Fixes and onboard LED blink.

WLAN_Thermometer.ino

@@ -23,7 +23,8 @@
 #define KRATE_TEMP            5000
 #define KRATE_TIME            500
 #define MEDIAN_SAMPLES        60
-
+#define ONBOARD_LED           2
+#define NTP_TIMEOUT           15000
 void check_mode(void);
 
 LiquidCrystal_I2C lcd(LCD_I2C_ADDR, LCD_COL, LCD_ROW);
@@ -31,10 +32,12 @@ looper sched;
 RunningMedian samples = RunningMedian(MEDIAN_SAMPLES);
 float temp_min = (analogRead(TEMP_SENS_PIN) / 2048.0) * 330.0;
 float temp_max = temp_min;
+bool led_state;
 
 void setup()
 {
   pinMode(AP_DATA_RESET_PIN, INPUT_PULLUP);
+  pinMode(ONBOARD_LED, OUTPUT);
 
   Serial.begin(115200);
   Serial.println(F("WLANThermometer (c)2020 H. Wirtz <wirtz@parasitstudio.de>"));
@@ -71,18 +74,18 @@ void setup()
   // then goes into a blocking loop awaiting configuration and will return success result
 
   lcd.clear();
-  lcd.setCursor(0, 3);
+  lcd.setCursor(0, 0);
   lcd.print(F("Mode Config-AP"));
-  lcd.setCursor(0, 4);
+  lcd.setCursor(0, 1);
   lcd.print(F("192.168.4.1"));
 
   if (!wm.autoConnect(AP_SSID_CONFIG_NAME, AP_CONFIG_PASSWORD))
   {
     DEBUG_MSG("Failed to connect\n");
-    lcd.setCursor(0, 4);
+    lcd.setCursor(0, 2);
     lcd.print(F("Failed              "));
     delay(1000);
-    lcd.setCursor(8, 4);
+    lcd.setCursor(8, 2);
     lcd.print(F("- restart"));
     delay(1000);
     ESP.restart();
@@ -110,10 +113,14 @@ void setup()
     delay(500);
   }
 
+  lcd.setCursor(0, 3);
+  lcd.print("Getting time...");
   DateTime.setTimeZone(2);
-  DateTime.begin();
-  if (!DateTime.isTimeValid()) {
+  DateTime.begin(NTP_TIMEOUT);
+  while (!DateTime.isTimeValid())
+  {
     Serial.println("Failed to get time from server.");
+    DateTime.forceUpdate();
   }
 
   sched.addJob(show_temperature, KRATE_TEMP);
@@ -140,6 +147,9 @@ void show_time(void)
   sprintf(dt, "%02d.%02d.%4d  %02d:%02d:%02d", p.getMonthDay(), p.getMonth() + 1, p.getYear(), p.getHours(), p.getMinutes(), p.getSeconds());
   lcd.setCursor(0, 0);
   lcd.print(dt);
+
+  digitalWrite(ONBOARD_LED, led_state);
+  led_state = !led_state;
 }
 
 void show_temperature(void)