Merge pull request #74 from qgyhd1234/esp32

【添加】添加esp32的适配

SConscript

@@ -31,6 +31,15 @@ if GetDepend(['AT_DEVICE_USING_ESP8266']):
     if GetDepend(['AT_DEVICE_ESP8266_SAMPLE']):
         src += Glob('samples/at_sample_esp8266.c')
 
+# ESP32
+if GetDepend(['AT_DEVICE_USING_ESP32']):
+    path += [cwd + '/class/esp32']
+    src += Glob('class/esp32/at_device_esp32.c')
+    if GetDepend(['AT_USING_SOCKET']):
+        src += Glob('class/esp32/at_socket_esp32.c')
+    if GetDepend(['AT_DEVICE_ESP32_SAMPLE']):
+        src += Glob('samples/at_sample_esp32.c')
+
 # MW31
 if GetDepend(['AT_DEVICE_USING_MW31']):
     path += [cwd + '/class/mw31']

class/esp32/at_device_esp32.c

@@ -0,0 +1,942 @@
+/*
+ * File      : at_socket_esp32.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
+ * 2019-10-26     zylx         first version
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <at_device_esp32.h>
+
+#define LOG_TAG                        "at.dev.esp"
+
+#include <at_log.h>
+
+#ifdef AT_DEVICE_USING_ESP32
+
+#define ESP32_WAIT_CONNECT_TIME      5000
+#define ESP32_THREAD_STACK_SIZE      2048
+#define ESP32_THREAD_PRIORITY        (RT_THREAD_PRIORITY_MAX / 2)
+
+/* =============================  esp32 network interface operations ============================= */
+
+static int esp32_netdev_set_dns_server(struct netdev *netdev, uint8_t dns_num, ip_addr_t *dns_server);
+
+static void esp32_get_netdev_info(struct rt_work *work, void *work_data)
+{
+#define AT_ADDR_LEN          32
+#define AT_ERR_DNS_SERVER    "255.255.255.255"
+#define AT_DEF_DNS_SERVER    "114.114.114.114"
+
+    at_response_t resp = RT_NULL;
+    char ip[AT_ADDR_LEN] = {0}, mac[AT_ADDR_LEN] = {0};
+    char gateway[AT_ADDR_LEN] = {0}, netmask[AT_ADDR_LEN] = {0};
+    char dns_server1[AT_ADDR_LEN] = {0}, dns_server2[AT_ADDR_LEN] = {0};
+    const char *resp_expr = "%*[^\"]\"%[^\"]\"";
+    const char *resp_dns = "+CIPDNS:%s";
+    ip_addr_t ip_addr;
+    rt_uint32_t mac_addr[6] = {0};
+    rt_uint32_t num = 0;
+    rt_uint8_t dhcp_stat = 0;
+    struct rt_delayed_work *delay_work = (struct rt_delayed_work *)work;
+    struct at_device *device = (struct at_device *)work_data;
+    struct netdev *netdev = device->netdev;
+    struct at_client *client = device->client;
+
+    if (delay_work)
+    {
+        rt_free(delay_work);
+    }
+
+    resp = at_create_resp(512, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return;
+    }
+
+    /* send mac addr query commond "AT+CIFSR" and wait response */
+    if (at_obj_exec_cmd(client, resp, "AT+CIFSR") < 0)
+    {
+        goto __exit;
+    }
+
+    if (at_resp_parse_line_args_by_kw(resp, "STAMAC", resp_expr, mac) <= 0)
+    {
+        LOG_E("%s device parse \"AT+CIFSR\" cmd error.", device->name);
+        goto __exit;
+    }
+
+    /* send addr info query commond "AT+CIPSTA?" and wait response */
+    if (at_obj_exec_cmd(client, resp, "AT+CIPSTA?") < 0)
+    {
+        LOG_E("%s device send \"AT+CIPSTA?\" cmd error.", device->name);
+        goto __exit;
+    }
+
+    if (at_resp_parse_line_args_by_kw(resp, "ip", resp_expr, ip) <= 0 ||
+            at_resp_parse_line_args_by_kw(resp, "gateway", resp_expr, gateway) <= 0 ||
+            at_resp_parse_line_args_by_kw(resp, "netmask", resp_expr, netmask) <= 0)
+    {
+        LOG_E("%s device prase \"AT+CIPSTA?\" cmd error.", device->name);
+        goto __exit;
+    }
+
+    /* set netdev info */
+    inet_aton(gateway, &ip_addr);
+    netdev_low_level_set_gw(netdev, &ip_addr);
+    inet_aton(netmask, &ip_addr);
+    netdev_low_level_set_netmask(netdev, &ip_addr);
+    inet_aton(ip, &ip_addr);
+    netdev_low_level_set_ipaddr(netdev, &ip_addr);
+    sscanf(mac, "%x:%x:%x:%x:%x:%x",
+            &mac_addr[0], &mac_addr[1], &mac_addr[2], &mac_addr[3], &mac_addr[4], &mac_addr[5]);
+    for (num = 0; num < netdev->hwaddr_len; num++)
+    {
+        netdev->hwaddr[num] = mac_addr[num];
+    }
+
+    /* send dns server query commond "AT+CIPDNS?" and wait response */
+    if (at_obj_exec_cmd(device->client, resp, "AT+CIPDNS?") < 0)
+    {
+        LOG_W("please check and update %s device firmware to support the \"AT+CIPDNS?\" cmd.", device->name);
+        goto __exit;
+    }
+
+    if (at_resp_parse_line_args(resp, 1, resp_dns, dns_server1) <= 0 &&
+            at_resp_parse_line_args(resp, 2, resp_dns, dns_server2) <= 0)
+    {
+        LOG_E("%s device prase \"AT+CIPDNS?\" cmd error.", device->name);
+        goto __exit;
+    }
+
+    /* set primary DNS server address */
+    if (rt_strlen(dns_server1) > 0 &&
+            rt_strncmp(dns_server1, AT_ERR_DNS_SERVER, rt_strlen(AT_ERR_DNS_SERVER)) != 0)
+    {
+        inet_aton(dns_server1, &ip_addr);
+        netdev_low_level_set_dns_server(netdev, 0, &ip_addr);
+    }
+    else
+    {
+        inet_aton(AT_DEF_DNS_SERVER, &ip_addr);
+        esp32_netdev_set_dns_server(netdev, 0, &ip_addr);
