Multi Button Relay Sketch

Boots33

Guys I feel this thread has wandered a long way from the original topic and has taken up a lot of time. i really don't think there is a lot to be gained by turning the fairly simple relay sketch into what you now desire.

Even with the changes it still will not work if it boots up and can't find the gateway.

I am posting a final sketch which you may like to try, again it is untested so you may still need to work on it. I hope you understand I have a few of my own uncompleted projects that I want to get back to with the limited free time I have. Good luck with your MySensors journey.

#define MY_DEBUG
#define MY_RADIO_NRF24
#define MY_REPEATER_FEATURE

#include <SPI.h>
#include <MySensors.h>
#include <Bounce2.h>

#define RELAY_ON 1
#define RELAY_OFF 0

#define SSR_A_ID 1   // Id of the sensor child
#define SSR_B_ID 2   // Id of the sensor child

const int buttonPinA = 18;
const int buttonPinB = 19;
const int relayPinA = 5;
const int relayPinB = 6;
int oldValueA = 0;
int oldValueB = 0;
bool stateA = false;
bool stateB = false;
int trigger = 0;


Bounce debouncerA = Bounce();
Bounce debouncerB = Bounce();

MyMessage msgA(SSR_A_ID, V_STATUS);
MyMessage msgB(SSR_B_ID, V_STATUS);

void setup()
{

  pinMode(buttonPinA, INPUT_PULLUP); // Setup the button Activate internal pull-up
  pinMode(buttonPinB, INPUT_PULLUP); // Setup the button Activate internal pull-up
// Then set relay pins in output mode
  pinMode(relayPinA, OUTPUT);
  pinMode(relayPinB, OUTPUT);

  // After setting up the buttons, setup debouncer
  debouncerA.attach(buttonPinA);
  debouncerA.interval(5);
  debouncerB.attach(buttonPinB);
  debouncerB.interval(5);

  // Make sure relays are off when starting up
  digitalWrite(relayPinA, RELAY_OFF);
  digitalWrite(relayPinB, RELAY_OFF);
  

    /*--------------------- Added these lines for toggle switch-------------------------*/
  oldValueA = digitalRead(buttonPinA);  // set oldValueA to the current status of the toggle switch
  oldValueB = digitalRead(buttonPinB);  // set oldValueB to the current status of the toggle switch
 // send(msgA.set(false)); // Send off state for relayA to ensure controller knows the switch is off
 // send(msgB.set(false)); // Send off state for relayB to ensure controller knows the switch is off
  
}

void presentation()  {
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("Mains Controller", "1.0");

  // Register all sensors to gw (they will be created as child devices)
  present(SSR_A_ID, S_LIGHT);
  present(SSR_B_ID, S_LIGHT);

}

/*
   Example on how to asynchronously check for new messages from gw
*/
void loop()
{
if (trigger == 0){
  send(msgA.set(false)); // Send off state for relayA to ensure controller knows the switch is off
  send(msgB.set(false)); // Send off state for relayB to ensure controller knows the switch is off
  trigger = 1;
}


if (isTransportOK()){
   // put code to execute when connection is available here
    connectionPresent();

  } 
  else {
   // put code to execute when no connection is available here
   connectionLost();
  }

  
}

void receive(const MyMessage &message) {
  // We only expect one type of message from controller. But we better check anyway.
  if (message.type == V_STATUS) {
      
    switch (message.sensor) {
      case 1:
        stateA = message.getBool();
        digitalWrite(message.sensor + 4, stateA ? RELAY_ON : RELAY_OFF);
        
        break;
      case 2:
        stateB = message.getBool();
        digitalWrite(message.sensor + 4, stateB ? RELAY_ON : RELAY_OFF);
        
        break;
      
