💬 Relay

[riochicken]

@mfalkvidd I have no clue how to decode the examples you gave, normally in vb or powershell I would check if a pin would be active if another color was requested so I could turn off the other color but I am a bit lost with the code....

[pepson]

Hi all
I use this sketch for controlling 2 x relays. Can anybody change me this sketch to controliling only 1 x relay ?

Next problem....
Anybody know how edit sketch for relays to add itrms to send repeate update status to gateway? I want eliminate problem when node start and change status , but gateway is disabled. And after gateway will be enable show in my Domoticz old status/last memory before disable gateway. But after this node has changed status and this status is not show in Domoticz after run. I want to work it as Z-Wave. Z-wave has always actual status. Is any chance to also MySensors Gateway and not has always actual status ?

/**
   DESCRIPTION
   Sketch for 2x relay with buttons monostable. After back power all relays set OFF and send correct status OFF to controller.  
*/

// 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_RFM69_FREQUENCY RF69_868MHZ
#define MY_IS_RFM69HW

// 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 AUTO

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

// Define 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

// Define Sensor ID's
#define SSR_A_ID 1   // Id of the sensor child
#define SSR_B_ID 2   // Id of the sensor child

// Define buttons and relays
const int buttonPinA = 3;
const int buttonPinB = 4;
const int relayPinA = 5;
const int relayPinB = 6;

// Define Variables
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


  // 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);
  // Then set relay pins in output mode
  pinMode(relayPinA, OUTPUT);
  pinMode(relayPinB, OUTPUT);

}

void presentation()  {
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("2xRelay with monostable", "2.1");

  // 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;
}
  
  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;
}

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());
  }
}```

[oufman]

Hello,
I would like to do an auto off after 2 sec directly in the sketch, however I do not understand how to write the code? I do not want to make a loop, but on pressing the ON button from my box the relay is activated is deactivated after 2 sec.

Thank you for your help.

[Efflon]

I'm trying to wrap my head around the button example and don't understand what the loop() really does. To me it only alters the "state" but how does it affect the relay?
Is the button physically connected to the relay or should the controller send the new state back and let the receive() function handle the actual relay switching?
Also, after presentation, shouldn't there be a send() to the controller?

[korttoma]

@Efflon you are right about the loop() function it seems like the part where it should change the relay state is missing. Did you try to use this example code?

The button should be wired between PIN 3 and GND so that when you push the button PIN 3 is Grounded.

PIN 3 is connected to a "Debouncer" in the "setup()" ( so that when you push the button the code detects only one push and not several ).

loop() monitors the debouncer and when it detects that you have pushed the button it will send the new state to the controller. I think it should also change the state so if it does not do that you could add the following line

digitalWrite(RELAY_PIN, state?RELAY_ON:RELAY_OFF); //write new state to relay output

Before this line in the loop() function:
send(msg.set(state?false:true), true); // Send new state and request ack back

You could also add the line:
saveState(CHILD_ID, state); // Store state in eeprom

To the same part of the code so that the state change is written to eeprom so that the previous state can be returned after a power failure.

[Efflon]

@korttoma
Thanks for the explanation! Just as I suspected with missing relay code.

[Boots33]

@Efflon said:

I'm trying to wrap my head around the button example and don't understand what the loop() really does. To me it only alters the "state" but how does it affect the relay?
Is the button physically connected to the relay or should the controller send the new state back and let the receive() function handle the actual relay switching?

The loop in the relay with button actuator sketch does three main things

checks for a new button push
changes the current state
Sends the new state to the controller

If you look at the message code you can see it also asks for an ACK back from the controller. That is the true at the end of the line.

send(msg.set(state?false:true), true);                         // Send new state and request ack back

It is this returned ACK that is used to switch the relay to the new state in the void receive function

The one drawback in this code if it is used for say a light switch is that if this node looses contact with the controller then the relay cannot be changed by pressing the button.

[Efflon]

@Boots33 Ok, you explanation is what was my only explanation to the "missing" code. When experimenting with this using the mqtt gateway sketch and home-assistant as controller, the ACK is just an ACK and not a "real" message with payload thus just toggling the state bool and getting things out of sync..

[Woeka]

I did not get the example working properly with my 8 channel SSR. So here is my updated version of the example.

I have changed the way the pins are assigned by using a array. The current example tries to connect relays 7 and 8 to pins 9 and 10 when you select an 8 channel relays. This won't work because those pins are used by the radio module.

I think you can connect a relays to any pin which is not used. If so this will make it possible to connect up to 14 relays to the mini pro when also the pins A5-A7 are available.