+    }
+
+    /* set secondary DNS server address */
+    if (rt_strlen(dns_server2) > 0 )
+    {
+        inet_aton(dns_server2, &ip_addr);
+        netdev_low_level_set_dns_server(netdev, 1, &ip_addr);
+    }
+
+    /* send DHCP query commond " AT+CWDHCP_CUR?" and wait response */
+    if (at_obj_exec_cmd(client, resp, "AT+CWDHCP?") < 0)
+    {
+        goto __exit;
+    }
+
+    /* parse response data, get the DHCP status */
+    if (at_resp_parse_line_args_by_kw(resp, "+CWDHCP:", "+CWDHCP:%d", &dhcp_stat) < 0)
+    {
+        LOG_E("%s device prase DHCP status error.", device->name);
+        goto __exit;
+    }
+
+    /* Bit0 - SoftAP DHCP status, Bit1 - Station DHCP status */
+    netdev_low_level_set_dhcp_status(netdev, dhcp_stat & 0x01 ? RT_TRUE : RT_FALSE);
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+}
+
+static int esp32_net_init(struct at_device *device);
+
+static int esp32_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 device(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    if (device->is_init == RT_FALSE)
+    {
+        esp32_net_init(device);
+        netdev_low_level_set_status(netdev, RT_TRUE);
+        LOG_D("network interface device(%s) set up status", netdev->name);
+    }
+
+    return RT_EOK;
+}
+
+static int esp32_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 device by netdev(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    if (device->is_init == RT_TRUE)
+    {
+        device->is_init = RT_FALSE;
+        netdev_low_level_set_status(netdev, RT_FALSE);
+        LOG_D("network interface device(%s) set down status", netdev->name);
+    }
+
+    return RT_EOK;
+}
+
+static int esp32_netdev_set_addr_info(struct netdev *netdev, ip_addr_t *ip_addr, ip_addr_t *netmask, ip_addr_t *gw)
+{
+#define IPADDR_RESP_SIZE       128
+#define IPADDR_SIZE            16
+
+    int result = RT_EOK;
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+    char ip_str[IPADDR_SIZE] = {0};
+    char gw_str[IPADDR_SIZE] = {0};
+    char netmask_str[IPADDR_SIZE] = {0};
+
+    RT_ASSERT(netdev);
+    RT_ASSERT(ip_addr || netmask || gw);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    resp = at_create_resp(IPADDR_RESP_SIZE, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        result = -RT_ENOMEM;
+        goto __exit;
+    }
+
+    /* Convert numeric IP address into decimal dotted ASCII representation. */
+    if (ip_addr)
+        rt_memcpy(ip_str, inet_ntoa(*ip_addr), IPADDR_SIZE);
+    else
+        rt_memcpy(ip_str, inet_ntoa(netdev->ip_addr), IPADDR_SIZE);
+
+    if (gw)
+        rt_memcpy(gw_str, inet_ntoa(*gw), IPADDR_SIZE);
+    else
+        rt_memcpy(gw_str, inet_ntoa(netdev->gw), IPADDR_SIZE);
+
+    if (netmask)
+        rt_memcpy(netmask_str, inet_ntoa(*netmask), IPADDR_SIZE);
+    else
+        rt_memcpy(netmask_str, inet_ntoa(netdev->netmask), IPADDR_SIZE);
+
+    /* send addr info set commond "AT+CIPSTA_CUR=<ip>[,<gateway>,<netmask>]" and wait response */
+    if (at_obj_exec_cmd(device->client, resp, "AT+CIPSTA_CUR=\"%s\",\"%s\",\"%s\"",
+                        ip_str, gw_str, netmask_str) < 0)
+    {
+        LOG_E("%s device set address failed.", device->name);
+        result = -RT_ERROR;
+    }
+    else
+    {
+        /* Update netdev information */
+        if (ip_addr)
+            netdev_low_level_set_ipaddr(netdev, ip_addr);
+
+        if (gw)
+            netdev_low_level_set_gw(netdev, gw);
+
+        if (netmask)
+            netdev_low_level_set_netmask(netdev, netmask);
+
+        LOG_D("%s device set address success.", device->name);
+    }
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+static int esp32_netdev_set_dns_server(struct netdev *netdev, uint8_t dns_num, ip_addr_t *dns_server)
+{
+#define DNS_RESP_SIZE           128
+
+    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 device by netdev(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    resp = at_create_resp(DNS_RESP_SIZE, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return -RT_ENOMEM;
+    }
+
+    /* send dns server set commond "AT+CIPDNS_CUR=<enable>[,<DNS	server0>,<DNS	server1>]" and wait response */
+    if (at_obj_exec_cmd(device->client, resp, "AT+CIPDNS_CUR=1,\"%s\"", inet_ntoa(*dns_server)) < 0)
+    {
+        LOG_E("%s device set DNS failed.", device->name);
+        result = -RT_ERROR;
+    }
+    else
+    {
+        netdev_low_level_set_dns_server(netdev, dns_num, dns_server);
+        LOG_D("%s device set DNS(%s) success.", device->name, inet_ntoa(*dns_server));
+    }
+
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+static int esp32_netdev_set_dhcp(struct netdev *netdev, rt_bool_t is_enabled)
+{
+#define ESP32_STATION     1
+#define RESP_SIZE           128
+
+    int result = RT_EOK;
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+
