Sync network time.

src/main.c

@@ -1,8 +1,10 @@
+#include "config.h"
+
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "wifi.h"
-
-#include "config.h"
+#include "esp_sntp.h"
+#include "esp_netif_sntp.h"
 
 #define LOG_LOCAL_LEVEL ESP_LOG_VERBOSE
 #include "esp_log.h"
@@ -11,7 +13,31 @@ static const char* TAG = "Main";
 void print_task(void *pvParameters) {
     while (1) {
         ESP_LOGI(TAG, "here");
-        vTaskDelay(pdMS_TO_TICKS(500));
+        vTaskDelay(pdMS_TO_TICKS(5000));
+    }
+}
+
+void sync_time() {
+    setenv("TZ", TIMEZONE, 1);
+    tzset();
+
+    ESP_LOGI(TAG, "Syncing time with NTP server...");
+    esp_sntp_config_t config = ESP_NETIF_SNTP_DEFAULT_CONFIG("pool.ntp.org");
+    esp_netif_sntp_init(&config);
+
+    if (esp_netif_sntp_sync_wait(pdMS_TO_TICKS(10000)) != ESP_OK) {
+        ESP_LOGE(TAG, "Failed to update system time within 10s timeout");
+    }
+
+    struct tm timeinfo;
+    time_t now;
+
+    time(&now);
+
+    if (localtime_r(&now, &timeinfo) != NULL) {
+        ESP_LOGI(TAG, "Time synchronized: %s", asctime(&timeinfo));
+    } else {
+        ESP_LOGE(TAG, "Failed to obtain time");
     }
 }
 
@@ -25,9 +51,10 @@ void app_main() {
 
     ESP_ERROR_CHECK(ret);
 
-    
     xTaskCreate(print_task, "print_task", 4096, NULL, 1, NULL);
     wifi_init_sta();
+    vTaskDelay(pdMS_TO_TICKS(1000)); // Wait for WiFi to connect and get IP
+    sync_time();
 
     vTaskDelete(NULL);
 }

src/wifi.c

@@ -1,5 +1,6 @@
 #include "wifi.h"
 #include "secrets.h"
+#include "config.h"
 
 /* WiFi station Example
 
@@ -51,10 +52,16 @@ void wifi_init_sta(void) {
     ESP_ERROR_CHECK(esp_netif_init());
 
     ESP_ERROR_CHECK(esp_event_loop_create_default());
-    esp_netif_create_default_wifi_sta();
+    esp_netif_t *sta_netif = esp_netif_create_default_wifi_sta();
 
     wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
     ESP_ERROR_CHECK(esp_wifi_init(&cfg));
+    
+#ifndef ESP_HOSTNAME
+#error "ESP_HOSTNAME is not defined in config.h"
+#endif
+
+    esp_err_t err = esp_netif_set_hostname(sta_netif, ESP_HOSTNAME);
 
     esp_event_handler_instance_t instance_any_id;
     esp_event_handler_instance_t instance_got_ip;
@@ -96,11 +103,11 @@ void wifi_init_sta(void) {
     /* 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 password:%s",
-                ESP_WIFI_SSID, ESP_WIFI_PASS);
+        ESP_LOGI(TAG, "connected to ap SSID:%s.",
+                ESP_WIFI_SSID);
     } else if (bits & WIFI_FAIL_BIT) {
-        ESP_LOGI(TAG, "Failed to connect to SSID:%s, password:%s",
-                ESP_WIFI_SSID, ESP_WIFI_PASS);
+        ESP_LOGI(TAG, "Failed to connect to SSID:%s.",
+                ESP_WIFI_SSID);
     } else {
         ESP_LOGE(TAG, "UNEXPECTED EVENT");
     }