Print via serial port (Web) - How to troubleshoot

[heyfromapp]

Hello,

I am trying to use to connect website for receipt printing. Request prompt is coming to select available port for the printer but nothing is happening after connect.

I can see that data array being passed to Writer instance in debugging mode. Any help to how to get this working.

My code is executing this in a callback function on click event.

const data = await render(
  <Printer type="epson">
    <Text>Hello World</Text>
  </Printer>
);

const port = await window.navigator.serial.requestPort();
await port.open({ baudRate: 9600 });

const writer = port.writable?.getWriter();
if (writer != null) {
  await writer.write(data);
  writer.releaseLock();
}

Thanks,

GJ

[Hassan-jr]

The same happened to me while using POS80 printer. I had to check if the printer accepts esc/POS commands which it does support.
Still debugging this, Incase you solve this @heyfromapp share it.

[X4M1T0]

Did you solve the error? I can´t make my script find my serial port to print my items!