96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
#include "esp_event.h"
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#include "esp_log.h"
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#include "esp_wifi.h"
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#include "freertos/task.h"
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#include "secrets.h"
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static const char *TAG = "wifi"; // Logs are coming from this wifi module
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static uint32_t WIFI_CONNECTED = 0;
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static int s_retry_num = 0;
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#define MAX_RETRY 5
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static void wifi_event_handler(void *arg, esp_event_base_t event_base,
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int32_t event_id, void *event_data)
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{
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if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START)
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{
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esp_wifi_connect();
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}
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if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED)
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{
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if (s_retry_num < MAX_RETRY)
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{
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esp_wifi_connect();
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s_retry_num++;
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ESP_LOGI(TAG, "Trying to reconnect to WiFi.");
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}
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else
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{
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ESP_LOGI(TAG, "Could not connect to WiFi. Giving up.");
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}
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}
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if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP)
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{
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s_retry_num = 0;
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WIFI_CONNECTED = 1;
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}
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}
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void wifi_connect(void)
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{
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ESP_LOGI(TAG, "Attempting to connect to WiFi");
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// Initialise network interface layer (Internet Layer) once Link Layer
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// established (in standard TCP/IP architecture)
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ESP_ERROR_CHECK(esp_netif_init());
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// Create default event dispatcher
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ESP_ERROR_CHECK(esp_event_loop_create_default());
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// Having established interface layer, create an interface instance
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esp_netif_create_default_wifi_sta();
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// Initialise WiFi driver (Link Layer)
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wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
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ESP_ERROR_CHECK(esp_wifi_init(&cfg));
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ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID,
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&wifi_event_handler, NULL));
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ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, ESP_EVENT_ANY_ID,
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&wifi_event_handler, NULL));
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wifi_config_t wifi_config = {
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.sta =
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{
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.ssid = SECRETS_WIFI_SSID,
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.password = SECRETS_WIFI_PASS,
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},
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};
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// Set WiFi mode to 'station' (basically a client connecting to a WiFi access
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// point)
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ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
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// Give connection config to WiFi driver
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ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &wifi_config));
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// Begin the connection which triggers WIFI_EVENT_STA_START (the event which
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// is the basis for the actual connection defined in the event handler)
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ESP_ERROR_CHECK(esp_wifi_start());
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// Block main execution until WiFi connection est
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ESP_LOGI(TAG, "Waiting for WiFi connection...");
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while (!WIFI_CONNECTED)
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{
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vTaskDelay(pdMS_TO_TICKS(100));
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}
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}
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