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index.js
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index.js
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const gpio = require('pigpio').Gpio;
const hap = require("hap-nodejs");
const Accessory = hap.Accessory;
const Characteristic = hap.Characteristic;
const CharacteristicEventTypes = hap.CharacteristicEventTypes;
const Service = hap.Service;
const accessoryUuid = hap.uuid.generate("basementmaker.projects.rgbledstrip");
const accessory = new Accessory("RGB LED Strip Accesssory", accessoryUuid);
const lightService = new Service.Lightbulb("RGB LED Strip");
const onCharacteristic = lightService.getCharacteristic(Characteristic.On);
const brightnessCharacteristic = lightService.getCharacteristic(Characteristic.Brightness);
const hueCharacteristic = lightService.getCharacteristic(Characteristic.Hue);
const saturationCharacteristic = lightService.getCharacteristic(Characteristic.Saturation);
var showLogging = false;
var LEDstripStatusIsOn = false;
var currentLEDbrightness = 0;
var hue = 0;
var saturation = 0;
var redLED = new gpio(17, {mode: gpio.OUTPUT});
var greenLED = new gpio(22, {mode: gpio.OUTPUT});
var blueLED = new gpio(24, {mode: gpio.OUTPUT});
redLED.pwmWrite(0);
greenLED.pwmWrite(0);
blueLED.pwmWrite(0);
var redValue = 0;
var greenValue = 0;
var blueValue = 0;
var brightnessChanged = false;
var hueChanged = false;
var saturationChanged = false;
const changeColor = function () {
if ( (hueChanged && saturationChanged) || brightnessChanged ) {
if (showLogging) { console.log("changing color ..."); }
var h, s, v;
var r, g, b;
h = hue/360;
s = saturation/100;
v = currentLEDbrightness/100;
var i = Math.floor(h * 6);
var f = h * 6 - i;
var p = v * (1 - s);
var q = v * (1 - f * s);
var t = v * (1 - (1 - f) * s);
switch(i % 6){
case 0: r = v, g = t, b = p; break;
case 1: r = q, g = v, b = p; break;
case 2: r = p, g = v, b = t; break;
case 3: r = p, g = q, b = v; break;
case 4: r = t, g = p, b = v; break;
case 5: r = v, g = p, b = q; break;
}
r = Math.floor(r * 255);
g = Math.floor(g * 255);
b = Math.floor(b * 255);
if ( r < 25 ) { r = 0 } // helper for poor performing rgb leds, they are too bright at low values. comment out line if needed
if ( g < 25 ) { g = 0 } // same as ^
if ( b < 25 ) { b = 0 } // same as ^
redValue = r;
greenValue = g;
blueValue = b;
if (showLogging) { console.log("Red: "+r); }
if (showLogging) { console.log("Green: "+g); }
if (showLogging) { console.log("Blue: "+b); }
if ( LEDstripStatusIsOn ) {
redLED.pwmWrite(r);
greenLED.pwmWrite(g);
blueLED.pwmWrite(b);
}
brightnessChanged = false;
hueChanged = false;
saturationChanged = false;
}
}
onCharacteristic.on(CharacteristicEventTypes.GET, callback => {
if (showLogging) { console.log("Is RGB LED Strip On?: " + LEDstripStatusIsOn); }
callback(undefined, LEDstripStatusIsOn);
});
onCharacteristic.on(CharacteristicEventTypes.SET, (value, callback) => {
if (showLogging) { console.log("Setting RGB LED Strip On: " + value); }
if (showLogging) { console.log("LEDstripStatusIsOn: " + LEDstripStatusIsOn); }
if ( value == true && LEDstripStatusIsOn == false) {
if ( currentLEDbrightness == 0 ) {
currentLEDbrightness = 100;
hue = 251;
saturation = 5;
brightnessChanged = true;
hueChanged = true;
saturationChanged = true;
changeColor();
} else {
redLED.pwmWrite(redValue);
greenLED.pwmWrite(greenValue);
blueLED.pwmWrite(blueValue);
}
} else if ( value == false ) {
redLED.pwmWrite(0);
greenLED.pwmWrite(0);
blueLED.pwmWrite(0);
} else {
// do nothing
}
LEDstripStatusIsOn = value;
callback();
});
brightnessCharacteristic.on(CharacteristicEventTypes.GET, (callback) => {
if (showLogging) { console.log("Current Strip brightness level?: " + currentLEDbrightness); }
callback(undefined, currentLEDbrightness);
});
brightnessCharacteristic.on(CharacteristicEventTypes.SET, (value, callback) => {
if (showLogging) { console.log("Setting Strip brightness level to: " + value); }
var val = parseInt(255*(value/100), 10);
currentLEDbrightness = Math.ceil((val/255)*100);
brightnessChanged = true;
changeColor();
callback();
});
hueCharacteristic.on(CharacteristicEventTypes.GET, (callback) => {
if (showLogging) { console.log("Current Hue level?: " + hue); }
callback(undefined, currentLEDbrightness);
});
hueCharacteristic.on(CharacteristicEventTypes.SET, (value, callback) => {
if (showLogging) { console.log("Setting Hue to: " + value); }
hue = value;
hueChanged = true;
changeColor();
callback();
});
saturationCharacteristic.on(CharacteristicEventTypes.GET, (callback) => {
if (showLogging) { console.log("Current Saturation?: " + saturation); }
callback(undefined, currentLEDbrightness);
});
saturationCharacteristic.on(CharacteristicEventTypes.SET, (value, callback) => {
if (showLogging) { console.log("Setting Saturation to: " + value); }
saturation = value;
saturationChanged = true;
changeColor();
callback();
});
accessory.addService(lightService);
accessory.publish({
username: "BB:00:00:00:00:02",
pincode: "000-00-123",
port: 47129,
category: hap.Categories.LIGHTBULB
});
console.log("Running!");
console.log("Device Pin Code: 000-00-123");