// Enable debug prints to serial monitor
#define MY_DEBUG

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

// Enable repeater functionality for this node
#define MY_REPEATER_FEATURE

#include <MySensors.h>

const int PINS[] = {3, 4, 5, 6, 7, 8, 14, 15}; // I/O pins 3, 4, 5, 6, 7, 8, A0, A1 for the relays 
#define NUMBER_OF_RELAYS 8 // 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


void before()
{
    for (int sensor=1; sensor<=NUMBER_OF_RELAYS; sensor++) {
        // Then set relay pins in output mode
        pinMode(PINS[sensor-1], OUTPUT);
        // Set relay to last known state (using eeprom storage)
        digitalWrite(PINS[sensor-1], 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; sensor<=NUMBER_OF_RELAYS; sensor++) {
        // 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.type==V_STATUS) {
        // Change relay state
        digitalWrite(PINS[message.sensor-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());
    }
}

[Samuel235]

I'm attempting to get my double relay board containing two switch inputs. I see that the two sketches suggested on the relay page are there but one seems to be updated to the new version which allows you to use multiple relays on the board but the other isn't, as far as i can see. How do I go about making the sketch with buttons accept more relays?

[ijobain]

Hi @Woeka
I've been testing your code, but works inverse mode
if switch in domoticz is on the relay is off and vice versa

[Boots33]

@ijobain Try changing

#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

To

#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

and see if that works as you expected

[Boots33]

@Samuel235 Have a look at this thread for some ideas.

[ijobain]

@Boots33
Thank you so much
I am newbie

[Samuel235]

@Boots33 - Thanks dude, I have had a quick skim read just but will bookmark it when i get my gateway working. These issues right now are driving me insane, and spending the day to try and find the problem. Thank you for linking me to that post!

[Rene046]

I just tried this sketch, works on latest version, but i cant seen any relais in Domoticz, only see the node relais, did i miss something

[HenryWhite]

@Rene046 you could try my sketch: https://forum.mysensors.org/topic/6638/multiple-relays-motion-sketch-fully-customizable-optional-timer-manual-override

[Rene046]

@HenryWhite

thx

[sineverba]

Hi to all!
I would edit the secure relay sketch so in loop the node sends to the gateway, let's say every hours, his state (on or off).

1. I avoid delay otherwise Arduino cannot receive the comands from gateway, so I will use the millis sketch, modified from the official Arduino website.

My doubt is... How can I get the current state of the relay?

Relevant part of sketch is in loop and before setup()

/* TIME variables */
unsigned long previousMillis = 0;        // will store last time state is sent
// constants won't change:
const long interval = 10000;           // interval at which to send state (milliseconds === seconds x 1000). For test we try every 10 seconds

And the main loop

void loop()
{

  // check to see if it's time to send state; that is, if the difference
  // between the current time and last time you sent state is bigger than
  // the interval at which you want to send the state.
  unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval) {
    // save the last time you blinked the LED
    previousMillis = currentMillis;

    // send the state here!
    // test
    Serial.println("This is the moment where I need to send state");

    //send(?????????); // Send current state. Probabily will update also the log?
  }

The base sketch is >>> https://github.com/mysensors/MySensors/blob/master/examples/SecureActuator/SecureActuator.ino

And the millis example is >>> https://www.arduino.cc/en/Tutorial/BlinkWithoutDelay

Thank you to all!

[sineverba]

@sineverba
Edit:
I did edit the pre-setup configuration

int val = 0;  // the value of digital pin
#define CHILD_ID 1   // Id of the sensor child
MyMessage msg(CHILD_ID,V_LIGHT);

And I did edit the loop:

if (currentMillis - previousMillis >= interval) {
    // save the last time you blinked the LED
    previousMillis = currentMillis;

    // send the state here!
    // test
    Serial.println("This is the moment where I need to send state");

    val = digitalRead(LOCK_1);

    
    Serial.print("Il valore del relay è ");
    Serial.println(val);

    send(msg.set(val),true); // Send new state and request ack back. 
  }

I got the update in Domoticz in Hardware > Configuration > Children of nodes

And I did test also every 3 seconds, all ok.

But I don't have the refresh in "main page":

I did test removing current to Arduino when Relay was ON. With Arduino off, I did change the state in domoticz to OFF.

Because Arduino save previous state in EEPROM, after full start the relay did go ON, in Domoticz got "1" in children (all right, because digitalRead was 1) but main panel shows OFF.

I did expect a graphical change...

Thank you (and hope that all is clear) :)