42 lines
1.3 KiB
JavaScript
42 lines
1.3 KiB
JavaScript
'use strict'
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import bleno from '@abandonware/bleno'
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import log from 'loglevel'
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export default class StaticNotifyCharacteristic extends bleno.Characteristic {
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constructor (uuid, description, value, addRead = false) {
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super({
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uuid,
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properties: addRead ? ['read', 'notify'] : ['notify'],
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value: null,
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descriptors: [
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new bleno.Descriptor({
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uuid: '2901',
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value: description
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})
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]
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})
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this._uuid = uuid
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this._description = description
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this._value = Buffer.isBuffer(value) ? value : Buffer.from(value)
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this._updateValueCallback = null
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}
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onReadRequest (offset, callback) {
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log.debug(`ValueReadRequest: ${this._description ? this._description : this._uuid}`)
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callback(this.RESULT_SUCCESS, this._value.slice(offset, this._value.length))
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}
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onSubscribe (maxValueSize, updateValueCallback) {
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log.debug(`characteristic ${this._description ? this._description : this._uuid} - 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(`characteristic ${this._description ? this._description : this._uuid} - 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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}
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