Print image using ESC command is not working

Question

import 'package:flutter_bluetooth_printer/flutter_bluetooth_printer_library.dart';
import 'package:esc_pos_utils_plus/esc_pos_utils_plus.dart';

I am using this two packages for printing image and I can't get it done. Printer just prints two empty lines and finishes. I saw you gave example for other question where you showed how to use flutter_simple_bluetooth_printer package. Is there somekind of example for printing images?
 

  final img.Image imgImage = img.decodeImage(imgBytes)!;

    bytes += generator.image(imgImage, align: escpos.PosAlign.left);

    var data = Uint8List.fromList([

      ...bytes,

      ...reset,

    ]);

    await FlutterBluetoothPrinter.printBytes(

      address: printerAddress,

      data: data,

      keepConnected: false,

    );

Answer 1

Hello, regarding this Bluetooth printing ESC/POS command, what is the command that you call to print pictures? What is the firmware version of the equipment you tested? I want to check whether there is any corresponding update. Thank you.

Comments

Thanks for reply,

I am using mentioned package (esc_pos_utils_plus) and this is source code of function (https://raw.githubusercontent.com/kechankrisna/esc_pos_utils_plus/refs/heads/nullable/lib/src/generator.dart#:~:text=///%20Print%20an%20image,50%5D%3B%0A%20%20%20%20return%20bytes%3B%0A%20%20%7D) that creates command.
firmware version: V1.3.2_20240315.090523

---

This M1K firmware version is too old,
please try to download this OTA to update and test this ESC/POS command.
1. The 1.ota package is placed in the device root directory (sdcard) and renamed as update.zip.
2. Send a broadcast to M1K to trigger OTA upgrade. Broadcasting code: com.telpo.syh.upgradeservice.broadcast.
OTA package download link：
https://drive.google.com/file/d/1CLp1aGZosg7t0r5tUkW6QeHoDZGcQjrN/view?usp=drive_link