make sure mqtt state is updated when timer expires

src/main.cpp

@@ -56,6 +56,7 @@ void loopHandler() {
       timer = 0;
       OUTPUT_SET(false);
       powerNode.setProperty("timer").send("0");
+      powerNode.setProperty("state").send("off");
     }
     if(millis() > next_timer_update) {
       next_timer_update = millis() + 60*1000;