    }
   
      // Write some debug info
    Serial.print("Incoming change for sensor:");
    Serial.println(message.sensor);
    Serial.print("from node:");
    Serial.println(message.sender);
    Serial.print(", New status: ");
    Serial.println(message.getBool());
  }
}



void connectionPresent() {
// put code to execute when connection is available here
     debouncerA.update();
  // Get the update value
  int valueA = debouncerA.read();
  if (valueA != oldValueA) {
    send(msgA.set(stateA ? false : true), true); // Send new state and request ack back
  oldValueA = valueA;
  }
 

  debouncerB.update();
  // Get the update value
  int valueB = debouncerB.read();
  if (valueB != oldValueB) {
    send(msgB.set(stateB ? false : true), true); // Send new state and request ack back
  oldValueB = valueB;
  } 
}



  void connectionLost() {

   // put code to execute when no connection is available here
    debouncerA.update();
  // Get the update value
  int valueA = debouncerA.read();
  if (valueA != oldValueA) {
   // send(msgA.set(stateA ? false : true), true); // Send new state and request ack back
    send(msgA.set(stateA ? false : true), false); // Send new state with no request for ack
    stateA = stateA ? false : true;               // invert the state
     digitalWrite(relayPinA, stateA ? RELAY_ON : RELAY_OFF);  // toggle the relay
  oldValueA = valueA;
  }
 

  debouncerB.update();
  // Get the update value
  int valueB = debouncerB.read();
  if (valueB != oldValueB) {
    //send(msgB.set(stateB ? false : true), true); // Send new state and request ack back
    send(msgB.set(stateB ? false : true), false); // Send new state with no request for ack
    stateB = stateB ? false : true;                // invert the state
     digitalWrite(relayPinB, stateB ? RELAY_ON : RELAY_OFF);  // toggle the relay
    
  oldValueB = valueB;
  }
}

pepson

Still not working correct. After lost connection with gateway and then change status , after connection restore , but status is still not update in Domoticz. Still show before lost connection.

rayan

This post is deleted!

rayan

@Boots33
hi my friend.
i use your sketch and thank you.but there is a problem.
sketchs in site , when relay is fail , when i send command , so show to me "Error sending switch command, check device/hardware !" but your sketch dont show this error. so i dont understand relay is fail or no , when we are out home. can you fix this ?

breimann

@korttoma love this sketch. Used it for a dual LED strip light controller for our loft where our kids sleep - daughter on one side and boys on the other, both with LED strips (RGB) i installed. This way we can turn them on or off remotely without having to climb up there!!

Worked great. Thankyou for sharing.

moskovskiy82

Anybody has a sketch where multiple buttons are put up on single wire and voltage drop is used to distinguish between them?

nieaty

This post is deleted!

pepson

Hi
Has anybody solution how resolved problem update status when connection with gateway is not available and then come back connection with gateway?

pepson

Hi
Has anybody solution how resolved problem update status when connection with gateway is not available and then come back connection with gateway?

Boots33

@pepson have a look at this Synchronising Light switch

pepson

I try sketch from your link but i test and the same issu.
I enable relay, then disable GATEWAY MySensors on DOmoticz and then change status relay to DISABLE by button. Then enable Gateway on Domoticz and still in domoticz show that relay is ENABLED. Not update status that i manual DISABLE relay by button.

pepson

This is my sketch with my radio and this not working... no sync status after lost connection with gateway and after come back gateway...

/*
   Relay with button sketch
   modified to work with no uplink
   to gateway and try to maintain sync to controller
*/


#define MY_DEBUG                               // Enable debug prints to serial monitor

#define MY_RADIO_RFM69
#define MY_RFM69_FREQUENCY RF69_868MHZ
#define MY_IS_RFM69HW                         // Enable and select radio type attached

#define MY_TRANSPORT_WAIT_READY_MS 5000        //set how long to wait for transport ready in milliseconds

// Enabled repeater feature for this node
#define MY_REPEATER_FEATURE

// Node id defaults to AUTO (tries to fetch id from controller)
#define MY_NODE_ID 10

#include <MySensors.h>
#include <Bounce2.h>

#define RELAY_PIN  5      // Arduino Digital I/O pin number for relay 
#define BUTTON_PIN  3     // Arduino Digital I/O pin number for button 
#define CHILD_ID 1        // Id of the sensor child
#define RELAY_ON 0
#define RELAY_OFF 1

