DimmableLEDActuator.ino

/*
 * 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 <[email protected]>
 * Copyright (C) 2013-2019 Sensnology AB
 * Full contributor list: https://github.com/mysensors/MySensors/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 - February 15, 2014 - Bruce Lacey
 * Version 1.1 - August 13, 2014 - Converted to 1.4 (hek)
 *
 * DESCRIPTION
 * This sketch provides a Dimmable LED Light using PWM and based Henrik Ekblad
 * <[email protected]> Vera Arduino Sensor project.
 * Developed by Bruce Lacey, inspired by Hek's MySensor's example sketches.
 *
 * The circuit uses a MOSFET for Pulse-Wave-Modulation to dim the attached LED or LED strip.
 * The MOSFET Gate pin is connected to Arduino pin 3 (LED_PIN), the MOSFET Drain pin is connected
 * to the LED negative terminal and the MOSFET Source pin is connected to ground.
 *
 * This sketch is extensible to support more than one MOSFET/PWM dimmer per circuit.
 * http://www.mysensors.org/build/dimmer
 */
 
// Enable debug prints to serial monitor
#define MY_DEBUG
 
// Enable and select radio type attached
#define MY_RADIO_RF24
//#define MY_RADIO_NRF5_ESB
//#define MY_RADIO_RFM69
//#define MY_RADIO_RFM95
 
#include <MySensors.h>
 
#define SN "DimmableLED"
#define SV "1.1"
 
#define LED_PIN 3      // Arduino pin attached to MOSFET Gate pin
#define FADE_DELAY 10  // Delay in ms for each percentage fade up/down (10ms = 1s full-range dim)
 
static int16_t currentLevel = 0;  // Current dim level...
MyMessage dimmerMsg(0, V_DIMMER);
MyMessage lightMsg(0, V_LIGHT);
 
 
/***
 * Dimmable LED initialization method
 */
void setup()
{
    // Pull the gateway's current dim level - restore light level upon node power-up
    request( 0, V_DIMMER );
}
 
void presentation()
{
    // Register the LED Dimmable Light with the gateway
    present( 0, S_DIMMER );
 
    sendSketchInfo(SN, SV);
}
 
/***
 *  Dimmable LED main processing loop
 */
void loop()
{
}
 
 
 
void receive(const MyMessage &message)
{
    if (message.getType() == V_LIGHT || message.getType() == V_DIMMER) {
 
        //  Retrieve the power or dim level from the incoming request message
        int requestedLevel = atoi( message.data );
 
        // Adjust incoming level if this is a V_LIGHT variable update [0 == off, 1 == on]
        requestedLevel *= ( message.getType() == V_LIGHT ? 100 : 1 );
 
        // Clip incoming level to valid range of 0 to 100
        requestedLevel = requestedLevel > 100 ? 100 : requestedLevel;
        requestedLevel = requestedLevel < 0   ? 0   : requestedLevel;
 
        Serial.print( "Changing level to " );
        Serial.print( requestedLevel );
        Serial.print( ", from " );
        Serial.println( currentLevel );
 
        fadeToLevel( requestedLevel );
 
        // Inform the gateway of the current DimmableLED's SwitchPower1 and LoadLevelStatus value...
        send(lightMsg.set(currentLevel > 0));
 
        // hek comment: Is this really nessesary?
        send( dimmerMsg.set(currentLevel) );
 
 
    }
}
 
/***
 *  This method provides a graceful fade up/down effect
 */
void fadeToLevel( int toLevel )
{
 
    int delta = ( toLevel - currentLevel ) < 0 ? -1 : 1;
 
    while ( currentLevel != toLevel ) {
        currentLevel += delta;
        analogWrite( LED_PIN, (int)(currentLevel / 100. * 255) );
        delay( FADE_DELAY );
    }
}