Skip to content
Go to file
Cannot retrieve contributors at this time
97 lines (81 sloc) 2.82 KB
* 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 <>
* Copyright (C) 2013-2019 Sensnology AB
* Full contributor list:
* Documentation:
* Support Forum:
* 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.
* Version 1.0 - Henrik Ekblad
* Example sketch showing how to control physical relays.
* This example will remember relay state after power failure.
// Enable debug prints to serial monitor
#define MY_DEBUG
// Enable and select radio type attached
#define MY_RADIO_RF24
//#define MY_RADIO_NRF5_ESB
//#define MY_RADIO_RFM69
//#define MY_RADIO_RFM95
// Enable repeater functionality for this node
#include <MySensors.h>
#define RELAY_PIN 4 // 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
void before()
for (int sensor=1, pin=RELAY_PIN; 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()
void presentation()
// Send the sketch version information to the gateway and Controller
sendSketchInfo("Relay", "1.0");
for (int sensor=1, pin=RELAY_PIN; sensor<=NUMBER_OF_RELAYS; sensor++, pin++) {
// Register all sensors to gw (they will be created as child devices)
present(sensor, S_BINARY);
void loop()
void receive(const MyMessage &message)
// We only expect one type of message from controller. But we better check anyway.
if (message.getType()==V_STATUS) {
// Change relay state
digitalWrite(message.getSensor()-1+RELAY_PIN, message.getBool()?RELAY_ON:RELAY_OFF);
// Store state in eeprom
saveState(message.getSensor(), message.getBool());
// Write some debug info
Serial.print("Incoming change for sensor:");
Serial.print(", New status: ");
You can’t perform that action at this time.