@BartE Adding the extra code done the job, now its working great. Thank you for your help! The final working code if someone wonders is: #include <SPI.h> #include <MySensor.h> #include <DHT.h> #include <Bounce2.h> #include <MySigningNone.h> #include <MyTransportNRF24.h> #include <MyTransportRFM69.h> #include <MyHwATMega328.h> #define NODE_ID 1 #define CHILD_ID_HUM 0 #define CHILD_ID_TEMP 1 #define CHILD_ID_RELAY 2 #define RELAY_PIN 3 #define BUTTON_PIN 4 #define HUMIDITY_SENSOR_DIGITAL_PIN 2 //unsigned long SLEEP_TIME = 30000; // Sleep time between reads (in milliseconds) #define RELAY_ON 1 // GPIO value to write to turn on attached relay #define RELAY_OFF 0 // GPIO value to write to turn off attached relay MyTransportNRF24 radio(RF24_CE_PIN, RF24_CS_PIN, RF24_PA_LEVEL_GW); MyHwATMega328 hw; MySensor gw(radio, hw); Bounce debouncer = Bounce(); int oldValue=0; bool state; MyMessage msg(CHILD_ID_RELAY,V_LIGHT); DHT dht; float lastTemp; float lastHum; boolean metric = true; MyMessage msgHum(CHILD_ID_HUM, V_HUM); MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP); void setup() { gw.begin(incomingMessage, AUTO, true); dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); gw.sendSketchInfo("Combo", "1.0"); gw.present(CHILD_ID_HUM, S_HUM); gw.present(CHILD_ID_TEMP, S_TEMP); pinMode(BUTTON_PIN,INPUT); digitalWrite(BUTTON_PIN,HIGH); debouncer.attach(BUTTON_PIN); debouncer.interval(5); gw.present(CHILD_ID_RELAY, S_LIGHT); metric = gw.getConfig().isMetric; digitalWrite(RELAY_PIN, RELAY_OFF); pinMode(RELAY_PIN, OUTPUT); state = gw.loadState(CHILD_ID_RELAY); digitalWrite(RELAY_PIN, state?RELAY_ON:RELAY_OFF); } unsigned long lastCheckTimestamp = 0; // setup stuff void incomingMessage(const MyMessage &message) { if (message.type == V_LIGHT) { digitalWrite(RELAY_PIN, message.getBool() ? RELAY_ON : RELAY_OFF); gw.saveState(1, message.getBool()); Serial.print("Incoming change for sensor:"); Serial.print(message.sensor); Serial.print(", New status: "); Serial.println(message.getBool()); } } void loop() { gw.process(); if (debouncer.update() && debouncer.read() == 0) { gw.send(msg.set(gw.loadState(1)?false:true), true); // Send new state and request ack back } // Check if the minimal sample period has been passed if ((lastCheckTimestamp < (millis() - dht.getMinimumSamplingPeriod()) ) || lastCheckTimestamp > millis()) { lastCheckTimestamp = millis(); // do the normal stuff after the delay float temperature = dht.getTemperature(); if (isnan(temperature)) { Serial.println("Failed reading temperature from DHT"); } else if (temperature != lastTemp) { lastTemp = temperature; if (!metric) { temperature = dht.toFahrenheit(temperature); } gw.send(msgTemp.set(temperature, 1)); Serial.print("T: "); Serial.println(temperature); } float humidity = dht.getHumidity(); if (isnan(humidity)) { Serial.println("Failed reading humidity from DHT"); } else if (humidity != lastHum) { lastHum = humidity; gw.send(msgHum.set(humidity, 1)); Serial.print("H: "); Serial.println(humidity); } } }