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36 lines
1.2 KiB
HTML
36 lines
1.2 KiB
HTML
<!DOCTYPE html>
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<html>
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<title>Battery Level</title>
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<body>
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<button type="button" onclick="onButtonClick()">Get Bluetooth Device's Battery Level</button>
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<pre id="log"></pre>
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<script src="bluetooth_functions.js"></script>
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<script>
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function onButtonClick() {
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clear();
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var options = {filters: [{services: ['battery_service']}], optionalServices: []};
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try {
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log('Requesting Bluetooth Device...');
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var bluetooth = window.navigator.bluetooth;
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var device = bluetooth.requestDevice(options);
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log('Connecting to GATT Server on device...');
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var server = device.gatt.connect();
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log('Getting Battery Service...');
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var service = server.getPrimaryService('battery_service');
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log('Getting Battery Level Characteristic...');
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var characteristic = service.getCharacteristic('battery_level');
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log('Reading Battery Level...');
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var value = asciiToDecimal(characteristic.readValue());
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log('> Battery Level is ' + value + '%');
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} catch(err) {
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log(err);
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}
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}
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</script>
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</body>
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</html>
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