Wtahdog support added.

WLAN_Thermometer.ino

@@ -12,6 +12,7 @@
 #include <ESPDateTime.h>
 #include <Time.h>
 #include <DHT.h>
+#include <esp_task_wdt.h>
 
 #define MDNS_NAME             "wlanthermometer"
 #define AP_SSID_CONFIG_NAME   "WLANTHERMOMETER-Config"
@@ -33,6 +34,7 @@
 #define DHTTYPE               DHT22
 #define FIRST_MIN_MAX         300000  // = 5 min
 #define HTML_RELOAD_PAGE_SECS 30
+#define WDT_TIMEOUT           30
 
 LiquidCrystal_I2C lcd(LCD_I2C_ADDR, LCD_COL, LCD_ROW);
 looper sched;
@@ -62,6 +64,9 @@ void setup()
 {
   bool ap_reset_last_state;
 
+  esp_task_wdt_init(WDT_TIMEOUT, true);
+  esp_task_wdt_add(NULL);
+
   pinMode(AP_DATA_RESET_PIN, INPUT_PULLDOWN);
   pinMode(ONBOARD_LED, OUTPUT);
 
@@ -161,6 +166,7 @@ void setup()
   sched.addJob(show_time, KRATE_TIME);
   sched.addJob(check_reset_ap_data, KRATE_RESET_AP_DATA);
   sched.addJob(check_datetime, KRATE_CHECK_DATETIME);
+  sched.addJob(watchdog_reset, WDT_TIMEOUT / 2);
 
   get_sensor_data();
   temp[MIN] = temp[ACT];
@@ -590,3 +596,8 @@ void check_datetime(void)
     show_time();
   }
 }
+
+void watchdog_reset(void)
+{
+  esp_task_wdt_reset();
+}