   }
 }
 
+void sendHeartbeat()
+{
+  led1.on();
+}
+
 void loop()
 {
   Blynk.run();


SimpleTimer timer;

WidgetLCD lcd(V5);

WidgetRTC rtc;


  timer.setInterval(2500L, sendTemps); // Temperature sensor polling interval
  timer.setInterval(2500L, sendLCDstatus); // Blower fan status polling interval
  timer.setInterval(5000L, sendHeartbeat); // Blinks Blynk LED to reflect online status

  while (Blynk.connect() == false) {
    // Wait until connected
