135 lines
4.2 KiB
JavaScript
135 lines
4.2 KiB
JavaScript
// UUID list
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// https://bitbucket.org/bluetooth-SIG/public/src/main/assigned_numbers/uuids/characteristic_uuids.yaml
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const serviceFTMS = 0x1826;
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const rowerData = 0x2ad1;
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function connect() {
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console.log('Requesting FTMS Bluetooth Device...');
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return navigator.bluetooth.requestDevice({
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filters: [{
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services: [serviceFTMS],
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}]
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})
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.then(device => {
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// Human-readable name of the device.
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console.log('Device name: ' + device.name);
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console.log('Connecting to GATT Server...');
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return device.gatt.connect();
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})
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.then(server => {
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console.log('Getting Service...');
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return server.getPrimaryService(serviceFTMS);
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})
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.then(service => {
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console.log('Getting Characteristic...');
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return service.getCharacteristic(rowerData);
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})
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.then(characteristic => {
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characteristic.startNotifications().then(_ => {
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console.log('> Notifications started');
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document.querySelector(".btButton").style.display="none"; //todo show device name div instead (and later on add reconnect button if connection fails)
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document.querySelector(".setupinfo").style.display="none";
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document.querySelector(".training").style.display="block";
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});
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return characteristic;
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})
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.catch(error => {
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console.log('Argh! ' + error);
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});
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}
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// Field descriptions and lengths:
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// https://bitbucket.org/bluetooth-SIG/public/src/main/gss/org.bluetooth.characteristic.rower_data.yaml
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function parseRowerData(value) {
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let a = [];
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// Convert raw data bytes to hex values in order to console log each notification.
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for (let i = 0; i < value.byteLength; i++) {
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a.push('0x' + ('00' + value.getUint8(i).toString(16)).slice(-2));
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}
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console.log('> ' + a.join(' '));
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var flags = value.getUint16(0, littleEndian = true);
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let byteIndex = 2;
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var data = [];
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if ((flags & (1 << 0)) == 0) {
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data['Stroke Rate'] = value.getUint8(byteIndex, littleEndian = true);
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byteIndex += 1;
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data['Stroke Count'] = value.getUint16(byteIndex, littleEndian = true);
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byteIndex += 2;
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}
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if ((flags & (1 << 1)) != 0) {
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data['Average Stroke Rate'] = value.getUint8(byteIndex, littleEndian = true);
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byteIndex += 1;
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}
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if ((flags & (1 << 2)) != 0) {
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data['Total Distance'] = value.getUint16(byteIndex, littleEndian = true) + (value.getUint8(byteIndex + 2, littleEndian = true) << 16);
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byteIndex += 3;
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}
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if ((flags & (1 << 3)) != 0) {
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data['Instantaneous Pace'] = value.getUint16(byteIndex, littleEndian = true);
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byteIndex += 2;
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}
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if ((flags & (1 << 4)) != 0) {
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data['Average Pace'] = value.getUint16(byteIndex, littleEndian = true);
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byteIndex += 2;
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}
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if ((flags & (1 << 5)) != 0) {
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data['Instantaneous Power'] = value.getInt16(byteIndex, littleEndian = true);
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byteIndex += 2;
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}
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if ((flags & (1 << 6)) != 0) {
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data['Average Power'] = value.getInt16(byteIndex, littleEndian = true);
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byteIndex += 2;
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}
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if ((flags & (1 << 7)) != 0) {
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data['Resistance Level'] = value.getUint8(byteIndex, littleEndian = true);
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byteIndex++;
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}
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if ((flags & (1 << 8)) != 0) {
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data['Total Energy'] = value.getUint16(byteIndex, littleEndian = true);
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byteIndex += 2;
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data['Energy Per Hour'] = value.getUint16(byteIndex, littleEndian = true);
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byteIndex += 2;
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data['Energy Per Minute'] = value.getUint8(byteIndex, littleEndian = true);
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byteIndex += 1;
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}
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if ((flags & (1 << 9)) != 0) {
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data['Heart Rate'] = value.getUint8(byteIndex, littleEndian = true);
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byteIndex += 1;
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}
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if ((flags & (1 << 10)) != 0) {
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data['Metabolic Equivalent'] = value.getUint8(byteIndex, littleEndian = true);
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byteIndex += 1;
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}
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if ((flags & (1 << 11)) != 0) {
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data['Elapsed Time'] = value.getUint16(byteIndex, littleEndian = true);
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byteIndex += 2;
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}
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if ((flags & (1 << 12)) != 0) {
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data['Remaining Time'] = value.getUint16(byteIndex, littleEndian = true);
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byteIndex += 2;
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}
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return data;
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} |