/* * wifi.c * * Created on: 21 Apr 2020 * Author: Chris */ #include "wifi.h" #define WIFI_CONNECTED_BIT BIT0 #define WIFI_FAIL_BIT BIT1 static EventGroupHandle_t s_wifi_event_group; static const char *TAG = "wifi station"; static int s_retry_num = 0; static void event_handler(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data) { if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) { esp_wifi_connect(); } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) { if (s_retry_num < CONFIG_ESP_WIFI_RETRIES) { esp_wifi_connect(); s_retry_num++; ESP_LOGI(TAG, "retry to connect to the AP"); } else { xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT); } ESP_LOGI(TAG,"connect to the AP fail"); } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) { ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data; ESP_LOGI(TAG, "got ip:%s", ip4addr_ntoa(&event->ip_info.ip)); s_retry_num = 0; xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT); } } void wifi_init_sta() { //Initialize NVS esp_err_t ret = nvs_flash_init(); if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) { ESP_ERROR_CHECK(nvs_flash_erase()); ret = nvs_flash_init(); } ESP_ERROR_CHECK(ret); s_wifi_event_group = xEventGroupCreate(); tcpip_adapter_init(); ESP_ERROR_CHECK(esp_event_loop_create_default()); wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT(); ESP_ERROR_CHECK(esp_wifi_init(&cfg)); //tcpip_adapter_dhcpc_stop(TCPIP_ADAPTER_IF_STA); //tcpip_adapter_ip_info_t info; //ip4_addr_t gw; //gw.addr = ipaddr_addr("192.168.0.1"); //info.gw = gw; //ip4_addr_t ip; //ip.addr = ipaddr_addr("192.168.0.110"); //info.ip = ip; //ip4_addr_t netmask; //netmask.addr = ipaddr_addr("255.255.255.0"); //info.netmask = netmask; //tcpip_adapter_sta_start(0, &info); ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL)); ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL)); wifi_config_t wifi_config = { .sta = { .ssid = CONFIG_ESP_WIFI_SSID, .password = CONFIG_ESP_WIFI_PASSWORD }, }; ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA) ); ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config) ); ESP_ERROR_CHECK(esp_wifi_start() ); ESP_LOGI(TAG, "wifi_init_sta finished."); /* Waiting until either the connection is established (WIFI_CONNECTED_BIT) or connection failed for the maximum * number of re-tries (WIFI_FAIL_BIT). The bits are set by event_handler() (see above) */ EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group, WIFI_CONNECTED_BIT | WIFI_FAIL_BIT, pdFALSE, pdFALSE, portMAX_DELAY); //tcpip_adapter_set_ip_info(TCPIP_ADAPTER_IF_STA, &info); /* xEventGroupWaitBits() returns the bits before the call returned, hence we can test which event actually * happened. */ if (bits & WIFI_CONNECTED_BIT) { ESP_LOGI(TAG, "connected to ap SSID:%s", CONFIG_ESP_WIFI_SSID); } else if (bits & WIFI_FAIL_BIT) { ESP_LOGI(TAG, "Failed to connect to SSID:%s", CONFIG_ESP_WIFI_SSID); } else { ESP_LOGE(TAG, "UNEXPECTED EVENT"); } //ESP_ERROR_CHECK(esp_event_handler_unregister(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler)); //ESP_ERROR_CHECK(esp_event_handler_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler)); //vEventGroupDelete(s_wifi_event_group); }