I already did, but i can't find the mistake.

It's for an LED candle.

Is the mistake in here?

gw.sleep(SLEEP_TIME); //sleep a bit

Thats my sketch:

#include <MySigningNone.h>
#include <MyTransportNRF24.h>
#include <MyTransportRFM69.h>
#include <MyHwATMega328.h>
#include <MySensor.h>
#include <SPI.h>

#define RELAY_1  3  // Arduino Digital I/O pin number for first relay (second on pin+1 etc)
#define NUMBER_OF_RELAYS 1 // Total number of attached relays
#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

// NRFRF24L01 radio driver (set low transmit power by default) 
MyTransportNRF24 radio(RF24_CE_PIN, RF24_CS_PIN, RF24_PA_LEVEL_GW);  

MyHwATMega328 hw;

MySensor gw(radio, hw);

unsigned long AWAKE_TIME = 20000; // Sleep time (in milliseconds)
unsigned long SLEEP_TIME = 7000; // Sleep time (in milliseconds)

void setup()  
{   
  // Initialize library and add callback for incoming messages
  gw.begin(incomingMessage, AUTO, true);
  // Send the sketch version information to the gateway and Controller
  gw.sendSketchInfo("Relay", "1.0");
  
  // Fetch relay status
  for (int sensor=1, pin=RELAY_1; sensor<=NUMBER_OF_RELAYS;sensor++, pin++) {
    // Register all sensors to gw (they will be created as child devices)
    gw.present(sensor, S_LIGHT);
    // Then set relay pins in output mode
    pinMode(pin, OUTPUT);   
    // Set relay to last known state (using eeprom storage) 
    digitalWrite(pin, gw.loadState(sensor)?RELAY_ON:RELAY_OFF);
  }
}


void loop() 
{
  // Alway process incoming messages whenever possible
  gw.process();
  Serial.print(" Awake for "); Serial.print(AWAKE_TIME); Serial.print(" ms");
  delay(AWAKE_TIME);
  Serial.print(" Sleeping for "); Serial.print(SLEEP_TIME); Serial.print(" ms");
  gw.sleep(SLEEP_TIME); //sleep a bit
}

void incomingMessage(const MyMessage &message) {
  // We only expect one type of message from controller. But we better check anyway.
  if (message.type==V_LIGHT) {
     // Change relay state
     digitalWrite(message.sensor-1+RELAY_1, message.getBool()?RELAY_ON:RELAY_OFF);
     // Store state in eeprom
     gw.saveState(message.sensor, message.getBool());
     // Write some debug info
     Serial.print("Incoming change for sensor:");
     Serial.print(message.sensor);
     Serial.print(", New status: ");
     Serial.println(message.getBool());
   } 
}``````

In my eyes the NRF24 doesn't wake up, because i can't send messages to the node.

It also just uses 3,8 mA, when it's awoken.

Hello Guys,

how can i wake up the NRF24 from sleeping mode without sending a message?

Is it possible to update the following sketch to make it work with the current MySensors 1.4 release?

https://github.com/wbcode/ham/blob/master/arduino/MySensorRFIDandRGB/SendRfidToGateway/SendRfidToGateway.ino

That would be very great , because I am a Arduino beginner and not able to do it...

It would offer me the opportunity to send the Tag/Card IDs to FHEM .