blue_print_pos

Package Overview

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BluePrintPOS is a Flutter plugin that enables seamless connection to Bluetooth printer devices on both Android and iOS platforms. It provides a straightforward API for sending print commands, making it ideal for retail, point-of-sale (POS), and receipt printing applications. The plugin handles device discovery, pairing, and data transmission efficiently, ensuring reliable communication with compatible printers. With minimal setup, developers can integrate real-time printing functionality into their apps. It supports common printing operations such as text, barcode, and image output.

Use cases

Retail POS systems
Receipt printing
Inventory management
Event ticket printing
Mobile order processing

Key features

Bluetooth printer connectivity
Cross-platform support (Android & iOS)
Text and barcode printing
Simple API integration
Real-time print command execution

Suitable for

Developers building POS apps
Mobile retail solutions
Field service applications
On-the-go printing needs
Businesses requiring portable receipt printing

Considerations

Requires compatible Bluetooth printers
Limited to Android and iOS platforms
Printer-specific formatting may vary
Needs proper permissions for Bluetooth access
May require testing with specific hardware models

Original README

Original README snapshot from the linked source repository. Visit the repository for the latest content.

Introduction

This plugin to help use bluetooth printer in Android/iOS. Support for text, image, add new line or line dashed and QR.

Usage

Initialize

BluePrintPos bluePrintPos = BluePrintPos.instance;

Scan bluetooth printer

bluePrintPos.scan();

Connect bluetooth printer

bluePrintPos.connect(device);

Print Text

In method .addText(text, {size, style, alignment}) you can modify size, style and alignment

ReceiptSectionText receiptText = ReceiptSectionText();
receiptText.addText('MY STORE', size: ReceiptTextSizeType.medium, style: ReceiptTextStyleType.bold);

Print text left right

receiptText.addLeftRightText('Time', '04/06/21, 10:00');

Print image

final ByteData logoBytes = await rootBundle.load('assets/logo.jpg');
receiptText.addImage(
  base64.encode(Uint8List.view(logoBytes.buffer)),
  width: 150,
);

Add new line

receiptText.addSpacer();

Add new line with dash

receiptText.addSpacer(useDashed: true);

Getting Started

Android

Change the minSdkVersion in android/app/build.gradle in 19

android {
  defaultConfig {
     minSdkVersion 19
  }
}

Add permission for Bluetooth and access location in android/app/src/main/AndroidManifest.xml

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

iOS

Add info key in ios/Runner/Info.plist

<key>NSBluetoothAlwaysUsageDescription</key>  
<string>Need BLE permission</string>  
<key>NSBluetoothPeripheralUsageDescription</key>  
<string>Need BLE permission</string>  
<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>  
<string>Need Location permission</string>  
<key>NSLocationAlwaysUsageDescription</key>  
<string>Need Location permission</string>  
<key>NSLocationWhenInUseUsageDescription</key>  
<string>Need Location permission</string>

Thanks to

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