Created
October 16, 2017 19:48
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| <html> | |
| <head> | |
| <title>Bluetooth Demo</title> | |
| </head> | |
| <body> | |
| <button type="button" id="connect">Connect</button> | |
| <button type="button" id="fire">FIRE</button> | |
| <input type="range" max="1023" min="0" value="512" id="pan" /> | |
| <input type="range" max="1023" min="0" value="512" id="tilt" style="transform: rotate(-90deg); transform-origin: bottom right;" | |
| /> | |
| <script type="text/javascript" src="script.js"></script> | |
| </body> | |
| </html> |
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| let CONNECTED = false; | |
| let INTERVAL = null; | |
| let CHAR = null; | |
| let DEVICE = null; | |
| let button = document.getElementById('connect'); | |
| let fireButton = document.getElementById('fire'); | |
| let pan = document.getElementById('pan'); | |
| let tilt = document.getElementById('tilt'); | |
| button.addEventListener('click', connect); | |
| fireButton.addEventListener('click', fire); | |
| pan.addEventListener('mouseup', () => { | |
| pan.value = 512; | |
| }); | |
| tilt.addEventListener('mouseup', () => { | |
| tilt.value = 512; | |
| }); | |
| function connect() { | |
| if (CONNECTED && DEVICE) { | |
| return DEVICE.gatt.disconnect(); | |
| button.innerHTML = 'Connect'; | |
| clearInterval(INTERVAL); | |
| } | |
| navigator.bluetooth | |
| .requestDevice({ | |
| filters: [ | |
| { | |
| services: ['0000ffe0-0000-1000-8000-00805f9b34fb'], | |
| }, | |
| ], | |
| }) | |
| .then(device => { | |
| DEVICE = device; | |
| CONNECTED = true; | |
| button.innerHTML = 'Disconnect'; | |
| return device.gatt.connect(); | |
| }) | |
| .then(server => { | |
| return server.getPrimaryService('0000ffe0-0000-1000-8000-00805f9b34fb'); | |
| }) | |
| .then(service => { | |
| return service.getCharacteristic('0000ffe1-0000-1000-8000-00805f9b34fb'); | |
| }) | |
| .then(char => { | |
| CHAR = char; | |
| INTERVAL = setInterval(updatePanTilt, 200); | |
| }) | |
| .catch(error => { | |
| console.log(error); | |
| }); | |
| } | |
| function updatePanTilt() { | |
| if (CONNECTED && DEVICE && CHAR) { | |
| let p = parseInt(pan.value).toFixed(); | |
| let t = parseInt(tilt.value).toFixed(); | |
| let str = `${p}|${t}$`; | |
| var enc = new TextEncoder('utf-8'); | |
| CHAR.writeValue(enc.encode(str).buffer); | |
| } | |
| } | |
| function fire() { | |
| if (CONNECTED && DEVICE && CHAR) { | |
| let str = 'FIRE$'; | |
| var enc = new TextEncoder('utf-8'); | |
| CHAR.writeValue(enc.encode(str).buffer); | |
| } | |
| } |
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