Most reliable light switch

  • I'm moving to Vera+MySensors and will do all light management under MySensors.
    Months before I raised a discussion to allow node to be operated individually, even if it's not connected to MySensor network. Unfortunately, it will not happen - once node is not connected - it will stop working.

    I definitely don't want to put my house in the dark because something went wrong. Does anybody created a reliable switch, based (maybe) on MySensor node + (say) Arduino ? Can anybody share good experience?

  • I am working on such a node, but am still in the programming and testing stage. I will come back here when I have positive results!

  • @DavidZH, sounds promising. Give me something for tests, I will spend next few months on this.

  • Hero Member


    The information in these posts may be of use.



    In mySensors V2.1 the basic sketch for a switch that will work even if the controller/gateway is down would look something like this

    // Enable debug prints to serial monitor
    #define MY_DEBUG
    // Enable and select radio type attached
    #define MY_RADIO_NRF24
    #define MY_TRANSPORT_WAIT_READY_MS 3000     //set how long to wait for transport ready.
    #include <SPI.h>
    #include <MySensors.h>
    #include <Bounce2.h>
    #define RELAY_PIN  4  // 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 1
    #define RELAY_OFF 0
    Bounce debouncer = Bounce();
    int oldValue = 0;
    bool state;
    MyMessage msg(CHILD_ID, V_STATUS);
    void setup()
      pinMode(BUTTON_PIN, INPUT);              // Setup the button pin  
      digitalWrite(BUTTON_PIN, HIGH);           // Activate internal pull-up
      // After setting up the button, setup debouncer
      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()
      // Get the update value
      int value =;
      if (value != oldValue && value == 0) {                          // check for new button push
        state =  !state;                                               //Toggle the state
        send(msg.set(state), false);                                   // send new state to controller, no ack requested
        digitalWrite(RELAY_PIN, state ? RELAY_ON : RELAY_OFF);         // switch the relay to the new state
      oldValue = value;
    void receive(const MyMessage &message) {
      // We only expect one type of message from controller. But we better check anyway.
      if (message.type == V_STATUS) {
        state = message.getBool();                                  // get the current state
        digitalWrite(RELAY_PIN, state ? RELAY_ON : RELAY_OFF);      // switch relay to current state
        // Write some debug info
        Serial.print("Incoming change for sensor:");
        Serial.print(", New status: ");

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