pos_flutter_printer

A Flutter plugin to print structured receipts (with text, images, QR codes, font styles, alignment, and margins) on Bluetooth POS printers.

🚀 Features

• Print styled text with custom font, size, and alignment
• Print base64 images with align and width options
• Print QR codes with alignment and size
• Margin control (top and bottom)
• Supports Android Bluetooth POS printers
• Fully customizable via Flutter JSON-based structure

📦 Installation

Add this plugin in your pubspec.yaml:

dependencies:
  pos_flutter_printer: ^1.0.0

🛠 Usage

1. Import the plugin

import 'package:pos_flutter_printer/pos_flutter_printer.dart';

2. Use it in your code

final lines = [
  {
    "text": "THANK YOU",
    "align": "center",
    "size": 4,
    "font": "Roboto-Regular.ttf",
    "bold": true
  },
  {
    "text": "Pawan Kumar",
    "align": "center",
    "bold": false,
    "size": 3,
    "font": "Roboto-Regular.ttf",
  },
  {
    "image": "BASE64_IMAGE_STRING",
    "width": 250,
    "align": "center"
  },
  {
    "qr": "https://4brains.in",
    "width": 200,
    "align": "center"
  }
];

final result = await PosFlutterPrinter.printReceipt(
  lines: lines,
  topMargin: 30,
  bottomMargin: 60,
);

print("Result: \$result");

Fonts

Place your font file (e.g. Roboto-Regular.ttf) in:

android/src/main/assets/fonts/

Manifest Permissions

In your plugin's AndroidManifest.xml:

<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />

🧩 Parameters for Each Line

📋 License

MIT License. Created by 4Brains Technologies.