Bounce debouncer = Bounce();
int oldValue = 0;
bool uplinkAvailable = true;
bool state = false;
bool requestState;
bool firstStart = true;
unsigned long uplinkCheckTime ;                // holder for uplink checks
unsigned long uplinkCheckPeriod = 30*1000;     // time between checks for uplink in milliseconds
unsigned long returnWait = 1500;               // how long to wait for return from controller in milliseconds
MyMessage msg(CHILD_ID, V_STATUS);

void setup(){
  pinMode(BUTTON_PIN, INPUT_PULLUP);           // Setup the button pin, Activate internal pull-up
  
  debouncer.attach(BUTTON_PIN);                // After setting up the button, setup debouncer
  debouncer.interval(5);

  pinMode(RELAY_PIN, OUTPUT);                 // set relay pin in output mode
  digitalWrite(RELAY_PIN, RELAY_OFF);         // Make sure relay is off when starting up
}

void presentation()  {
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("Relay & Button", "1.0");

  // Register all sensors to gw (they will be created as child devices)
  present(CHILD_ID, S_BINARY);
}


void loop(){
  if (firstStart) {                            // this code is only run once at startup
    Serial.println("First run started");
    if (request( CHILD_ID, V_STATUS)) {       // request the current state of the switch on the controller and check that an ack was received
      Serial.println("uplink available");
      wait (returnWait);                      //wait needed to allow request to return from controller
      Serial.print("controller state --- ");
      Serial.println(requestState);
      if (requestState != state) {           // check that controller is corectly showing the current relay state
        send(msg.set(state), false);         // notify controller of current state
      }
    }
    else {
      Serial.println("uplink not available");
      uplinkAvailable = false;               // no uplink established
      uplinkCheckTime = millis();
    }
    firstStart = false;                     // set firstStart flag false to prevent code from running again
  }

  debouncer.update();
  int value = debouncer.read();                               // Get the update value
  if (value != oldValue && value == 0) {                      // check for new button push
    state =  !state;                                          // Toggle the state
    digitalWrite(RELAY_PIN, state ? RELAY_ON : RELAY_OFF);    // switch the relay to the new state
    if (!send(msg.set(state), true)) {                        //Attempt to notify controller of changed state
      Serial.println("uplink not available");
      uplinkAvailable = false;                                // no uplink available
      uplinkCheckTime = millis();                             
    }
  }
 oldValue = value;

  if (!uplinkAvailable && (millis() - uplinkCheckTime > uplinkCheckPeriod) ) {       // test to see if function should be called
    uplinkCheck();                                                                  // call uplink checking function
  }

}

/*-------------------start of functions--------------------------*/

void receive(const MyMessage &message) {
  if (message.type == V_STATUS) {                                   // check to see if incoming message is for a switch
    switch (message.getCommand()) {                                 // message.getCommand will give us the command type of the incomming message
      case C_SET:                                                   //message is a set command  from controller to update relay state
        state = message.getBool();                                  // get the new state
        digitalWrite(RELAY_PIN, state ? RELAY_ON : RELAY_OFF);      // switch relay to new state
        uplinkAvailable = true;                                     //  uplink established
        /*---- Write some debug info----*/
        Serial.print("Incoming change for sensor:");
        Serial.print(message.sensor);
        Serial.print(", New status: ");
        Serial.println(message.getBool());
        break;
      case C_REQ:                                               // message is a returning request from controller
        requestState = message.getBool();                       // update requestState with returning state
        break;
    }
  }
}

void uplinkCheck() {
  if (request( CHILD_ID, V_STATUS)) {         // request the current state of the switch on the controller and check that the request was succsessful
    Serial.println("uplink re-established");
    wait (returnWait);                        //wait needed to allow request to return from controller
    if (requestState != state) {              // check that controller is corectly showing the current relay state
      send(msg.set(state), false);            // notify controller of current state no ack
      uplinkAvailable = true;                 //  uplink established
    }
  }
  uplinkCheckTime = millis();                // reset the checktime
  Serial.println("uplinkchecktime reset");
}```

Boots33

@pepson said in Multi Button Relay Sketch:

I try sketch from your link but i test and the same issu.
I enable relay, then disable GATEWAY MySensors on DOmoticz and then change status relay to DISABLE by button. Then enable Gateway on Domoticz and still in domoticz show that relay is ENABLED. Not update status that i manual DISABLE relay by button.

As far as I know there is no direct way to test for a connection all the way to the controller in MySensors 2.1.

My sketch for the synchronising switch uses the presence of the gateway as the test, this has been adequate for my needs. My controller and gateway are both powered from the same place so they both go down if power is lost.

I have found Domoticz very stable and have not had any issues with it at all so am wondering why Dometicz seems to be giving you problems. is it powered from a different supply to your gateway?

