ethernet: enable SNTP and timezone

The Ethernet path skipped the shared SNTP lifecycle, so it neither
applied the configured timezone nor synchronized the system clock.

Expose the helpers and initialize SNTP before bringing up the W5500
interface. Start it after the existing connection wait. The shared
configuration already selects the Ethernet IP event.

Author: stintel

main/net/ethernet.c

@@ -83,6 +83,8 @@ esp_err_t init_ethernet(void)
 {
     esp_err_t ret = ESP_OK;
 
+    init_sntp();
+
     // Start Ethernet
     if (lvgl_port_lock(lvgl_lock_timeout)) {
         lv_obj_clear_flag(lbl_ln4, LV_OBJ_FLAG_HIDDEN);
@@ -188,5 +190,7 @@ esp_err_t init_ethernet(void)
     // HACK
     vTaskDelay(5000 / portTICK_PERIOD_MS);
 
+    start_sntp();
+
     return ret;
 }

main/network.c

@@ -71,7 +71,7 @@ void set_hostname(esp_netif_t *netif, esp_mac_type_t mac_type)
     }
 }
 
-static esp_err_t init_sntp(void)
+esp_err_t init_sntp(void)
 {
     ESP_LOGI(TAG, "initializing SNTP client");
     esp_err_t ret = ESP_OK;
@@ -95,7 +95,7 @@ static esp_err_t init_sntp(void)
     return ret;
 }
 
-static esp_err_t start_sntp(void)
+esp_err_t start_sntp(void)
 {
     char *ntp_config = config_get_char("ntp_config", DEFAULT_NTP_CONFIG);
     if (strcmp(ntp_config, "DHCP") == 0) {

main/network.h

@@ -5,5 +5,7 @@ extern esp_netif_t *hdl_netif;
 
 esp_err_t init_wifi(const char *psk, const char *ssid);
 esp_err_t init_ethernet(void);
+esp_err_t init_sntp(void);
+esp_err_t start_sntp(void);
 void get_mac_address(void);
 void set_hostname(esp_netif_t *netif, esp_mac_type_t mac_type);