45 lines
1.3 KiB
JavaScript
45 lines
1.3 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 ControlTransmit Characteristic as defined in:
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https://www.concept2.co.uk/files/pdf/us/monitors/PM5_BluetoothSmartInterfaceDefinition.pdf
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Used to transmit controls to the central
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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 ControlTransmit extends bleno.Characteristic {
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constructor () {
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super({
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// id for ControlTransmit as defined in the spec
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uuid: getFullUUID('0022'),
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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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}
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onSubscribe (maxValueSize, updateValueCallback) {
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log.debug(`ControlTransmit - 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('ControlTransmit - 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) {
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const bufferBuilder = new BufferBuilder()
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this._updateValueCallback(bufferBuilder.getBuffer())
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return this.RESULT_SUCCESS
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}
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}
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}
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