I do have another sketch that uses requestTime as a way of checking for the controller that may be of use to you. it needs a little cleaning up first, so will have a look at it when i get a chance and post it for you to try.

pepson

@boots33
Gateway and Node has the same POWER. But Node start faster than Domoticz with Gateway.

But in my gateway is not tested when i use radio RFM69HW ?
Problem is when Domoticz with gateway down power, (also NODE down power). When power come back and under start Domoticz i change status on relay it is not show in domoticz because NODE with relay start faster than DOmoticz with Gateway.
Also when i disable power from Domoticz with ENABLE RELAY . but NODe has still power and change relay to DISABLE and then again POWER ON Domoticz. After run Domoticz not show actual status my Relay because GATWAY was disable when i change status relay.

Explaine me more please for what is in your sketch SYNCHRONISING ? What does it give us?

Boots33

@pepson said in Multi Button Relay Sketch:

because NODE with relay start faster than DOmoticz with Gateway.

One solution could be to add a delay to your node and gateway sketches. This could just be run once as the node/gateway boots up thus giving Domoticz time to boot.

Also when i disable power from Domoticz with ENABLE RELAY . but NODe has still power and change relay to DISABLE and then again POWER ON Domoticz. After run Domoticz not show actual status my Relay because GATWAY was disable >when i change status relay.

As I have said earlier all MySensors 2.1 checks for uplink available are only checking for a connection to the gateway not all the way to the controller. So you can turn the controller on and off as often as you like and the node will not know it is not there. As long as the gateway is present the node will show the uplink as available.

Explaine me more please for what is in your sketch SYNCHRONISING ? What does it give us?

My original syncing switch sketch that i pointed you to above will work for most normal situations where the controller and gateway are on the same power supply. If you add the delay I have mentioned to your Gateway/node then that will allow the controller to boot first when returning from a power outage.

When you are turning off the controller by itself I do not think that is a true real world test, if the gateway and controller share the same power supply then this is not likely to happen.

In any case you may need to implement some form of code on Dometicz to push the occurrence of a controller reboot to your nodes. The nodes will not detect a missing controller unless your nodes are constantly pinging the controller to see if it is there.

I do have the other sketch using a time request to check for the presence of the controller, I will post that code in my Synchronising Light switch thread for you to try.

pepson

@boots33 said in Multi Button Relay Sketch:

When you are turning off the controller by itself I do not think that is a true real world test, if the gateway and controller share the same power supply then this is not likely to happen.
In any case you may need to implement some form of code on Dometicz to push the occurrence of a controller reboot to your nodes. The nodes will not detect a missing controller unless your nodes are constantly pinging the controller to see if it is there.
I do have the other sketch using a time request to check for the presence of the controller, I will post that code in my Synchronising Light switch thread for you to try.

Ok i wait for your sketch using a time request...

I have Domoticz on Raspberry Pi3 and to this Raspberry i have connected Gateway MySensors on Arduino Nano by USB from Rasspberry.

Can you ready code for delay start gateway and node ?

And tell me when i restart Gateway , it ceck status NODE ? How i can restart gateway on my raspberry without disable raspberry and domoticz ?

Pictor Lallemand

hello,

I made this code it save state in EEPROM after reboot it load previous state saved .
I share you my sketch is made for 4 relays an 4 momentary button.

// Enable debug prints to serial monitor
#define MY_DEBUG

// Enable and select radio type attached
#define MY_RADIO_NRF24
//#define MY_RADIO_RFM69

// Enabled repeater feature for this node
#define MY_REPEATER_FEATURE

#include <SPI.h>
#include <MySensors.h>
#include <Bounce2.h>

#define RELAY_PIN0  5  // Arduino Digital I/O pin number for relay 
#define RELAY_PIN1  6
#define RELAY_PIN2  7
#define RELAY_PIN3  8
#define BUTTON_PIN0  A0  // Arduino Digital I/O pin number for button 
#define BUTTON_PIN1  A1  // Arduino Digital I/O pin number for button 
#define BUTTON_PIN2  A2  // Arduino Digital I/O pin number for button 
#define BUTTON_PIN3  A3  // Arduino Digital I/O pin number for button 

#define CHILD0_ID 50   // Id of the sensor child
#define CHILD1_ID 51   // Id of the sensor child
#define CHILD2_ID 52   // Id of the sensor child
#define CHILD3_ID 53   // Id of the sensor child

