Good evening!
I'm trying to setup a barcode scanner app using the Node SerialPort package, used on a Raspberry Pi 4, and I'm having a hard time getting the code to either recognise the device
I've identified that the path is /dev/hidraw0 as this is what I was able to ascertain from a dmesg output.
When I run cat /dev/hidraw0 it opens and when I scan a barcode it outputs %""'#''!'&" to the console (I know it's gibberish, but different problem for a different day). BUT, when I reference this path in my nodeJS code, I get the below error:
Serial port error: Error: Error: Invalid argument setting custom baud rate of 9600
I've confirmed on the manufacturer website that the default baud rate is 9600. I have tried removing the baudRate option in the below code, but it still says the same error.
This is the code I'm using right now:
// Use the serialport module to get scanner data
const SerialPort = require('serialport');
const Readline = require('@serialport/parser-readline')
// Open the serial port with some configuration
const port = new SerialPort('/dev/hidraw0', {baudRate: 9600});
const parser = new Readline()
port.pipe(parser)
// When the port is open just say so
port.on('open', function() {
console.log('Serial port open');
});
// Check for errors on the serial interface
port.on('error', function(err) {
console.log(`Serial port error: ${err}`);
});
// Pass scanner data onto web server
port.on('data', function(data) {
console.log('Scan prompted');
});
The USB Scanner I'm using is the Zebra LS2208 and I would love some help or guidance on what may be causing this.
Thanks in advance!
In case anyone else comes around this, I was not able to get the device working with the NPM package I referenced, but as this module used node-hid, I decided to use that one and was able to get my scanner recognised and working properly.