Best posts made by maverick

@Dave-Dan @martinhjelmare

Guys, I've changed that configuration and it perfectly works !!!
Now I'm going to automate all the house...

Thanks for all the support and patience.

Guys, I'm adding this info to the thread just in case that someone may get this useful.

This is my final sketch:

/**
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 *
 * REVISION HISTORY
 * Version 1.0 - Henrik Ekblad
 * 
 * DESCRIPTION
 * Example sketch showing how to control physical relays. 
 * This example will remember relay state after power failure.
 * http://www.mysensors.org/build/relay
 */ 

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

#define SN "Living Foot Lamp"
#define SV "1.0"

#define NODE_ID 19

#define RELAY_PIN  3  // Arduino Digital I/O pin number for first relay (second on pin+1 etc)
#define RELAY_CHILD 1 
#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);  

// Select AtMega328 hardware profile
MyHwATMega328 hw;

// Construct MySensors library
MySensor gw(radio, hw);
MyMessage msg(RELAY_CHILD, V_STATUS);

void setup()  
{   
  // Initialize library and add callback for incoming messages
  gw.begin(incomingMessage, NODE_ID);
  
  // Send the sketch version information to the gateway and Controller
  gw.sendSketchInfo(SN, SV);

  gw.present(RELAY_CHILD, S_LIGHT);

  pinMode(RELAY_PIN, OUTPUT);

  digitalWrite(RELAY_PIN, RELAY_OFF);

  gw.send(msg.set(0));
  
}


void loop() 
{
  // Alway process incoming messages whenever possible
  gw.process();
}

void incomingMessage(const MyMessage &message) {
  // We only expect one type of message from controller. But we better check anyway.
  if (message.type==V_STATUS) {
    
     // Change relay state
     digitalWrite(RELAY_PIN, message.getBool()?RELAY_ON:RELAY_OFF);

      // debug info
     Serial.print("Incoming change for sensor:");
     Serial.print(message.sensor);
     Serial.print(", New status: ");
     Serial.println(message.getBool());
   } 
}

I'm not finished my board, but here are some pictures showing how I assembled all the pieces

Video: Show how is The Relay is Working