#define RELAY_ON 1
#define RELAY_OFF 0

Bounce debouncerA = Bounce();
Bounce debouncerB = Bounce();
Bounce debouncerC = Bounce();
Bounce debouncerD = Bounce();

int oldValueA = 0;
int oldValueB = 0;
int oldValueC = 0;
int oldValueD = 0;

bool stateA;
bool stateB;
bool stateC;
bool stateD;

MyMessage msgA(CHILD0_ID, V_LIGHT);
MyMessage msgB(CHILD1_ID, V_LIGHT);
MyMessage msgC(CHILD2_ID, V_LIGHT);
MyMessage msgD(CHILD3_ID, V_LIGHT);

void setup()
{
  // Setup the button
  pinMode(BUTTON_PIN0, INPUT_PULLUP);
  pinMode(BUTTON_PIN1, INPUT_PULLUP);
  pinMode(BUTTON_PIN2, INPUT_PULLUP);
  pinMode(BUTTON_PIN3, INPUT_PULLUP);

  // After setting up the button, setup debouncer
  debouncerA.attach(BUTTON_PIN0);
  debouncerA.interval(5);
  debouncerB.attach(BUTTON_PIN1);
  debouncerB.interval(5);
  debouncerC.attach(BUTTON_PIN2);
  debouncerC.interval(5);
  debouncerD.attach(BUTTON_PIN3);
  debouncerD.interval(5);

  // Make sure relays are off when starting up
  digitalWrite(RELAY_PIN0, RELAY_OFF);
  digitalWrite(RELAY_PIN1, RELAY_OFF);
  digitalWrite(RELAY_PIN2, RELAY_OFF);
  digitalWrite(RELAY_PIN3, RELAY_OFF);
  // Then set relay pins in output mode
  pinMode(RELAY_PIN0, OUTPUT);
  pinMode(RELAY_PIN1, OUTPUT);
  pinMode(RELAY_PIN2, OUTPUT);
  pinMode(RELAY_PIN3, OUTPUT);



  // Set relay to last known state (using eeprom storage)
  stateA = loadState(CHILD0_ID);
  digitalWrite(RELAY_PIN0, stateA ? RELAY_ON : RELAY_OFF);

  stateB = loadState(CHILD1_ID);
  digitalWrite(RELAY_PIN1, stateB ? RELAY_ON : RELAY_OFF);

  stateC = loadState(CHILD2_ID);
  digitalWrite(RELAY_PIN2, stateC ? RELAY_ON : RELAY_OFF);

  stateD = loadState(CHILD3_ID);
  digitalWrite(RELAY_PIN3, stateD ? RELAY_ON : RELAY_OFF);
}

void presentation()  {
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("4 Relay & button", "1.0");

  // Register all sensors to gw (they will be created as child devices)
  present(CHILD0_ID, S_LIGHT);
  present(CHILD1_ID, S_LIGHT);
  present(CHILD2_ID, S_LIGHT);
  present(CHILD3_ID, S_LIGHT);
}

/*
   Example on how to asynchronously check for new messages from gw
*/
void loop()
{
  debouncerA.update();
  // Get the update value
  int valueA = debouncerA.read();
  if (valueA != oldValueA && valueA == 0) {
    send(msgA.set(stateA ? false : true), true); // Send new state and request ack back
  }
  oldValueA = valueA;

  debouncerB.update();
  // Get the update value
  int valueB = debouncerB.read();
  if (valueB != oldValueB && valueB == 0) {
    send(msgB.set(stateB ? false : true), true); // Send new state and request ack back
  }
  oldValueB = valueB;

  debouncerC.update();
  // Get the update value
  int valueC = debouncerC.read();
  if (valueC != oldValueC && valueC == 0) {
    send(msgC.set(stateC ? false : true), true); // Send new state and request ack back
  }
  oldValueC = valueC;

  debouncerD.update();
  // Get the update value
  int valueD = debouncerD.read();
  if (valueD != oldValueD && valueD == 0) {
    send(msgD.set(stateD ? false : true), true); // Send new state and request ack back
  }
  oldValueD = valueD;
}

void receive(const MyMessage &message) {
  // We only expect one type of message from controller. But we better check anyway.
  if (message.type == V_LIGHT) {
    