+    RT_ASSERT(netdev);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device by netdev(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    resp = at_create_resp(RESP_SIZE, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp struct.");
+        return -RT_ENOMEM;
+    }
+
+    /* send dhcp set commond "AT+CWDHCP_CUR=<mode>,<en>" and wait response */
+    if (at_obj_exec_cmd(device->client, resp, "AT+CWDHCP_CUR=%d,%d", ESP32_STATION, is_enabled) < 0)
+    {
+        LOG_E("%s device set DHCP status(%d) failed.", device->name, is_enabled);
+        result = -RT_ERROR;
+        goto __exit;
+    }
+    else
+    {
+        netdev_low_level_set_dhcp_status(netdev, is_enabled);
+        LOG_D("%s device set DHCP status(%d) ok.", device->name, is_enabled);
+    }
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+#ifdef NETDEV_USING_PING
+static int esp32_netdev_ping(struct netdev *netdev, const char *host,
+                size_t data_len, uint32_t timeout, struct netdev_ping_resp *ping_resp)
+{
+#define ESP32_PING_IP_SIZE         16
+
+    rt_err_t result = RT_EOK;
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+    char ip_addr[ESP32_PING_IP_SIZE] = {0};
+    int req_time;
+
+    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 device(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    resp = at_create_resp(64, 0, timeout);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return -RT_ENOMEM;
+    }
+
+    /* send domain commond "AT+CIPDOMAIN=<domain name>" and wait response */
+    if (at_obj_exec_cmd(device->client, resp, "AT+CIPDOMAIN=\"%s\"", host) < 0)
+    {
+        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, "+CIPDOMAIN:", "+CIPDOMAIN:%s", ip_addr) < 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    /* send ping commond "AT+PING=<IP>" and wait response */
+    if (at_obj_exec_cmd(device->client, resp, "AT+PING=\"%s\"", host) < 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    if (at_resp_parse_line_args_by_kw(resp, "+", "+PING:%d", &req_time) < 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    if (req_time)
+    {
+        inet_aton(ip_addr, &(ping_resp->ip_addr));
+        ping_resp->data_len = data_len;
+        ping_resp->ttl = 0;
+        ping_resp->ticks = req_time;
+    }
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+#endif /* NETDEV_USING_PING */
+
+#ifdef NETDEV_USING_NETSTAT
+void esp32_netdev_netstat(struct netdev *netdev)
+{
+#define ESP32_NETSTAT_RESP_SIZE         320
+#define ESP32_NETSTAT_TYPE_SIZE         4
+#define ESP32_NETSTAT_IPADDR_SIZE       17
+#define ESP32_NETSTAT_EXPRESSION        "+CIPSTATUS:%*d,\"%[^\"]\",\"%[^\"]\",%d,%d,%*d"
+
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+    int remote_port, local_port, i;
+    char *type = RT_NULL;
+    char *ipaddr = RT_NULL;
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", netdev->name);
+        return;
+    }
+
+    type = (char *) rt_calloc(1, ESP32_NETSTAT_TYPE_SIZE);
+    ipaddr = (char *) rt_calloc(1, ESP32_NETSTAT_IPADDR_SIZE);
+    if ((type && ipaddr) == RT_NULL)
+    {
+        LOG_E("no memory for ipaddr create.");
+        goto __exit;
+    }
+
+    resp = at_create_resp(ESP32_NETSTAT_RESP_SIZE, 0, 5 * RT_TICK_PER_SECOND);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.", device->name);
+        goto __exit;
+    }
+
+    /* send network connection information commond "AT+CIPSTATUS" and wait response */
+    if (at_obj_exec_cmd(device->client, resp, "AT+CIPSTATUS") < 0)
+    {
+        goto __exit;
+    }
+
+    for (i = 1; i <= resp->line_counts; i++)
+    {
+        if (strstr(at_resp_get_line(resp, i), "+CIPSTATUS"))
+        {
+            /* parse the third line of response data, get the network connection information */
+            if (at_resp_parse_line_args(resp, i, ESP32_NETSTAT_EXPRESSION, type, ipaddr, &remote_port, &local_port) < 0)
+            {
+                goto __exit;
+            }
+            else
+            {
+                LOG_RAW("%s: %s:%d ==> %s:%d\n", type, inet_ntoa(netdev->ip_addr), local_port, ipaddr, remote_port);
+            }
+        }
+    }
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    if (type)
+    {
+        rt_free(type);
+    }
+
+    if (ipaddr)
+    {
+        rt_free(ipaddr);
+    }
+}
+#endif /* NETDEV_USING_NETSTAT */
+
+static const struct netdev_ops esp32_netdev_ops =
+{
+    esp32_netdev_set_up,
+    esp32_netdev_set_down,
+
+    esp32_netdev_set_addr_info,
+    esp32_netdev_set_dns_server,
+    esp32_netdev_set_dhcp,
+
+#ifdef NETDEV_USING_PING
+    esp32_netdev_ping,
+#endif
+#ifdef NETDEV_USING_NETSTAT
+    esp32_netdev_netstat,
+#endif
+};
+
+static struct netdev *esp32_netdev_add(const char *netdev_name)
+{
+#define ETHERNET_MTU        1500
+#define HWADDR_LEN          6
+    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 netdev create.");
+        return RT_NULL;
+    }
+
