Created
June 4, 2016 16:53
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Javascript Espruino Script to control WS2812b LEDs
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| var ESP8266 = require("ESP8266"), | |
| Wifi = require("Wifi"), | |
| curCol = '050505', | |
| index = '<title>Brightness</title><script src="//cdnjs.cloudflare.com/ajax/libs/jscolor/2.0.4/jscolor.js"></script><form><label>Color: <input class="jscolor {onFineChange:\'update(this)\'}" value="00FF00" name="color"><br><input type="submit"><script>var xhttp = new XMLHttpRequest();var lastReq = 0;function update(jscolor) {if(lastReq+250 < Date.now()){lastReq=Date.now();xhttp.open("GET", "?color=" + jscolor, true);xhttp.send();}}</script>', | |
| arr = new Uint8ClampedArray(111*3); | |
| function onPageRequest(req, res) { | |
| var a = url.parse(req.url, true); | |
| if(a.search !== null){ | |
| if(a.search.indexOf("color")){ | |
| curCol = a.search.split('=')[1]; | |
| updateLEDs(hexToRgb(curCol)); | |
| } | |
| } | |
| if(a.pathname=="/"){ | |
| res.writeHead(200, {'Content-Type': 'text/HTML'}); | |
| res.end(index.replace('value=""', 'value="' + curCol + '"')); | |
| } else if (a.pathname=="/hello") { | |
| res.writeHead(200, {'Content-Type': 'text/plain'}); | |
| res.end("Hello World"); | |
| } else { | |
| res.writeHead(404, {'Content-Type': 'text/plain'}); | |
| res.end("404: Page "+a.pathname+" not found"); | |
| } | |
| } | |
| function hexToRgb(hex) { | |
| var bigint = parseInt(hex, 16); | |
| var r = (bigint >> 16) & 255; | |
| var g = (bigint >> 8) & 255; | |
| var b = bigint & 255; | |
| return {"r":r, "g":g, "b":b}; | |
| } | |
| function updateLEDs(color){ | |
| for (var i=0;i<arr.length;i+=3) { | |
| arr[i ] = color.g; | |
| arr[i+1] = color.r; | |
| arr[i+2] = color.b; | |
| } | |
| ESP8266.neopixelWrite(NodeMCU.D1, arr); | |
| } | |
| function onInit(){ | |
| console.log(Wifi.getIP().ip); | |
| require("http").createServer(onPageRequest).listen(80); | |
| updateLEDs(hexToRgb(curCol)); | |
| } | |
| onInit(); |
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