    switch (message.sensor) {
      case CHILD0_ID:
        stateA = message.getBool();
        digitalWrite(RELAY_PIN0, stateA ? RELAY_ON : RELAY_OFF);
        saveState(CHILD0_ID, stateA);
        break;
        
      case CHILD1_ID:
        stateB = message.getBool();
        digitalWrite(RELAY_PIN1, stateB ? RELAY_ON : RELAY_OFF);
        saveState(CHILD1_ID, stateB);
        break;

      case CHILD2_ID:
        stateC = message.getBool();
        digitalWrite(RELAY_PIN2, stateC ? RELAY_ON : RELAY_OFF);
        saveState(CHILD2_ID, stateC);
        break;
        
      case CHILD3_ID:
        stateD = message.getBool();
        digitalWrite(RELAY_PIN3, stateD ? RELAY_ON : RELAY_OFF);
        saveState(CHILD3_ID, stateD);
        break;
    }
    // Write some debug info
    Serial.print("Incoming change for sensor:");
    Serial.print(message.sensor);
    Serial.print(", New status: ");
    Serial.println(message.getBool());
  }
}

rejoe2

@pictor-lallemand You may also have a look at the sketch @korttoma published in post #33. It does exactly the same than yours, but in case one needs more or less relays, it's much easier to adopt :grinning: .

nelsonov

@korttoma Two years later.... I just wanted to say that your sketch is elegant and beautiful. Using arrays is an idea I had as well, but I was just starting to write something when I thought about looking to see if someone had already done it. You saved me days of yelling at the monitor trying work it out for myself. You should consider making a topic out of this script.

pepson

@pictor-lallemand

Hi
I change your sketch to working wirg serial wire gateway on my Arduino Mega 2560 but not working.
Why...
In home assistant found 4 childs number:50, 51, 52, 53 but when try change state relay by button or by Home Assistant , state relay not change. Please look.


// Enable debug prints to serial monitor
#define MY_DEBUG 

// Enable serial gateway
#define MY_GATEWAY_SERIAL

// Define a lower baud rate for Arduino's running on 8 MHz (Arduino Pro Mini 3.3V & SenseBender)
#if F_CPU == 8000000L
#define MY_BAUD_RATE 38400
#endif

// Enable debug prints to serial monitor
#define MY_DEBUG

#include <SPI.h>
#include <MySensors.h>
#include <Bounce2.h>

#define RELAY_PIN0  5  // Arduino Digital I/O pin number for relay 
#define RELAY_PIN1  6
#define RELAY_PIN2  7
#define RELAY_PIN3  8
#define BUTTON_PIN0  A0  // Arduino Digital I/O pin number for button 
#define BUTTON_PIN1  A1  // Arduino Digital I/O pin number for button 
#define BUTTON_PIN2  A2  // Arduino Digital I/O pin number for button 
#define BUTTON_PIN3  A3  // Arduino Digital I/O pin number for button 

#define CHILD0_ID 50   // Id of the sensor child
#define CHILD1_ID 51   // Id of the sensor child
#define CHILD2_ID 52   // Id of the sensor child
#define CHILD3_ID 53   // Id of the sensor child

#define RELAY_ON 1
#define RELAY_OFF 0

Bounce debouncerA = Bounce();
Bounce debouncerB = Bounce();
Bounce debouncerC = Bounce();
Bounce debouncerD = Bounce();

int oldValueA = 0;
int oldValueB = 0;
int oldValueC = 0;
int oldValueD = 0;

bool stateA;
bool stateB;
bool stateC;
bool stateD;

MyMessage msgA(CHILD0_ID, V_LIGHT);
MyMessage msgB(CHILD1_ID, V_LIGHT);
MyMessage msgC(CHILD2_ID, V_LIGHT);
MyMessage msgD(CHILD3_ID, V_LIGHT);

void setup()
{
  // Setup the button
  pinMode(BUTTON_PIN0, INPUT_PULLUP);
  pinMode(BUTTON_PIN1, INPUT_PULLUP);
  pinMode(BUTTON_PIN2, INPUT_PULLUP);
  pinMode(BUTTON_PIN3, INPUT_PULLUP);