+    netdev->mtu = ETHERNET_MTU;
+    netdev->ops = &esp32_netdev_ops;
+    netdev->hwaddr_len = HWADDR_LEN;
+
+#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;
+}
+
+/* =============================  esp32 device operations ============================= */
+
+#define AT_SEND_CMD(client, resp, cmd)                                     \
+    do {                                                                   \
+        (resp) = at_resp_set_info((resp), 256, 0, 5 * RT_TICK_PER_SECOND); \
+        if (at_obj_exec_cmd((client), (resp), (cmd)) < 0)                  \
+        {                                                                  \
+            result = -RT_ERROR;                                            \
+            goto __exit;                                                   \
+        }                                                                  \
+    } while(0)                                                             \
+
+static void esp32_netdev_start_delay_work(struct at_device *device)
+{
+    struct rt_delayed_work *net_work = RT_NULL;
+    net_work = (struct rt_delayed_work *)rt_calloc(1, sizeof(struct rt_delayed_work));
+    if (net_work == RT_NULL)
+    {
+        return;
+    }
+
+    rt_delayed_work_init(net_work, esp32_get_netdev_info, (void *)device);
+    rt_work_submit(&(net_work->work), RT_TICK_PER_SECOND);
+}
+
+static void esp32_init_thread_entry(void *parameter)
+{
+#define INIT_RETRY    5
+
+    struct at_device *device = (struct at_device *) parameter;
+    struct at_device_esp32 *esp32 = (struct at_device_esp32 *) device->user_data;
+    struct at_client *client = device->client;
+    at_response_t resp = RT_NULL;
+    rt_err_t result = RT_EOK;
+    rt_size_t i = 0, retry_num = INIT_RETRY;
+    rt_bool_t wifi_is_conn = RT_FALSE;
+
+    LOG_D("%s device initialize start.", device->name);
+
+    /* wait esp32 device startup finish */
+    if (at_client_obj_wait_connect(client, ESP32_WAIT_CONNECT_TIME))
+    {
+        return;
+    }
+
+    resp = at_create_resp(128, 0, 5 * RT_TICK_PER_SECOND);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return;
+    }
+
+    while (retry_num--)
+    {
+        /* reset module */
+        AT_SEND_CMD(client, resp, "AT+RST");
+        /* reset waiting delay */
+        rt_thread_mdelay(1000);
+        /* disable echo */
+        AT_SEND_CMD(client, resp, "ATE0");
+        /* set current mode to Wi-Fi station */
+        AT_SEND_CMD(client, resp, "AT+CWMODE=1");
+        /* get module version */
+        AT_SEND_CMD(client, resp, "AT+GMR");
+        /* show module version */
+        for (i = 0; i < resp->line_counts - 1; i++)
+        {
+            LOG_D("%s", at_resp_get_line(resp, i + 1));
+        }
+
+        AT_SEND_CMD(client, resp, "AT+CIPMUX=1");
+
+        /* initialize successfully  */
+        result = RT_EOK;
+        break;
+
+    __exit:
+        if (result != RT_EOK)
+        {
+            rt_thread_mdelay(1000);
+            LOG_I("%s device initialize retry...", device->name);
+        }
+    }
+
+    /* connect to WiFi AP */
+    if (at_obj_exec_cmd(client, at_resp_set_info(resp, 512, 0, 20 * RT_TICK_PER_SECOND),
+                        "AT+CWJAP=\"%s\",\"%s\"", esp32->wifi_ssid, esp32->wifi_password) != RT_EOK)
+    {
+        LOG_W("%s device wifi connect failed, check ssid(%s) and password(%s).",
+              device->name, esp32->wifi_ssid, esp32->wifi_password);
+    }
+    else
+    {
+        wifi_is_conn = RT_TRUE;
+    }
+
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    if (result != RT_EOK)
+    {
+        netdev_low_level_set_status(device->netdev, RT_FALSE);
+        LOG_E("%s device network initialize failed(%d).", device->name, result);
+    }
+    else
+    {
+        device->is_init = RT_TRUE;
+        netdev_low_level_set_status(device->netdev, RT_TRUE);
+        if (wifi_is_conn)
+        {
+            netdev_low_level_set_link_status(device->netdev, RT_TRUE);
+        }
+        esp32_netdev_start_delay_work(device);
+        LOG_I("%s device network initialize successfully.", device->name);
+    }
+}
+
+static int esp32_net_init(struct at_device *device)
+{
+#ifdef AT_DEVICE_ESP32_INIT_ASYN
+    rt_thread_t tid;
+
+    tid = rt_thread_create("esp_net", esp32_init_thread_entry, (void *) device,
+            ESP32_THREAD_STACK_SIZE, ESP32_THREAD_PRIORITY, 20);
+    if (tid)
+    {
+        rt_thread_startup(tid);
+    }
+    else
+    {
+        LOG_E("create %s device init thread failed.", device->name);
+        return -RT_ERROR;
+    }
+#else
+    esp32_init_thread_entry(device);
+#endif /* AT_DEVICE_ESP32_INIT_ASYN */
+
+    return RT_EOK;
+}
+
+static void urc_busy_p_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    LOG_D("system is processing a commands...");
+}
+
+static void urc_busy_s_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    LOG_D("system is sending data...");
