Relay Actuator with momentary (pulse) action



  • What do I need to edit in the relay actuator sketch in order to turn the relay on for about .5 seconds then turn it immediately back off?

    /**
     * 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 <henrik.ekblad@mysensors.org>
     * Copyright (C) 2013-2015 Sensnology AB
     * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
     *
     * Documentation: http://www.mysensors.org
     * Support Forum: http://forum.mysensors.org
     *
     * 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.
     *
     *******************************
     *
     * REVISION HISTORY
     * Version 1.0 - Henrik Ekblad
     *
     * DESCRIPTION
     * Example sketch showing how to control physical relays.
     * This example will remember relay state after power failure.
     * http://www.mysensors.org/build/relay
     */
    
    // 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>
    
    #define RELAY_1  3  // 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_1; 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_1; 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.type==V_STATUS) {
            // Change relay state
            digitalWrite(message.sensor-1+RELAY_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());
        }
    }
    

  • Mod

    @drradkin change

            digitalWrite(message.sensor-1+RELAY_1, message.getBool()?RELAY_ON:RELAY_OFF);
    

    to

    if (message.getBool() == RELAY_ON) {
    digitalWrite(message.sensor-1+RELAY_1, RELAY_ON);
    wait(500);
    digitalWrite(message.sensor-1+RELAY_1, RELAY_OFF);
    }
    

    and

    digitalWrite(pin, loadState(sensor)?RELAY_ON:RELAY_OFF);
    

    to

    if (loadState(sensor) == RELAY_ON) {
    digitalWrite(pin, RELAY_ON);
    wait(500);
    digitalWrite(pin, RELAY_OFF);
    }
    

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