74 lines
1.5 KiB
JavaScript
74 lines
1.5 KiB
JavaScript
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'use strict';
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const SerialPort = require('serialport');
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const parser = SerialPort.parsers.readline("\n");
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const delay = 15;
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const baud = 57600;
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let waiting = false;
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let waitCb;
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class arduinoCom {
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constructor () {
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this.port = {};
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this.path = '';
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SerialPort.list((err, ports) => {
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if (err) {
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return console.error(err);
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}
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for (let i = 0; i < ports.length; i++) {
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if ((ports[i].manufacturer + '').toLowerCase().indexOf('arduino') !== -1) {
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this.path = ports[i].comName;
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break;
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}
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}
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if (this.path === '') {
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return console.error('No arduino found');
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}
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console.log(`Connecting to ${this.path}...`);
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this.port = new SerialPort(this.path, {
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baudRate: baud,
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parser : parser,
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autoOpen: false
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});
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this.port.open((err) => {
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if (err) {
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return console.error(err);
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}
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console.log(`Connected to ${this.path} @ ${baud} baud`);
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this.port.on('data', this.dataCb);
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});
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});
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}
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dataCb (data = '{}') {
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data = JSON.parse(data);
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if (waiting) {
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waitCb(null, data);
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waiting = false;
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}
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}
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send (ch = 'z', callback = null, nowait = false) {
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if (!waiting && !nowait) {
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waitCb = callback;
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waiting = true;
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} else if (nowait) {
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waiting = false;
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if (callback !== null) {
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return callback(null, {});
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}
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} else {
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return callback('Port is currently in use');
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}
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setTimeout(() => {
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this.port.write(ch);
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}, delay);
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return false;
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}
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close (callback) {
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console.log('Closing ${this.path}');
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this.port.close(callback);
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}
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}
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module.exports = new arduinoCom();
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