73 lines
2.8 KiB
JavaScript
73 lines
2.8 KiB
JavaScript
'use strict'
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/*
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Open Rowing Monitor, https://github.com/laberning/openrowingmonitor
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Implementation of the StrokeData as defined in:
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https://www.concept2.co.uk/files/pdf/us/monitors/PM5_BluetoothSmartInterfaceDefinition.pdf
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todo: we could calculate all the missing stroke metrics in the RowerEngine
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*/
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import bleno from '@abandonware/bleno'
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import { getFullUUID } from '../Pm5Constants.js'
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import log from 'loglevel'
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import BufferBuilder from '../../BufferBuilder.js'
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export default class StrokeData extends bleno.Characteristic {
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constructor (multiplexedCharacteristic) {
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super({
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// id for StrokeData as defined in the spec
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uuid: getFullUUID('0035'),
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value: null,
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properties: ['notify']
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})
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this._updateValueCallback = null
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this._multiplexedCharacteristic = multiplexedCharacteristic
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}
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onSubscribe (maxValueSize, updateValueCallback) {
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log.debug(`StrokeData - central subscribed with maxSize: ${maxValueSize}`)
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this._updateValueCallback = updateValueCallback
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return this.RESULT_SUCCESS
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}
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onUnsubscribe () {
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log.debug('StrokeData - central unsubscribed')
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this._updateValueCallback = null
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return this.RESULT_UNLIKELY_ERROR
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}
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notify (data) {
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if (this._updateValueCallback || this._multiplexedCharacteristic.centralSubscribed()) {
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const bufferBuilder = new BufferBuilder()
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// elapsedTime: UInt24LE in 0.01 sec
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bufferBuilder.writeUInt24LE(Math.round(data.totalMovingTime * 100))
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// distance: UInt24LE in 0.1 m
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bufferBuilder.writeUInt24LE(Math.round(data.totalLinearDistance * 10))
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// driveLength: UInt8 in 0.01 m
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bufferBuilder.writeUInt8(Math.round(data.driveLength * 100))
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// driveTime: UInt8 in 0.01 s
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bufferBuilder.writeUInt8(Math.round(data.driveDuration * 100))
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// strokeRecoveryTime: UInt16LE in 0.01 s
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bufferBuilder.writeUInt16LE(Math.round(data.recoveryDuration * 100))
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// strokeDistance: UInt16LE in 0.01 s
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bufferBuilder.writeUInt16LE(Math.round(data.cycleDistance * 100))
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// peakDriveForce: UInt16LE in 0.1 lbs
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bufferBuilder.writeUInt16LE(Math.round(data.drivePeakHandleForce * 0.224809 * 10))
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// averageDriveForce: UInt16LE in 0.1 lbs
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bufferBuilder.writeUInt16LE(Math.round(data.driveAverageHandleForce * 0.224809 * 10))
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if (this._updateValueCallback) {
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// workPerStroke is only added if data is not send via multiplexer
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// workPerStroke: UInt16LE in 0.1 Joules
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bufferBuilder.writeUInt16LE(Math.round(data.strokeWork * 10))
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}
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// strokeCount: UInt16LE
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bufferBuilder.writeUInt16LE(data.totalNumberOfStrokes)
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if (this._updateValueCallback) {
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this._updateValueCallback(bufferBuilder.getBuffer())
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} else {
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this._multiplexedCharacteristic.notify(0x35, bufferBuilder.getBuffer())
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}
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return this.RESULT_SUCCESS
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}
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}
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}
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