relays do not work using button

  • I have a working temperature compare node and I want to add2 relays with button. I am searching already for of few hours e why the relays are not working after using the buttons.
    Can anyone give me a tip ?

    #include <MySensor.h>
    #include <SPI.h>
    #include <Bounce2.h>
    #include <DallasTemperature.h>
    #include <OneWire.h>
    // Partie Température
    #define COMPARE_TEMP 1 // Send temperature only if changed? 1 = Yes 0 = No
    #define ONE_WIRE_BUS 3 // Pin where dallase sensor is connected 
    #define MAX_ATTACHED_DS18B20 16
    unsigned long SLEEP_TIME = 30000; // Sleep time between reads (in milliseconds)
    OneWire oneWire(ONE_WIRE_BUS); // Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
    DallasTemperature sensors(&oneWire); // Pass the oneWire reference to Dallas Temperature. 
    float lastTemperature[MAX_ATTACHED_DS18B20];
    int numSensors=0;
    boolean receivedConfig = false;
    boolean metric = true; 
    // Initialize temperature message
    MyMessage msg(0,V_TEMP);
    // Partie Relay
    #define RELAY_PIN  A1  // Arduino Digital I/O pinnumber for relay 
    #define BUTTON_PIN  A3   // Arduino Digital I/O pin number for button 
    #define CHILD_ID 17   // Id of the sensor child
    #define RELAY_PIN_1  A2  // Arduino Digital I/O pinnumber for relay 
    #define BUTTON_PIN_1  A4   // Arduino Digital I/O pin number for button 
    #define CHILD_ID_1 18   // Id of the sensor child
    #define RELAY_ON 1
    #define RELAY_OFF 0
    Bounce debouncer = Bounce(); 
    int oldValue=0;
    bool state;
    unsigned long previousMillis = 0;
    MySensor gw;
    MyMessage msg2(CHILD_ID,V_LIGHT);//relay_pin A1
    MyMessage msg3(CHILD_ID,V_LIGHT);//relay_pin A2
    void setup()  
      // Startup up the OneWire library
      // requestTemperatures() will not block current thread
      gw.begin(incomingMessage, AUTO, true);
      // Send the sketch version information to the gateway and Controller
      gw.sendSketchInfo("Relay & Button", "1.0");
      gw.sendSketchInfo("Temperature Sensor", "1.1");
        // Fetch the number of attached temperature sensors  
      numSensors = sensors.getDeviceCount();
      Serial.println(" temperature sensors detected");
     // Setup the button
      // Activate internal pull-up
      // Activate internal pull-up
      // After setting up the button, setup debouncer
      // Present all sensors to controller
      for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {   
         gw.present(i, S_TEMP);
      // Register all sensors to gw (they will be created as child devices)
      gw.present(CHILD_ID, S_LIGHT);
      gw.present(CHILD_ID_1, S_LIGHT);
      // Make sure relays are off when starting up
      digitalWrite(RELAY_PIN, RELAY_OFF);
      // Then set relay pins in output mode
      pinMode(RELAY_PIN, OUTPUT);   
          digitalWrite(RELAY_PIN_1, RELAY_OFF);
      // Then set relay pins in output mode
      pinMode(RELAY_PIN_1, OUTPUT);   
      // Set relay to last known state (using eeprom storage) 
      state = gw.loadState(CHILD_ID);
      digitalWrite(RELAY_PIN, state?RELAY_ON:RELAY_OFF);
      state = gw.loadState(CHILD_ID);
      digitalWrite(RELAY_PIN_1, state?RELAY_ON:RELAY_OFF);
    *  Example on how to asynchronously check for new messages from gw
    void loop() 
      // Relay button
      // Get the update value
      int value =;
      if (value != oldValue && value==0) {
          gw.send(msg2.set(state?false:true), true); // Send new state and request ack back
          gw.send(msg3.set(state?false:true), true);
      oldValue = value;
      // Fetch temperatures from Dallas sensors
      // query conversion time and sleep until conversion completed
      //int16_t conversionTime = sensors.millisToWaitForConversion(sensors.getResolution());
      unsigned long currentMillis = millis();
      // sleep() call can be replaced by wait() call if node need to process incoming messages (or if node is repeater)
      // gw.wait(conversionTime);
    // Read temperatures and send them to controller 
      if (currentMillis - previousMillis >= SLEEP_TIME) {
        // save the last time you read temperature
        previousMillis = currentMillis;
        for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {
          // Fetch and round temperature to one decimal
          float temperature = static_cast<float>(static_cast<int>((gw.getConfig().isMetric?sensors.getTempCByIndex(i):sensors.getTempFByIndex(i)) * 10.)) / 10.;
          // Only send data if temperature has changed and no error
          #if COMPARE_TEMP == 1
          if (lastTemperature[i] != temperature && temperature != -127.00 && temperature != 85.00) {
          if (temperature != -127.00 && temperature != 85.00) {
            // Send in the new temperature
            // Save new temperatures for next compare
    void incomingMessage(const MyMessage &message) {
      // We only expect one type of message from controller. But we better check anyway.
      if (message.isAck()) {
         Serial.println("This is an ack from gateway");
      if (message.type == V_LIGHT) {
         // Change relay state
         state = message.getBool();
         digitalWrite(RELAY_PIN, state?RELAY_ON:RELAY_OFF);
         digitalWrite(RELAY_PIN_1, state?RELAY_ON:RELAY_OFF);
         // Store state in eeprom
         gw.saveState(CHILD_ID, state);
         gw.saveState(CHILD_ID_1, state);
         // Write some debug info
         Serial.print("Incoming change for sensor:");
         Serial.print(", New status: ");
    Insert Code Here

  • Mod

    @Dick the same debouncer instance can't be used for two buttons. You need to create another instance.

    To stay with the naming convention in your sketch, create

    Bounce debouncer_1 = Bounce();

    and change all calls for the second button to use debouncer_1. You'll also need to use different child ids for the two messages.

  • @mfalkvidd
    Thanks for the info. I adjusted what you mentioned but still no reaction. this is what I have changed.

    InBounce debouncer = Bounce(); 
    int oldValue=0;
    bool state;
    Bounce debouncer_1 = Bounce(); 
    int oldValue_1=0;
    bool state_1;
    unsigned long previousMillis = 0;
    MySensor gw;
    MyMessage msg2(CHILD_ID,V_LIGHT);//relay_pin A1
    MyMessage msg3(CHILD_ID_1,V_LIGHT);//relay_pin A2`

  • Mod

    @Dick there are lots of more places that need update. Maybe you should try first to get one relay with one button working? Doing everything at once might be a too steep learning curve.

  • @mfalkvidd
    you are right, i try to make one relay working.

Log in to reply

Suggested Topics

  • 4
  • 2
  • 5
  • 3
  • 274
  • 9