+}
+
+static void urc_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    struct at_device *device = RT_NULL;
+    char *client_name = client->device->parent.name;
+
+    RT_ASSERT(client && data && size);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", client_name);
+        return;
+    }
+
+    if (rt_strstr(data, "WIFI CONNECTED"))
+    {
+        LOG_I("%s device wifi is connected.", device->name);
+
+        if (device->is_init)
+        {
+            netdev_low_level_set_link_status(device->netdev, RT_TRUE);
+
+            esp32_netdev_start_delay_work(device);
+        }
+    }
+    else if (rt_strstr(data, "WIFI DISCONNECT"))
+    {
+        LOG_I("%s device wifi is disconnect.", device->name);
+
+        if (device->is_init)
+        {
+            netdev_low_level_set_link_status(device->netdev, RT_FALSE);
+        }
+    }
+}
+
+static const struct at_urc urc_table[] =
+{
+    {"busy p",           "\r\n",           urc_busy_p_func},
+    {"busy s",           "\r\n",           urc_busy_s_func},
+    {"WIFI CONNECTED",   "\r\n",           urc_func},
+    {"WIFI DISCONNECT",  "\r\n",           urc_func},
+};
+
+static int esp32_init(struct at_device *device)
+{
+    struct at_device_esp32 *esp32 = (struct at_device_esp32 *) device->user_data;
+
+    /* initialize AT client */
+    at_client_init(esp32->client_name, esp32->recv_line_num);
+
+    device->client = at_client_get(esp32->client_name);
+    if (device->client == RT_NULL)
+    {
+        LOG_E("get AT client(%s) failed.", esp32->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
+    esp32_socket_init(device);
+#endif
+
+    /* add esp32 device to the netdev list */
+    device->netdev = esp32_netdev_add(esp32->device_name);
+    if (device->netdev == RT_NULL)
+    {
+        LOG_E("add netdev(%s) failed.", esp32->device_name);
+        return -RT_ERROR;
+    }
+
+    /* initialize esp32 device network */
+    return esp32_netdev_set_up(device->netdev);
+}
+
+static int esp32_deinit(struct at_device *device)
+{
+    return esp32_netdev_set_down(device->netdev);
+}
+
+/* reset eap8266 device and initialize device network again */
+static int esp32_reset(struct at_device *device)
+{
+    int result = RT_EOK;
+    struct at_client *client = device->client;
+
+    /* send "AT+RST" commonds to esp32 device */
+    result = at_obj_exec_cmd(client, RT_NULL, "AT+RST");
+    rt_thread_mdelay(1000);
+
+    /* waiting 10 seconds for esp32 device reset */
+    device->is_init = RT_FALSE;
+    if (at_client_obj_wait_connect(client, ESP32_WAIT_CONNECT_TIME))
+    {
+        return -RT_ETIMEOUT;
+    }
+
+    /* initialize esp32 device network */
+    esp32_net_init(device);
+
+    device->is_init = RT_TRUE;
+
+    return result;
+}
+
+/* change eap8266 wifi ssid and password information */
+static int esp32_wifi_info_set(struct at_device *device, struct at_device_ssid_pwd *info)
+{
+    int result = RT_EOK;
+    struct at_response *resp = RT_NULL;
+
+    if (info->ssid == RT_NULL || info->password == RT_NULL)
+    {
+        LOG_E("input wifi ssid(%s) and password(%s) error.", info->ssid, info->password);
+        return -RT_ERROR;
+    }
+
+    resp = at_create_resp(128, 0, 20 * RT_TICK_PER_SECOND);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return -RT_ENOMEM;
+    }
+
+    /* connect to input wifi ap */
+    if (at_obj_exec_cmd(device->client, resp, "AT+CWJAP=\"%s\",\"%s\"", info->ssid, info->password) != RT_EOK)
+    {
+        LOG_E("%s device wifi connect failed, check ssid(%s) and password(%s).",
+              device->name, info->ssid, info->password);
+        result = -RT_ERROR;
+    }
+
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+static int esp32_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_GET_SIGNAL:
+    case AT_DEVICE_CTRL_GET_GPS:
+    case AT_DEVICE_CTRL_GET_VER:
+        LOG_W("not support the control cmd(%d).", cmd);
+        break;
+    case AT_DEVICE_CTRL_RESET:
+        result = esp32_reset(device);
+        break;
+    case AT_DEVICE_CTRL_SET_WIFI_INFO:
+        result = esp32_wifi_info_set(device, (struct at_device_ssid_pwd *) arg);
+        break;
+    default:
+        LOG_E("input error control cmd(%d).", cmd);
+        break;
+    }
+
+    return result;
+}
+
+static const struct at_device_ops esp32_device_ops =
+{
+    esp32_init,
+    esp32_deinit,
+    esp32_control,
+};
+
+static int esp32_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 class create.");
+        return -RT_ENOMEM;
+    }
+
+    /* fill ESP32 device class object */
+#ifdef AT_USING_SOCKET
+    esp32_socket_class_register(class);
+#endif
+    class->device_ops = &esp32_device_ops;
+
+    return at_device_class_register(class, AT_DEVICE_CLASS_ESP32);
+}
+INIT_DEVICE_EXPORT(esp32_device_class_register);
+
+#endif /* AT_DEVICE_USING_ESP32 */

