Hi!
Thanks for help, now it works perfect 
Posting updated code:
/**
- 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 - idefix
- DESCRIPTION
- Arduino BH1750FVI Light sensor
- communicate using I2C Protocol
- this library enable 2 slave device addresses
- Main address 0x23
- secondary address 0x5C
- connect the sensor as follows :
- VCC >>> 5V
- Gnd >>> Gnd
- ADDR >>> NC or GND
- SCL >>> A5
- SDA >>> A4
- http://www.mysensors.org/build/light
*/
#define MY_NODE_ID 9
// Enable debug prints to serial monitor
#define MY_DEBUG
// Enable and select radio type attached
#define MY_RADIO_NRF24
//#define MY_RADIO_RFM69
#define MY_RF24_PA_LEVEL RF24_PA_MAX
#include <SPI.h>
#include <MySensors.h>
#include <BH1750.h>
#include <Wire.h>
#define CHILD_ID_LIGHT 10
unsigned long lastTime = millis();
#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 0 // GPIO value to write to turn on attached relay
#define RELAY_OFF 1 // GPIO value to write to turn off attached relay
BH1750 lightSensor;
// transmitting LUX light level.
MyMessage msg(CHILD_ID_LIGHT, V_LIGHT_LEVEL);
// MyMessage msg(CHILD_ID_LIGHT, V_LEVEL);
uint16_t lastlux;
void before() {
for (int sensor=1, pin=RELAY_1; sensor<=NUMBER_OF_RELAYS;sensor++, pin++) {
// Then set relay pins in output mode
pinMode(pin, OUTPUT);
// Set relay to last known state (using eeprom storage)
digitalWrite(pin, loadState(sensor)?RELAY_ON:RELAY_OFF);
}
}
void setup()
{
lightSensor.begin();
for (int sensor=1, pin=RELAY_1; sensor<=NUMBER_OF_RELAYS;sensor++, pin++) {
// Then set relay pins in output mode
pinMode(pin, OUTPUT);
// Set relay to last known state (using eeprom storage)
digitalWrite(pin, loadState(sensor)?RELAY_ON:RELAY_OFF);
}
}
void presentation() {
// Send the sketch version information to the gateway and Controller
sendSketchInfo("Relays and Light Lux Sensor node", "1.0");
// Register all sensors to gateway (they will be created as child devices)
present(CHILD_ID_LIGHT, S_LIGHT_LEVEL);
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)
present(sensor, S_LIGHT);
}
}
void loop()
{
unsigned long currentTime = millis();
if (currentTime > lastTime + 60000) {
lastTime = currentTime;
uint16_t lux = lightSensor.readLightLevel();
Serial.println(lux);
if (lux != lastlux)
send(msg.set(lux));
lastlux = lux; }
}
void receive(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
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());
}
}
