add pppos client restart in example

Closes https://github.com/espressif/esp-idf/issues/4268

examples/protocols/pppos_client/README.md

@@ -52,7 +52,7 @@ See the [Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/l
 
 ## Example Output
 
-The example will get module and operator's information after start up, and then go into PPP mode to start mqtt client operations. This example will also send a short message to someone's phone if you have enabled this feature in menuconfig.
+The example will get module and operator's information after start up, and then go into PPP mode to start mqtt client operations. This example will also send a short message to someone's phone if you have enabled this feature in menuconfig. The PPP connection will get restarted after 60 seconds.
 
 ### BG96 Output
 

examples/protocols/pppos_client/main/pppos_client_main.c

@@ -167,7 +167,7 @@ static esp_err_t mqtt_event_handler(esp_mqtt_event_handle_t event)
 }
 
 static void on_ppp_changed(void *arg, esp_event_base_t event_base,
-                        int32_t event_id, void *event_data)
+                           int32_t event_id, void *event_data)
 {
     ESP_LOGI(TAG, "PPP state changed event %d", event_id);
     if (event_id == NETIF_PPP_ERRORUSER) {
@@ -179,7 +179,7 @@ static void on_ppp_changed(void *arg, esp_event_base_t event_base,
 
 
 static void on_ip_event(void *arg, esp_event_base_t event_base,
-                      int32_t event_id, void *event_data)
+                        int32_t event_id, void *event_data)
 {
     ESP_LOGD(TAG, "IP event! %d", event_id);
     if (event_id == IP_EVENT_PPP_GOT_IP) {
@@ -227,11 +227,6 @@ void app_main(void)
 
     event_group = xEventGroupCreate();
 