class/esp32/at_device_esp32.h

@@ -0,0 +1,66 @@
+/*
+ * File      : at_device_esp32.h
+ * 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
+ * 2019-05-16     chenyong     first version
+ */
+
+#ifndef __AT_DEVICE_ESP32_H__
+#define __AT_DEVICE_ESP32_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdlib.h>
+
+#include <at_device.h>
+
+/* The maximum number of sockets supported by the esp32 device */
+#define AT_DEVICE_ESP32_SOCKETS_NUM  5
+
+struct at_device_esp32
+{
+    char *device_name;
+    char *client_name;
+
+    char *wifi_ssid;
+    char *wifi_password;
+    size_t recv_line_num;
+    struct at_device device;
+
+    void *user_data;
+};
+
+#ifdef AT_USING_SOCKET
+
+/* esp32 device socket initialize */
+int esp32_socket_init(struct at_device *device);
+
+/* esp32 device class socket register */
+int esp32_socket_class_register(struct at_device_class *class);
+
+#endif /* AT_USING_SOCKET */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __AT_DEVICE_ESP32_H__ */

class/esp32/at_socket_esp32.c

@@ -0,0 +1,556 @@
+/*
+ * File      : at_socket_esp32.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
+ * 2018-06-20     chenyong     first version
+ * 2019-05-09     chenyong     multi AT socket client support
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <at_device_esp32.h>
+
+#define LOG_TAG                       "at.skt.esp"
+#include <at_log.h>
+
+#if defined(AT_DEVICE_USING_ESP32) && defined(AT_USING_SOCKET)
+
+#define ESP32_MODULE_SEND_MAX_SIZE   2048
+/* set real event by current socket and current state */
+#define SET_EVENT(socket, event)       (((socket + 1) << 16) | (event))
+
+/* AT socket event type */
+#define ESP32_EVENT_CONN_OK          (1L << 0)
+#define ESP32_EVENT_SEND_OK          (1L << 1)
+#define ESP32_EVENT_RECV_OK          (1L << 2)
+#define ESP32_EVNET_CLOSE_OK         (1L << 3)
+#define ESP32_EVENT_CONN_FAIL        (1L << 4)
+#define ESP32_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 esp32_socket_event_send(struct at_device *device, uint32_t event)
+{
+    return (int) rt_event_send(device->socket_event, event);
+}
+
+static int esp32_socket_event_recv(struct at_device *device, uint32_t event, uint32_t timeout, rt_uint8_t option)
+{
+    int result = 0;
+    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 esp32_socket_close(struct at_socket *socket)
+{
+    int result = RT_EOK;
+    at_response_t resp = RT_NULL;
+    int device_socket = (int) socket->user_data;
+    struct at_device *device = (struct at_device *) socket->device;
+
+    resp = at_create_resp(64, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return -RT_ENOMEM;
+    }
+
+    result = at_obj_exec_cmd(device->client, resp, "AT+CIPCLOSE=%d", device_socket);
+
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    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 esp32_socket_connect(struct at_socket *socket, char *ip, int32_t port, enum at_socket_type type, rt_bool_t is_client)
+{
+    int result = RT_EOK;
+    rt_bool_t retryed = RT_FALSE;
+    at_response_t resp = RT_NULL;
+    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 resp create.");
+        return -RT_ENOMEM;
+    }
+
+__retry:
+    if (is_client)
+    {
+        switch (type)
+        {
+        case AT_SOCKET_TCP:
+            /* send AT commands to connect TCP server */
+            if (at_obj_exec_cmd(device->client, resp,
+                                "AT+CIPSTART=%d,\"TCP\",\"%s\",%d,60", device_socket, ip, port) < 0)
+            {
+                result = -RT_ERROR;
+            }
+            break;
+
+        case AT_SOCKET_UDP:
+            if (at_obj_exec_cmd(device->client, resp,
+                                "AT+CIPSTART=%d,\"UDP\",\"%s\",%d", device_socket, ip, port) < 0)
+            {
+                result = -RT_ERROR;
+            }
+            break;
+
+        default:
+            LOG_E("not supported connect type %d.", type);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+    }
+
+    if (result != RT_EOK && retryed == RT_FALSE)
+    {
+        LOG_D("%s device socket (%d) connect failed, the socket was not be closed and now will connect retry.",
+                device->name, device_socket);
+        if (esp32_socket_close(socket) < 0)
+        {
+            goto __exit;
+        }
+        retryed = RT_TRUE;
+        result = RT_EOK;
+        goto __retry;
+    }
+
+__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 esp32_socket_send(struct at_socket *socket, const char *buff, size_t bfsz, enum at_socket_type type)
+{
+    int result = RT_EOK;
+    int 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;
+    struct at_device_esp32 *esp32 = (struct at_device_esp32 *) device->user_data;
+    rt_mutex_t lock = device->client->lock;
+
+    RT_ASSERT(buff);
+    RT_ASSERT(bfsz > 0);
+
+    resp = at_create_resp(128, 2, 5 * RT_TICK_PER_SECOND);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return -RT_ENOMEM;
+    }
+
+    rt_mutex_take(lock, RT_WAITING_FOREVER);
+
+    /* set current socket for send URC event */
+    esp32->user_data = (void *) device_socket;
+
+    /* set AT client end sign to deal with '>' sign */
+    at_obj_set_end_sign(device->client, '>');
+
+    while (sent_size < bfsz)
+    {
+        if (bfsz - sent_size < ESP32_MODULE_SEND_MAX_SIZE)
+        {
+            cur_pkt_size = bfsz - sent_size;
+        }
+        else
+        {
+            cur_pkt_size = ESP32_MODULE_SEND_MAX_SIZE;
+        }
+
