Things/things/DeviceLed.h

#ifndef DEVICELED_H
#define DEVICELED_H

#include "Device.h"
#include <Homie.h>

class DeviceLed : public Device {
  public:
    inline DeviceLed(byte ledRed, byte ledGreen, byte ledBlue) {
      pinRed = ledRed;
      pinGreen = ledGreen;
      pinBlue = ledBlue;
    }
    virtual void setup();
    virtual void homieRegister();
    virtual void loop();
    bool ledOnHandler(String value);
    bool ledColorHandler(String message);
  private:
    byte pinRed;
    byte pinGreen;
    byte pinBlue;
    int led_red = 0;
    int led_green = 0;
    int led_blue = 0;
    HomieNode ledNode{"led", "rgb"};
};

void DeviceLed::setup() {
  pinMode(pinRed, OUTPUT);
  pinMode(pinGreen, OUTPUT);
  pinMode(pinBlue, OUTPUT);
  analogWrite(pinRed, led_red);
  analogWrite(pinGreen, led_green);
  analogWrite(pinBlue, led_blue);
}

bool DeviceLed::ledOnHandler(String value) {
  if (value == "true") {
    analogWrite(pinRed, led_red);
    analogWrite(pinGreen, led_green);
    analogWrite(pinBlue, led_blue);
    Homie.setNodeProperty(ledNode, "on", "true");
    Serial.println("led is on");
  } else if (value == "false") {
    analogWrite(pinRed, 0);
    analogWrite(pinGreen, 0);
    analogWrite(pinBlue, 0);
    Homie.setNodeProperty(ledNode, "on", "false");
    Serial.println("led is off");
  } else {
    return false;
  }
  return true;
}

bool DeviceLed::ledColorHandler(String message) {
  DynamicJsonBuffer json_inBuffer;
  JsonObject& json_in = json_inBuffer.parseObject(message);
  if (json_in.success()) {
    if (json_in.containsKey("red")) {
      led_red = json_in["red"];
      analogWrite(pinRed, led_red);
    }
    if (json_in.containsKey("green")) {
      led_green = json_in["green"];
      analogWrite(pinGreen, led_green);
    }
    if (json_in.containsKey("blue")) {
      led_blue = json_in["blue"];
      analogWrite(pinBlue, led_blue);
    }
  } else {
    Serial.println("parsing of JSON failed");
  }

  DynamicJsonBuffer json_outBuffer;
  JsonObject& json_out = json_outBuffer.createObject();
  json_out["red"] = led_red;
  json_out["green"] = led_green;
  json_out["blue"] = led_blue;
  String response;
  json_out.printTo(response);
  Serial.print("led state: ");
  Serial.println(response);
  Homie.setNodeProperty(ledNode, "color", response);
  return true;
}

void DeviceLed::homieRegister() {
  ledNode.subscribe("on", [this](String value) { return ledOnHandler(value); });
  ledNode.subscribe("color", [this](String value) { return ledColorHandler(value); });
  Homie.registerNode(ledNode);
}

void DeviceLed::loop() {
  return;
}

#endif