79 lines
3.0 KiB
JavaScript
79 lines
3.0 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 AdditionalStatus 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 AdditionalStatus extends bleno.Characteristic {
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constructor (multiplexedCharacteristic) {
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super({
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// id for AdditionalStatus as defined in the spec
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uuid: getFullUUID('0032'),
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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(`AdditionalStatus - 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('AdditionalStatus - 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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// speed: UInt16LE in 0.001 m/sec
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bufferBuilder.writeUInt16LE(Math.round(data.speed * 1000 / 3.6))
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// strokeRate: UInt8 in strokes/min
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bufferBuilder.writeUInt8(Math.round(data.strokesPerMinute))
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// heartrate: UInt8 in bpm, 255 if invalid
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bufferBuilder.writeUInt8(Math.round(data.heartrate))
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// currentPace: UInt16LE in 0.01 sec/500m
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// if split is infinite (i.e. while pausing), use the highest possible number
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bufferBuilder.writeUInt16LE(data.split !== Infinity ? Math.round(data.split * 100) : 0xFFFF)
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// averagePace: UInt16LE in 0.01 sec/500m
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let averagePace = 0
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if (data.distanceTotal && data.distanceTotal !== 0) {
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averagePace = data.durationTotal / data.distanceTotal * 500
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}
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bufferBuilder.writeUInt16LE(Math.round(averagePace * 100))
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// restDistance: UInt16LE
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bufferBuilder.writeUInt16LE(0)
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// restTime: UInt24LE in 0.01 sec
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bufferBuilder.writeUInt24LE(0 * 100)
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if (!this._updateValueCallback) {
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// the multiplexer uses a slightly different format for the AdditionalStatus
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// it adds averagePower before the ergMachineType
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// averagePower: UInt16LE in watts
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bufferBuilder.writeUInt16LE(Math.round(data.power))
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}
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// ergMachineType: 0 TYPE_STATIC_D
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bufferBuilder.writeUInt8(0)
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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(0x32, 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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