88 lines
1.9 KiB
JavaScript
88 lines
1.9 KiB
JavaScript
const bleno = require('bleno')
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const config = require('./config.json')
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const escpos = require('escpos')
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const device = new escpos.Serial(config.printer.serial)
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const printer = new escpos.Printer(device)
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let isOpen = false
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device.open(()=>{
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isOpen = true
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})
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var tmp = []
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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.uuid.service.func.data,
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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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console.log(data[0])
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} else if (data.length == 1 && data[0] == 0xff) {
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//console.log(tmp)
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console.log(Buffer.from(tmp).toString())
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printString(Buffer.from(tmp).toString())
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if(this._notifyFunc) {
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this._notifyFunc(Buffer.from([0x00,0x01]))
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}
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} else {
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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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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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function printString(str){
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if(!isOpen) return
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let strs = str.split(/\n/)
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printer.font('a')
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.align('ct')
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.size(1,1)
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for(let i in strs){
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printer.text(strs[i])
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}
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printer.cut(true, 8)
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}
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process.on('SIGINT', async ()=>{
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await new Promise((resolve, reject) => {
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device.close(()=>{
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console.log('serial device close')
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resolve(null)
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})
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})
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process.exit(0)
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})
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module.exports = DataCharacteristic
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