68 lines
2.3 KiB
JavaScript
68 lines
2.3 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 AdditionalStrokeData as defined in:
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https://www.concept2.co.uk/files/pdf/us/monitors/PM5_BluetoothSmartInterfaceDefinition.pdf
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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 AdditionalStrokeData extends bleno.Characteristic {
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constructor (multiplexedCharacteristic) {
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super({
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// id for AdditionalStrokeData as defined in the spec
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uuid: getFullUUID('0036'),
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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(`AdditionalStrokeData - 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('AdditionalStrokeData - 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.durationTotal * 100))
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// strokePower: UInt16LE in watts
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bufferBuilder.writeUInt16LE(Math.round(data.power))
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// strokeCalories: UInt16LE in cal
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bufferBuilder.writeUInt16LE(0)
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// strokeCount: UInt16LE
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bufferBuilder.writeUInt16LE(Math.round(data.strokesTotal))
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// projectedWorkTime: UInt24LE in 1 sec
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bufferBuilder.writeUInt24LE(0)
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// projectedWorkDistance: UInt24LE in 1 m
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bufferBuilder.writeUInt24LE(0)
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if (!this._updateValueCallback) {
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// the multiplexer uses a slightly different format for the AdditionalStrokeData
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// it adds workPerStroke at the end
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// workPerStroke: UInt16LE
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bufferBuilder.writeUInt16LE(0)
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}
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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(0x36, 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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