  // After setting up the button, setup debouncer
  debouncerA.attach(BUTTON_PIN0);
  debouncerA.interval(5);
  debouncerB.attach(BUTTON_PIN1);
  debouncerB.interval(5);
  debouncerC.attach(BUTTON_PIN2);
  debouncerC.interval(5);
  debouncerD.attach(BUTTON_PIN3);
  debouncerD.interval(5);

  // Make sure relays are off when starting up
  digitalWrite(RELAY_PIN0, RELAY_OFF);
  digitalWrite(RELAY_PIN1, RELAY_OFF);
  digitalWrite(RELAY_PIN2, RELAY_OFF);
  digitalWrite(RELAY_PIN3, RELAY_OFF);
  // Then set relay pins in output mode
  pinMode(RELAY_PIN0, OUTPUT);
  pinMode(RELAY_PIN1, OUTPUT);
  pinMode(RELAY_PIN2, OUTPUT);
  pinMode(RELAY_PIN3, OUTPUT);



  // Set relay to last known state (using eeprom storage)
  stateA = loadState(CHILD0_ID);
  digitalWrite(RELAY_PIN0, stateA ? RELAY_ON : RELAY_OFF);

  stateB = loadState(CHILD1_ID);
  digitalWrite(RELAY_PIN1, stateB ? RELAY_ON : RELAY_OFF);

  stateC = loadState(CHILD2_ID);
  digitalWrite(RELAY_PIN2, stateC ? RELAY_ON : RELAY_OFF);

  stateD = loadState(CHILD3_ID);
  digitalWrite(RELAY_PIN3, stateD ? RELAY_ON : RELAY_OFF);
}

void presentation()  {
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("4 Relay & button", "1.0");

  // Register all sensors to gw (they will be created as child devices)
  present(CHILD0_ID, S_LIGHT);
  present(CHILD1_ID, S_LIGHT);
  present(CHILD2_ID, S_LIGHT);
  present(CHILD3_ID, S_LIGHT);
}

/*
   Example on how to asynchronously check for new messages from gw
*/
void loop()
{
  debouncerA.update();
  // Get the update value
  int valueA = debouncerA.read();
  if (valueA != oldValueA && valueA == 0) {
    send(msgA.set(stateA ? false : true), true); // Send new state and request ack back
  }
  oldValueA = valueA;

  debouncerB.update();
  // Get the update value
  int valueB = debouncerB.read();
  if (valueB != oldValueB && valueB == 0) {
    send(msgB.set(stateB ? false : true), true); // Send new state and request ack back
  }
  oldValueB = valueB;

  debouncerC.update();
  // Get the update value
  int valueC = debouncerC.read();
  if (valueC != oldValueC && valueC == 0) {
    send(msgC.set(stateC ? false : true), true); // Send new state and request ack back
  }
  oldValueC = valueC;

  debouncerD.update();
  // Get the update value
  int valueD = debouncerD.read();
  if (valueD != oldValueD && valueD == 0) {
    send(msgD.set(stateD ? false : true), true); // Send new state and request ack back
  }
  oldValueD = valueD;
}

void receive(const MyMessage &message) {
  // We only expect one type of message from controller. But we better check anyway.
  if (message.type == V_LIGHT) {
    
    switch (message.sensor) {
      case CHILD0_ID:
        stateA = message.getBool();
        digitalWrite(RELAY_PIN0, stateA ? RELAY_ON : RELAY_OFF);
        saveState(CHILD0_ID, stateA);
        break;
        
      case CHILD1_ID:
        stateB = message.getBool();
        digitalWrite(RELAY_PIN1, stateB ? RELAY_ON : RELAY_OFF);
        saveState(CHILD1_ID, stateB);
        break;

      case CHILD2_ID:
        stateC = message.getBool();
        digitalWrite(RELAY_PIN2, stateC ? RELAY_ON : RELAY_OFF);
        saveState(CHILD2_ID, stateC);
        break;
        
      case CHILD3_ID:
        stateD = message.getBool();
        digitalWrite(RELAY_PIN3, stateD ? RELAY_ON : RELAY_OFF);
        saveState(CHILD3_ID, stateD);
        break;
    }
    // Write some debug info
    Serial.print("Incoming change for sensor:");
    Serial.print(message.sensor);
    Serial.print(", New status: ");
    Serial.println(message.getBool());
  }
}```

Multi Button Relay Sketch

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