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October 30, 2016 04:23
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title></title> | |
| <script> | |
| function onButtonClick() { | |
| let filters = []; | |
| filters.push({services: ['battery_service']}); | |
| navigator.bluetooth.requestDevice({filters: filters}) | |
| .then(device => { | |
| return device.gatt.connect(); | |
| }) | |
| .then(server => { | |
| console.log('Getting Battery Service...'); | |
| return server.getPrimaryService('battery_service'); | |
| }) | |
| .then(service => { | |
| console.log('Getting Battery Level Characteristic...'); | |
| return service.getCharacteristic('battery_level'); | |
| }) | |
| .then(characteristic => { | |
| console.log('Reading Battery Level...'); | |
| return characteristic.readValue(); | |
| }) | |
| .then(value => { | |
| let batteryLevel = value.getUint8(0); | |
| console.log('> Battery Level is ' + batteryLevel + '%'); | |
| }) | |
| .catch(error => { | |
| console.log('Argh! ' + error); | |
| }); | |
| } | |
| </script> | |
| </head> | |
| <body> | |
| <button onclick="onButtonClick()">Connect</button> | |
| </body> | |
| </html> |
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