wait a moment if DHT can't be reached

things/DeviceDht.cpp

@@ -28,6 +28,7 @@ void DeviceDht::deviceLoop() {
     // check if any reads failed and exit early
     if (isnan(humidity) || isnan(temperature)) {
       Serial.println("Failed to read from DHT sensor!");
+      delay(500);
       return;
     }