-    // Init netif object
-    esp_netif_config_t cfg = ESP_NETIF_DEFAULT_PPP();
-    esp_netif_t *esp_netif = esp_netif_new(&cfg);
-    assert(esp_netif);
-
     /* create dte object */
     esp_modem_dte_config_t config = ESP_MODEM_DTE_DEFAULT_CONFIG();
     /* setup UART specific configuration based on kconfig options */
@@ -245,67 +240,85 @@ void app_main(void)
     config.event_queue_size = CONFIG_EXAMPLE_MODEM_UART_EVENT_QUEUE_SIZE;
     config.event_task_stack_size = CONFIG_EXAMPLE_MODEM_UART_EVENT_TASK_STACK_SIZE;
     config.event_task_priority = CONFIG_EXAMPLE_MODEM_UART_EVENT_TASK_PRIORITY;
-    config.line_buffer_size = CONFIG_EXAMPLE_MODEM_UART_RX_BUFFER_SIZE/2;
+    config.line_buffer_size = CONFIG_EXAMPLE_MODEM_UART_RX_BUFFER_SIZE / 2;
+
     modem_dte_t *dte = esp_modem_dte_init(&config);
     /* Register event handler */
     ESP_ERROR_CHECK(esp_modem_set_event_handler(dte, modem_event_handler, ESP_EVENT_ANY_ID, NULL));
-    /* create dce object */
+
+    // Init netif object
+    esp_netif_config_t cfg = ESP_NETIF_DEFAULT_PPP();
+    esp_netif_t *esp_netif = esp_netif_new(&cfg);
+    assert(esp_netif);
+
+    void *modem_netif_adapter = esp_modem_netif_setup(dte);
+    esp_modem_netif_set_default_handlers(modem_netif_adapter, esp_netif);
+
+    while (1) {
+        modem_dce_t *dce = NULL;
+        /* create dce object */
 #if CONFIG_EXAMPLE_MODEM_DEVICE_SIM800
-    modem_dce_t *dce = sim800_init(dte);
+        dce = sim800_init(dte);
 #elif CONFIG_EXAMPLE_MODEM_DEVICE_BG96
-    modem_dce_t *dce = bg96_init(dte);
+        dce = bg96_init(dte);
 #else
 #error "Unsupported DCE"
 #endif
-    assert(dce != NULL);
-    ESP_ERROR_CHECK(dce->set_flow_ctrl(dce, MODEM_FLOW_CONTROL_NONE));
-    ESP_ERROR_CHECK(dce->store_profile(dce));
-    /* Print Module ID, Operator, IMEI, IMSI */
-    ESP_LOGI(TAG, "Module: %s", dce->name);
-    ESP_LOGI(TAG, "Operator: %s", dce->oper);
-    ESP_LOGI(TAG, "IMEI: %s", dce->imei);
-    ESP_LOGI(TAG, "IMSI: %s", dce->imsi);
-    /* Get signal quality */
-    uint32_t rssi = 0, ber = 0;
-    ESP_ERROR_CHECK(dce->get_signal_quality(dce, &rssi, &ber));
-    ESP_LOGI(TAG, "rssi: %d, ber: %d", rssi, ber);
-    /* Get battery voltage */
-    uint32_t voltage = 0, bcs = 0, bcl = 0;
-    ESP_ERROR_CHECK(dce->get_battery_status(dce, &bcs, &bcl, &voltage));
-    ESP_LOGI(TAG, "Battery voltage: %d mV", voltage);
-    /* setup PPPoS network parameters */
+        assert(dce != NULL);
+        ESP_ERROR_CHECK(dce->set_flow_ctrl(dce, MODEM_FLOW_CONTROL_NONE));
+        ESP_ERROR_CHECK(dce->store_profile(dce));
+        /* Print Module ID, Operator, IMEI, IMSI */
+        ESP_LOGI(TAG, "Module: %s", dce->name);
+        ESP_LOGI(TAG, "Operator: %s", dce->oper);
+        ESP_LOGI(TAG, "IMEI: %s", dce->imei);
+        ESP_LOGI(TAG, "IMSI: %s", dce->imsi);
+        /* Get signal quality */
+        uint32_t rssi = 0, ber = 0;
+        ESP_ERROR_CHECK(dce->get_signal_quality(dce, &rssi, &ber));
+        ESP_LOGI(TAG, "rssi: %d, ber: %d", rssi, ber);
+        /* Get battery voltage */
+        uint32_t voltage = 0, bcs = 0, bcl = 0;
+        ESP_ERROR_CHECK(dce->get_battery_status(dce, &bcs, &bcl, &voltage));
+        ESP_LOGI(TAG, "Battery voltage: %d mV", voltage);
+        /* setup PPPoS network parameters */
 #if !defined(CONFIG_EXAMPLE_MODEM_PPP_AUTH_NONE) && (defined(CONFIG_LWIP_PPP_PAP_SUPPORT) || defined(CONFIG_LWIP_PPP_CHAP_SUPPORT))
-    esp_netif_ppp_set_auth(esp_netif, auth_type, CONFIG_EXAMPLE_MODEM_PPP_AUTH_USERNAME, CONFIG_EXAMPLE_MODEM_PPP_AUTH_PASSWORD);
+        esp_netif_ppp_set_auth(esp_netif, auth_type, CONFIG_EXAMPLE_MODEM_PPP_AUTH_USERNAME, CONFIG_EXAMPLE_MODEM_PPP_AUTH_PASSWORD);
 #endif
-    void *modem_netif_adapter = esp_modem_netif_setup(dte);
-    esp_modem_netif_set_default_handlers(modem_netif_adapter, esp_netif);
-    /* attach the modem to the network interface */
-    esp_netif_attach(esp_netif, modem_netif_adapter);
-    /* Wait for IP address */
-    xEventGroupWaitBits(event_group, CONNECT_BIT, pdTRUE, pdTRUE, portMAX_DELAY);
-    /* Config MQTT */
-    esp_mqtt_client_config_t mqtt_config = {
-        .uri = BROKER_URL,
-        .event_handle = mqtt_event_handler,
-    };
-    esp_mqtt_client_handle_t mqtt_client = esp_mqtt_client_init(&mqtt_config);
-    esp_mqtt_client_start(mqtt_client);
-    xEventGroupWaitBits(event_group, GOT_DATA_BIT, pdTRUE, pdTRUE, portMAX_DELAY);
-    esp_mqtt_client_destroy(mqtt_client);
-    /* Exit PPP mode */
-    ESP_ERROR_CHECK(esp_modem_stop_ppp(dte));
+        /* attach the modem to the network interface */
+        esp_netif_attach(esp_netif, modem_netif_adapter);
+        /* Wait for IP address */
+        xEventGroupWaitBits(event_group, CONNECT_BIT, pdTRUE, pdTRUE, portMAX_DELAY);
+
+        /* Config MQTT */
+        esp_mqtt_client_config_t mqtt_config = {
+            .uri = BROKER_URL,
+            .event_handle = mqtt_event_handler,
+        };
+        esp_mqtt_client_handle_t mqtt_client = esp_mqtt_client_init(&mqtt_config);
+        esp_mqtt_client_start(mqtt_client);
+        xEventGroupWaitBits(event_group, GOT_DATA_BIT, pdTRUE, pdTRUE, portMAX_DELAY);
+        esp_mqtt_client_destroy(mqtt_client);
+
+        /* Exit PPP mode */
+        ESP_ERROR_CHECK(esp_modem_stop_ppp(dte));
+
+        xEventGroupWaitBits(event_group, STOP_BIT, pdTRUE, pdTRUE, portMAX_DELAY);
+#if CONFIG_EXAMPLE_SEND_MSG
+        const char *message = "Welcome to ESP32!";
+        ESP_ERROR_CHECK(example_send_message_text(dce, CONFIG_EXAMPLE_SEND_MSG_PEER_PHONE_NUMBER, message));
+        ESP_LOGI(TAG, "Send send message [%s] ok", message);
+#endif
+        /* Power down module */
+        ESP_ERROR_CHECK(dce->power_down(dce));
+        ESP_LOGI(TAG, "Power down");
+        ESP_ERROR_CHECK(dce->deinit(dce));
+
+        ESP_LOGI(TAG, "Restart after 60 seconds");
+        vTaskDelay(pdMS_TO_TICKS(60000));
+    }
+
     /* Destroy the netif adapter withe events, which internally frees also the esp-netif instance */
     esp_modem_netif_clear_default_handlers(modem_netif_adapter);
     esp_modem_netif_teardown(modem_netif_adapter);
-    xEventGroupWaitBits(event_group, STOP_BIT, pdTRUE, pdTRUE, portMAX_DELAY);
-#if CONFIG_EXAMPLE_SEND_MSG
-    const char *message = "Welcome to ESP32!";
-    ESP_ERROR_CHECK(example_send_message_text(dce, CONFIG_EXAMPLE_SEND_MSG_PEER_PHONE_NUMBER, message));
-    ESP_LOGI(TAG, "Send send message [%s] ok", message);
-#endif
-    /* Power down module */
-    ESP_ERROR_CHECK(dce->power_down(dce));
-    ESP_LOGI(TAG, "Power down");
-    ESP_ERROR_CHECK(dce->deinit(dce));
     ESP_ERROR_CHECK(dte->deinit(dte));
 }