Image command not working in printer

[ajayvraikar]

I generated zpl image command using this library.
But its working in Zpl previewer
But in actual printer it's not working.
Please look into this.

[jesusbmx]

I generated zpl image command using this library. But its working in Zpl previewer But in actual printer it's not working. Please look into this.

Hello, how are you? At the moment, the library only generates ZPL code. I am planning to implement the print function. You can use another library like react-native-tcp-socket

import TcpSocket from 'react-native-tcp-socket';
import { Zpl } from "react-native-zpl-code";

// Create socket
const options = {
  port: 9100,
  host: '192.168.0.1', // printer
  reuseAddress: true,
};

const client = TcpSocket.createConnection(options, async () => {
  // Create a ZPL builder instance
  const zplBuilder = new Zpl.Builder();
  ...
  // Generate ZPL code
  const zplCode = await zplBuilder.build();

  // Write on the socket
  client.write(zplCode);

  // Close socket
  client.destroy();
});

[roniemartinez]

Same issue here.

The generated ZPL for an image is not getting printed. But text does print properly so it is highly likely to be image-to-ZPL-related issue.

I am using bluetooth to print. The printer indicator shows there is a "transfer" but nothing is getting printed.

[roniemartinez]

@jesusbmx

I've managed to figure out what is wrong with the image not printing on the actual hardware. The CRC used here for ZB64 compression and by most of the existing libraries is incorrect. We opted to using another library since we are printing from PDF. If the same features have been in a react-native library, we would love to move back.

Here is the related bug report: miikanissi/zebrafy#17
And here is the fix I submitted: miikanissi/zebrafy#18

All the reference documentations are in miikanissi/zebrafy#17 (comment)