Created
February 15, 2017 14:05
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<!DOCTYPE html> | |
<html lang="en"> | |
<head> | |
<meta charset="UTF-8"> | |
<title>Bluetooth Web API</title> | |
</head> | |
<body> | |
<input class="range" id="r" value="255" max="255" type="range"/> | |
<input class="range" id="g" value="255" max="255" type="range"/> | |
<input class="range" id="b" value="255" max="255" type="range"/> | |
<input class="range" id="o" value="100" type="range"/> | |
<input type="color" class="color" value="#FFFFFF"> | |
<button class="bt">connect</button> | |
<script> | |
const log = console.log.bind(console); | |
const [button] = document.getElementsByClassName('bt') | |
const [color] = document.getElementsByClassName('color') | |
const [r, g, b, o] = document.getElementsByClassName('range') | |
const toBuff = str => { | |
const buf = new ArrayBuffer(str.length) | |
const view = new Uint8Array(buf) | |
for (var i=0; i < str.length; i++) { | |
view[i] = str.charCodeAt(i) | |
} | |
return buf | |
} | |
const send = (lamp, r = 255, g = 255, b = 255, o = 100) => { | |
let command = `${r},${g},${b},${o}` | |
for (var j = command.length; j < 18; j++) { | |
command += ',' | |
} | |
log(command) | |
lamp && lamp.writeValue(toBuff(command)) | |
} | |
const change = lamp => evt => { | |
log(lamp, evt.target.value) | |
send(lamp, r.value, g.value, b.value, o.value) | |
} | |
button.addEventListener('pointerup', function(event) { | |
navigator.bluetooth.requestDevice({ filters: [{ services: [0xFFF0] }] }) | |
.then(device => (log(device), device.gatt.connect())) // | |
.then(server => (log(server), server.getPrimaryService(0xFFF0))) | |
.then(service => (log(service), service.getCharacteristic(0xFFF1) )) | |
.then(ch => (log(ch), ch )) | |
.then(lamp => { | |
const bound = change(lamp) | |
r.addEventListener('change', bound) | |
g.addEventListener('change', bound) | |
b.addEventListener('change', bound) | |
o.addEventListener('change', bound) | |
color.addEventListener('change', evt => { | |
const [_, rx, gx, bx] = /#(.{2})(.{2})(.{2})/.exec(evt.target.value) | |
send(lamp, parseInt(rx, 16), parseInt(gx, 16), parseInt(bx, 16), o.value) | |
}) | |
}) | |
.catch(error => { log(error); }); | |
}); | |
</script> | |
</body> | |
</html> |
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