Not able to read data from serial port after initializing it with dynamic path and baud rate.

[sinister296]

I am working on an app using Electron along with typescript and react.
I am using the SerialPort library in the main process of the app (the electron end, although my issue can be generalized though out.)

So, I am trying to pass the path and baud rate to the "new SerialPort({options})" from the front end and then initialize it. I have managed to achieve it by using typescript and creating a class for the serial port. Now the problem is with using the SerialPort.on('data') event. As I am not able to declare it independently inside the class.

Here's the code for creating the class:

---

export class SerialCommunication {
private port: SerialPort

public async loadPorts(outChannel?: IpcMainEvent) {
    const ports = await SerialPort.list();
    console.log('ports', ports);

    if (outChannel) {
        outChannel.reply('serial-ports', JSON.stringify(ports.map((x) => x.path)));
    }
}

public **open**(portData: IPortData, event: any) {
    
    console.log(portData);
    
    this.port = new SerialPort({
        path: portData.portName,
        baudRate: portData.baudRate,
        autoOpen: false
    }, (err) => {
        if (err) {
            console.log('SerialPort.open error', err);
        }
    });

    this.port.on('open', () => {
        console.log('Port Opened')
        console.log(this.port); 
    })

    const parser = new ReadlineParser()
    this.port.pipe(parser)
    parser.on('data', (line: string) => {
        console.log(line);
    });
}

public async **close** (): Promise<void> {
    console.log(this.port);
    console.log(this.port.isOpen);
    
    
    if (this.port && this.port.isOpen) {
        return new Promise((resolve, reject) => {
            this.port.close((err) => {
                if (err) {
                    reject(err);
                } else {
                    resolve();
                }
            });
        });
    }
}

}

Now, I'm trying to figure out a viable method to read the data incoming from the port. Since the parser.on('data') listener on works once immediately after the open function is called on the class from the other file.