Added Espruino wifi led strip
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# Espruino WiFi - LED Strip
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## Features
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- Control LED strip via MQTT
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- Built in Home Assistant support
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- RGB colour support
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- Built in effects - chaser, random and disco
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## Setup
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Populate the variables at the top of index.js with your WiFi and MQTT details then flash to an Espruino WiFi.
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## Usage
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const WIFI_NAME = "";
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const WIFI_KEY = "";
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const MQTT_HOST = "";
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const MQTT_PORT = "";
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const MQTT_USER = "";
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const MQTT_PASS = "";
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const DEVICE_NAME = "";
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const LED_COUNT = 44;
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const Clock = require("clock").Clock;
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var clk = new Clock();
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const wifi = require("Wifi");
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const http = require("http");
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var mqtt;
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var intervalId;
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var configTopic = `homeassistant/light/${DEVICE_NAME}_Light/config`;
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var rootTopic = `custom/light/${DEVICE_NAME}_Light`;
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var config = {
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"~": rootTopic,
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"cmd_t": "~/set",
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"stat_t": "~/state",
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"device": {
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"manufacturer": "Espruino",
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"model": "WiFi",
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"identifiers": getSerial(),
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"sw_version": "0.0.1",
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"name": `${DEVICE_NAME}_Light`
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},
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"name": `${DEVICE_NAME}_Light`,
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"schema": "json",
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"unique_id": getSerial(),
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"effect": true,
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"effect_list": ["none", "chaser", "random", "disco"],
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"rgb": true
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};
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var lastSeenIntervalId;
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var state = {
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"last_seen": clk.getDate().toISOString(),
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"color":{"r":0,"g":0,"b":0},
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"state":"OFF"
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};
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function updateLight() {
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var ledArr = new Uint8ClampedArray(LED_COUNT*3);
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var r = state.color.r;
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var g = state.color.g;
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var b = state.color.b;
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if (state.state === "OFF") {
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r = g = b = 0;
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} else if (r == 0 && g == 0 && b == 0) {
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r = g = b = 255;
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state.color.r = state.color.g = state.color.b = 255;
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}
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if (intervalId) clearInterval(intervalId);
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switch(state.effect) {
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case "chaser":
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var pos = 0;
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var getPattern = function() {
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pos = (pos + 1) % LED_COUNT;
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ledArr[pos * 3 + 0] = g;
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ledArr[pos * 3 + 1] = r;
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ledArr[pos * 3 + 2] = b;
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for(var i = 0; i < LED_COUNT * 3; i++) {
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ledArr[i] *= 0.9;
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}
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return ledArr;
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};
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intervalId = setInterval(function() {
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require("neopixel").write(B15, getPattern());
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}, 50);
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break;
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case "disco":
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var getPattern = function() {
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r = Math.floor(Math.random() * 256);
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g = Math.floor(Math.random() * 256);
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b = Math.floor(Math.random() * 256);
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for(var i=0;i<ledArr.length;) {
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ledArr[i++] = g;
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ledArr[i++] = r;
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ledArr[i++] = b;
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}
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return ledArr;
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};
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intervalId = setInterval(function() {
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require("neopixel").write(B15, getPattern());
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}, 200);
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break;
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case "random":
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r = Math.floor(Math.random() * 256);
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g = Math.floor(Math.random() * 256);
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b = Math.floor(Math.random() * 256);
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default:
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for(var i=0;i<ledArr.length;) {
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ledArr[i++] = g;
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ledArr[i++] = r;
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ledArr[i++] = b;
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}
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require("neopixel").write(B15, ledArr);
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break;
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}
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}
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function setState(newState) {
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state = Object.assign(state, newState);
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updateLight();
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state.last_seen = clk.getDate().toISOString();
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mqtt.publish(rootTopic + "/state", JSON.stringify(state));
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}
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function onConnect() {
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console.log("MQTT connected");
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// Expose capabilities to HomeAssistant
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mqtt.publish(configTopic, JSON.stringify(config), { retain: true });
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// watch for updates
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mqtt.subscribe(rootTopic + "/set");
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console.log("Subscribed");
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setState(state);
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lastSeenIntervalId = setInterval(function() {
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state.last_seen = clk.getDate().toISOString();
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mqtt.publish(rootTopic + "/state", JSON.stringify(state));
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}, 60*1000);
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}
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function onDisconnect() {
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console.log("MQTT disconnected");
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clearInterval(lastSeenIntervalId);
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mqtt.connect();
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}
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function onMessage(pub) {
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console.log("MQTT => ", pub.message);
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var msg = JSON.parse(pub.message);
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setState(msg);
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}
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function onInit() {
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console.log("Connecting to WiFi");
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wifi.connect(WIFI_NAME, { password : WIFI_KEY }, function(err) {
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if (err) {
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console.log("WiFi Connection error: "+err);
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return setTimeout(onInit, 1000);
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}
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});
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wifi.on('connected', function() {
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console.log("Connected to WiFi");
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http.get("http://www.espruino.com", function(res) {
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clk = new Clock(res.headers.Date);
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console.log("Connecting to MQTT");
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mqtt = require("MQTT").connect({
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host: MQTT_HOST,
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port: MQTT_PORT,
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username: MQTT_USER,
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password: MQTT_PASS
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});
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mqtt.on('connected', onConnect);
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mqtt.on('publish', onMessage);
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mqtt.on("disconnected", onDisconnect);
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});
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});
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wifi.on('disconnected',function() {
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console.log("WiFi disconnected");
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return setTimeout(onInit, 1000);
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});
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}
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