+        /* send the "AT+CIPSEND" commands to AT server than receive the '>' response on the first line */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CIPSEND=%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 (esp32_socket_event_recv(device, SET_EVENT(device_socket, 0),
+                                      10 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR) < 0)
+        {
+            LOG_E("%s device socket(%d) wait connect result timeout.", device->name, device_socket);
+            result = -RT_ETIMEOUT;
+            goto __exit;
+        }
+        /* waiting OK or failed result */
+        event_result = esp32_socket_event_recv(device, ESP32_EVENT_SEND_OK | ESP32_EVENT_SEND_FAIL,
+                                                 5 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR);
+        if (event_result < 0)
+        {
+            LOG_E("%s device socket(%d) wait connect OK|FAIL timeout.", device->name, device_socket);
+            result = -RT_ETIMEOUT;
+            goto __exit;
+        }
+        /* check result */
+        if (event_result & ESP32_EVENT_SEND_FAIL)
+        {
+            LOG_E("%s device 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 */
+    at_obj_set_end_sign(device->client, 0);
+
+    rt_mutex_release(lock);
+
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result > 0 ? sent_size : 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
+ *         -2: wait socket event timeout
+ *         -5: no memory
+ */
+static int esp32_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 init device failed.");
+        return -RT_ERROR;
+    }
+
+    resp = at_create_resp(128, 0, 20 * RT_TICK_PER_SECOND);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return -RT_ENOMEM;
+    }
+
+    for (i = 0; i < RESOLVE_RETRY; i++)
+    {
+        if (at_obj_exec_cmd(device->client, resp, "AT+CIPDOMAIN=\"%s\"", name) < 0)
+        {
+            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, "+CIPDOMAIN:", "+CIPDOMAIN:%s", 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_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 esp32_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 const struct at_socket_ops esp32_socket_ops =
+{
+    esp32_socket_connect,
+    esp32_socket_close,
+    esp32_socket_send,
+    esp32_domain_resolve,
+    esp32_socket_set_event_cb,
+};
+
+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;
+    struct at_device_esp32 *esp32 = 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 device(%s) failed.", client_name);
+        return;
+    }
+    esp32 = (struct at_device_esp32 *) device->user_data;
+    device_socket = (int) esp32->user_data;
+
+    if (rt_strstr(data, "SEND OK"))
+    {
+        esp32_socket_event_send(device, SET_EVENT(device_socket, ESP32_EVENT_SEND_OK));
+    }
+    else if (rt_strstr(data, "SEND FAIL"))
+    {
+        esp32_socket_event_send(device, SET_EVENT(device_socket, ESP32_EVENT_SEND_FAIL));
+    }
+}
+
+static void urc_send_bfsz_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    static int cur_send_bfsz = 0;
+
+    RT_ASSERT(data && size);
+
+    sscanf(data, "Recv %d bytes", &cur_send_bfsz);
+}
+
+static void urc_close_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int index = 0;
+    struct at_socket *socket = RT_NULL;
+    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 device(%s) failed.", client_name);
+        return;
+    }
+
+    sscanf(data, "%d,CLOSED", &index);
+    socket = &(device->sockets[index]);
+
+    /* 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_int32_t timeout = 0;
+    rt_size_t bfsz = 0, temp_size = 0;
+    char *recv_buf = RT_NULL, temp[8] = {0};
+    struct at_socket *socket = RT_NULL;
+    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 device(%s) failed.", client_name);
+        return;
+    }
+
+    /* get the at deveice socket and receive buffer size by receive data */
+    sscanf(data, "+IPD,%d,%d:", &device_socket, (int *) &bfsz);
+
+    /* set receive timeout by receive buffer length, not less than 10ms */
+    timeout = bfsz > 10 ? bfsz : 10;
+
+    if (device_socket < 0 || bfsz == 0)
+        return;
+
+    recv_buf = (char *) rt_calloc(1, bfsz);
+    if (recv_buf == RT_NULL)
+    {
+        LOG_E("no memory receive buffer(%d).", bfsz);
+        /* read and clean the coming data */
+        while (temp_size < bfsz)
+        {
+            if (bfsz - temp_size > sizeof(temp))
+            {
+                at_client_obj_recv(client, temp, sizeof(temp), timeout);
+            }
+            else
+            {
+                at_client_obj_recv(client, temp, bfsz - temp_size, timeout);
+            }
+            temp_size += sizeof(temp);
+        }
+        return;
+    }
+
+    /* sync receive data */
+    if (at_client_obj_recv(client, recv_buf, bfsz, timeout) != bfsz)
+    {
+        LOG_E("%s device receive size(%d) data failed.", device->name, bfsz);
+        rt_free(recv_buf);
+        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);
+    }
+}
+
+static const struct at_urc urc_table[] =
+{
+    {"SEND OK",          "\r\n",           urc_send_func},
+    {"SEND FAIL",        "\r\n",           urc_send_func},
+    {"Recv",             "bytes\r\n",      urc_send_bfsz_func},
+    {"",                 ",CLOSED\r\n",    urc_close_func},
+    {"+IPD",             ":",              urc_recv_func},
+};
+
+int esp32_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 esp32_socket_class_register(struct at_device_class *class)
+{
+    RT_ASSERT(class);
+
+    class->socket_num = AT_DEVICE_ESP32_SOCKETS_NUM;
+    class->socket_ops = &esp32_socket_ops;
+
+    return RT_EOK;
+}
+
+#endif /* AT_DEVICE_USING_ESP32 && AT_USING_SOCKET */

