc_recv_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int device_socket = 0;
+    rt_size_t bfsz = 0;
+    int data_index = size - 1;
+    char *recv_buf = RT_NULL;
+    struct at_socket *socket = RT_NULL;
+    struct at_device *device = RT_NULL;
+    char *client_name = client->device->parent.name;
+
+    RT_ASSERT(data && size);
+
+    /* get the current socket and receive buffer size by receive data */
+    sscanf(data, "%*[^ ] %d,%d,", &device_socket, (int *)&bfsz);
+
+    recv_buf = (char *)rt_calloc(1, bfsz + 1);
+
+    if (recv_buf == RT_NULL)
+    {
+        LOG_E("no memory for n58 device(%s) URC receive buffer (%d).", device->name, bfsz);
+        return;
+    }
+
+    data_index -= 2; //"\r\n"移除
+    recv_buf[bfsz] = '\0';
+    for (int i = bfsz - 1; i >= 0; i--)
+    {
+        recv_buf[i] = data[data_index];
+        data_index--;
+    }
+
+    /* get receive timeout by receive buffer length */
+
+    LOG_D("recv socket:%d", device_socket);
+
+    if (device_socket < 0 || bfsz == 0)
+    {
+        return;
+    }
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get n58 device by client name(%s) failed.", client_name);
+        return;
+    }
+
+    /* get AT socket object by device socket descriptor */
+    socket = &(device->sockets[device_socket]);
+
+    /* notice the receive buffer and buffer size */
+    if (at_evt_cb_set[AT_SOCKET_EVT_RECV])
+    {
+        at_evt_cb_set[AT_SOCKET_EVT_RECV](socket, AT_SOCKET_EVT_RECV, recv_buf, bfsz);
+    }
+}
+
+/* n58 device URC table for the socket data */
+static const struct at_urc urc_table[] =
+    {
+
+        {"+TCPSETUP:", "\r\n", urc_connect_func},
+        {"+UDPSETUP:", "\r\n", urc_connect_func},
+        {"+TCPSEND:", "\r\n", urc_send_func},
+        {"+UDPSEND:", "\r\n", urc_send_func},
+        {"+TCPCLOSE:", "\r\n", urc_close_func},
+        {"+UDPCLOSE:", "\r\n", urc_close_func},
+        {"+TCPRECV:", "\r\n", urc_recv_func},
+        {"+UDPRECV:", "\r\n", urc_recv_func},
+
+};
+
+static const struct at_socket_ops n58_socket_ops =
+    {
+        n58_socket_connect,
+        n58_socket_close,
+        n58_socket_send,
+        n58_domain_resolve,
+        n58_socket_set_event_cb,
+};
+
+int n58_socket_init(struct at_device *device)
+{
+    RT_ASSERT(device);
+
+    /* register URC data execution function  */
+    at_obj_set_urc_table(device->client, urc_table, sizeof(urc_table) / sizeof(urc_table[0]));
+
+    return RT_EOK;
+}
+
+int n58_socket_class_register(struct at_device_class *class)
+{
+    RT_ASSERT(class);
+
+    class->socket_num = AT_DEVICE_N58_SOCKETS_NUM;
+    class->socket_ops = &n58_socket_ops;
+
+    return RT_EOK;
+}
+
+#endif /* AT_DEVICE_USING_n58 && AT_USING_SOCKET */

inc/at_device.h

@@ -60,6 +60,8 @@ extern "C" {
 #define AT_DEVICE_CLASS_M6315          0x0EU
 #define AT_DEVICE_CLASS_BC28           0x0FU
 #define AT_DEVICE_CLASS_EC200X         0x10U
+#define AT_DEVICE_CLASS_N21            0x11U
+#define AT_DEVICE_CLASS_N58            0x12U
 
 /* Options and Commands for AT device control opreations */
 #define AT_DEVICE_CTRL_POWER_ON        0x01L

samples/at_sample_n21.c

@@ -0,0 +1,53 @@
+/*
+ * File      : at_sample_n21.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2019-12-07     liang.shao     first version
+ */
+
+#include <at_device_n21.h>
+
+#define LOG_TAG                        "at.sample"
+#include <at_log.h>
+
+#define N21_SAMPLE_DEIVCE_NAME     "n21"
+
+static struct at_device_n21 sim0 =
+{
+    N21_SAMPLE_DEIVCE_NAME,
+    N21_SAMPLE_CLIENT_NAME,
+
+    N21_SAMPLE_POWER_PIN,
+    N21_SAMPLE_STATUS_PIN,
+    N21_SAMPLE_RECV_BUFF_LEN,
+};
+
+static int n21_device_register(void)
+{
+    struct at_device_n21 *n21 = &sim0;
+    
+    return at_device_register(&(n21->device),
+                              n21->device_name,
+                              n21->client_name,
+                              AT_DEVICE_CLASS_N21,
+                              (void *) n21);
+}
+INIT_APP_EXPORT(n21_device_register);
+//MSH_CMD_EXPORT(n21_device_register,n21_device_register);

samples/at_sample_n58.c

@@ -0,0 +1,53 @@
+/*
+ * File      : at_sample_n58.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-05-22     shuobatian     first version
+ */
+
+#include <at_device_n58.h>
+
+#define LOG_TAG                        "at.sample"
+#include <at_log.h>
+
+#define N58_SAMPLE_DEIVCE_NAME     "n58"
+
+static struct at_device_n58 sim0 =
+{
+    N58_SAMPLE_DEIVCE_NAME,
+    N58_SAMPLE_CLIENT_NAME,
+
+    N58_SAMPLE_POWER_PIN,
+    N58_SAMPLE_STATUS_PIN,
+    N58_SAMPLE_RECV_BUFF_LEN,
+};
+
+static int n58_device_register(void)
+{
+    struct at_device_n58 *n58 = &sim0;
+    
+    return at_device_register(&(n58->device),
+                              n58->device_name,
+                              n58->client_name,
+                              AT_DEVICE_CLASS_N58,
+                              (void *) n58);
+}
+INIT_APP_EXPORT(n58_device_register);
+//MSH_CMD_EXPORT(n58_device_register,n58_device_register);