@br8kppooint/visca/dist/visca/visca-serial.js

Advanced nodejs library for working with VISCA-based PTZ cameras over IP and over serial connections.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.SerialTransport = void 0;
// import {SerialPort} from "serialport"
const events_1 = require("events");
const uuid_1 = require("uuid");
// import SerialPort = require("serialport")
const serialport_1 = require("serialport");
const command_1 = require("./command");
const { DelimiterParser } = require('@serialport/parser-delimiter');
// simply implements a visca transport over the serial interface
class SerialTransport extends events_1.EventEmitter {
    constructor(portname = "/dev/ttyUSB0", timeout = 1, baudRate = 9600, debug = false) {
        super();
        this.portname = portname;
        this.timeout = timeout;
        this.baudRate = baudRate;
        this.debug = debug;
        this.started = false;
        if (this.started)
            return;
        this.uuid = uuid_1.v4();
        this.start();
    }
    start() {
        if (this.started)
            return;
        // open the serial port
        try {
            this.serialport = new serialport_1.SerialPort({ path: this.portname, baudRate: this.baudRate });
            this.serialport.on('open', this.onOpen.bind(this)); // provides error object
            this.serialport.on('close', this.onClose.bind(this)); // if disconnected, err.disconnected == true
            this.serialport.on('error', this.onError.bind(this)); // provides error object
            this.serialport.on('data', this.onData.bind(this));
            const parser = this.serialport.pipe(new DelimiterParser({ delimiter: [0xff] }));
            parser.on('data', this.onData.bind(this)); // provides a Buffer object
            /*this.serialport.open((err)=>{
                if(err){S
                    console.log("################### Error opening serial port "+ this.portname +":");
                    console.log(err);
                }else{
                    console.log("################### " + this.portname +" successfully opened!!");
                }
                
                
            })*/
        }
        catch (e) {
            console.log(`Exception opening serial port '${this.portname}' for (display) ${e}\n`);
        }
    }
    restart() { this.close(); this.start(); }
    close() { this.serialport.close(); this.started = false; }
    onOpen() { this.started = true; this.emit('open'); console.log("####### " + this.portname + " SERIALPORT OPENED!!!!"); }
    onClose(e) { console.log(e); this.started = false; this.emit('close'); }
    onError(e) {
        console.log(e);
        this.started = false;
        this.emit('error', e);
    }
    onData(packet) {
        // the socket parser gives us only full visca packets
        // (terminated with 0xff)
        console.log('Received: ', packet);
        if (this.debug)
            console.log('Received: ' + packet);
        // convert to command packet object
        let v = command_1.ViscaCommand.fromPacket([...packet]);
        this.emit('data', v);
    }
    write(viscaCommand) {
        if (!this.serialport.isOpen)
            return;
        let packet = viscaCommand.toPacket();
        this.serialport.write(packet);
        if (this.debug)
            console.log('Sent: ' + packet);
    }
}
exports.SerialTransport = SerialTransport;
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