inc/at_device.h

@@ -51,6 +51,7 @@ extern "C" {
 #define AT_DEVICE_CLASS_SIM76XX        0x05U
 #define AT_DEVICE_CLASS_RW007          0x06U
 #define AT_DEVICE_CLASS_MW31           0x07U
+#define AT_DEVICE_CLASS_ESP32          0x08U
 
 /* Options and Commands for AT device control opreations */
 #define AT_DEVICE_CTRL_POWER_ON        0x01L

samples/at_sample_esp32.c

@@ -0,0 +1,52 @@
+/*
+ * File      : at_sample_esp32.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
+ * 2019-05-10     chenyong     first version
+ */
+
+#include <at_device_esp32.h>
+
+#define LOG_TAG                        "at.sample.esp"
+#include <at_log.h>
+
+#define ESP32_SAMPLE_DEIVCE_NAME     "esp0"
+
+static struct at_device_esp32 esp0 =
+{
+    ESP32_SAMPLE_DEIVCE_NAME,
+    ESP32_SAMPLE_CLIENT_NAME,
+
+    ESP32_SAMPLE_WIFI_SSID,
+    ESP32_SAMPLE_WIFI_PASSWORD,
+    ESP32_SAMPLE_RECV_BUFF_LEN,
+};
+
+static int esp32_device_register(void)
+{
+    struct at_device_esp32 *esp32 = &esp0;
+
+    return at_device_register(&(esp32->device),
+                              esp32->device_name,
+                              esp32->client_name,
+                              AT_DEVICE_CLASS_ESP32,
+                              (void *) esp32);
+}
+INIT_APP_EXPORT(esp32_device_register);