fetch current time via NTP

firmware/fiatlux.c

@@ -1,18 +1,17 @@
+#include <FreeRTOS.h>
+#include <task.h>
+#include <esp/uart.h>
+#include <espressif/esp_common.h>
+
 #include "system.h"
 #include "wifi.h"
 #include "web.h"
 #include "mqtt.h"
 #include "lux.h"
 
-#include <stdio.h>
-#include <FreeRTOS.h>
-#include <task.h>
 
-#include <espressif/esp_common.h>
-#include <esp/uart.h>
 
-void user_init(void)
-{
+void user_init(void) {
     uart_set_baud(0, 115200);
     printf("SDK version: %s\n", sdk_system_get_sdk_version());
 
@@ -27,4 +26,6 @@ void user_init(void)
     xTaskCreate(&httpd_task, "httpd_task", 1024, NULL, 2, NULL);
 
     xTaskCreate(&lux_task, "lux_task", 512, NULL, 1, NULL);
+
+    xTaskCreate(&sntp_task, "sntp_task", 512, NULL, 2, NULL);
 }

firmware/system.c

@@ -10,7 +10,6 @@
 #include <sysparam.h>
 #include <spiflash.h>
 
-#include <espressif/user_interface.h>
 #include <espressif/esp_system.h>
 #include <rboot/rboot.h>
 #include <rboot-ota/rboot-api.h>

firmware/wifi.cpp

@@ -10,11 +10,13 @@
 #include <FreeRTOS.h>
 #include <task.h>
 #include <sockets.h>
+#include <time.h>
 
 extern "C" {
 #include <sysparam.h>
 #include <lwipopts.h>
 #include <espressif/user_interface.h>
+#include <sntp.h>
 }
 
 #include <espressif/esp_wifi.h>
@@ -357,5 +359,22 @@ extern "C" void wifi_task(void *pvParameters) {
     xSemaphoreGive(wifi_available_semaphore);
 
     //monitor loop connection here
+    vTaskDelete(nullptr);
+}
+
+const char *servers[] = {"0.pool.ntp.org", "1.pool.ntp.org", "2.pool.ntp.org", "3.pool.ntp.org"};
+const struct timezone tz = {1 * 60, DST_NONE}; // DST_MET would actually be correct, but the SDK has a bug and doesn't handle it correctly
+
+extern "C" void sntp_task(void *pvParameters) {
+    (void) pvParameters;
+
+    while (sdk_wifi_station_get_connect_status() != STATION_GOT_IP) {
+        vTaskDelay(1000 / portTICK_PERIOD_MS);
+    }
+
+    sntp_set_update_delay(5 * 60000);
+    sntp_initialize(&tz);
+    sntp_set_servers(servers, sizeof(servers) / sizeof(char *));
+
     vTaskDelete(nullptr);
 }

firmware/wifi.h

@@ -16,6 +16,8 @@ extern SemaphoreHandle_t wifi_available_semaphore;
 
 void wifi_task(void *pvParameters);
 
+void sntp_task(void *pvParameters);
+
 #ifdef __cplusplus
 }
 #endif