main: activate 3rd watchdog

soft/main_pilot_wire_control/main_pilot_wire_control.ino

@@ -146,6 +146,8 @@ void setup()
   heaters[ROOM_RICO].callback = room_rico_callback;
   heaters[BATHROOM].callback = bathroom_callback;
 
+  lwdTicker.attach_ms(LWD_TIMEOUT_MS / 2, lwdtcb);
+
   for (i = 0; i < NB_HEATERS; i++) {
     pinMode(heaters[i].pin, OUTPUT);
     heater_off(heaters[i].pin);
@@ -178,6 +180,8 @@ void loop()
   static unsigned int counter;
   static bool led_state = false;
 
+  lwdtFeed();
+
   client.loop();
   if (!client.isConnected()) {
     // if something wrong happens, switch off the heater
@@ -192,5 +196,4 @@ void loop()
     led_on(led_state);
   }
   counter++;
-  lwdtFeed();
 }