const serialport = require("serialport");
const readline = require("@serialport/parser-readline");

const port = new serialport("COM3", {
    baudRate: 115200,
    autoOpen: true,
    lock: false,
});
const parser = port.pipe(new readline({delimiter: '\n'}));

parser.on('data', function(line) {
    console.log("Received: " + line);
});