72 lines
1.6 KiB
JavaScript
72 lines
1.6 KiB
JavaScript
const bleno = require('bleno')
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const config = require('../config.json')
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const localEvent = require('../localEvent')
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var tmp = []
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var idx = 0
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var failFlag = false
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const notifyDesciptor = new bleno.Descriptor({
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uuid: '8888',
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value: 0
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})
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class DataCharacteristic extends bleno.Characteristic {
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constructor () {
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super({
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uuid: config.ble.uuid.characteristic,
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properties: ['write', 'writeWithoutResponse', 'notify'],
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descriptors: [
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notifyDesciptor
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]
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})
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this._notifyFunc = null
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}
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onWriteRequest (data, offset, withoutResponse, callback) {
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console.log(`offset :: ${offset} , withoutRes :: ${withoutResponse}`)
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console.log(`get data`, data)
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if (data.length === 1 && data[0] === 0x00) {
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tmp = []
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idx = 0
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failFlag = false
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} else if (data.length === 1 && data[0] === 0xff) {
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console.log(Buffer.from(tmp).toString())
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if (!failFlag) {
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localEvent.emit('print', Buffer.from(tmp).toString())
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}
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} else if (!failFlag) {
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let pidx = ((data[0] & 0xff) << 8) + (data[1] & 0xff)
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if (idx !== pidx) {
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// insert fail method
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failFlag = true
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this.sendNotidy('fail')
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}
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idx++
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tmp = [...tmp, ...data.slice(2, data.length)]
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}
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if (!withoutResponse) {
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console.log('send response')
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callback(this.RESULT_SUCCESS)
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}
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}
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sendNotidy (str) {
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if (!this._notifyFunc) return
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this._notifyFunc(Buffer.from(str))
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}
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onSubscribe (maxValueSize, cb) {
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console.log(maxValueSize)
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this._notifyFunc = cb
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}
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onUnsubscribe () {
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this._notifyFunc = null
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}
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}
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module.exports = DataCharacteristic
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