Description:

The Bluetooth Printer Plugin is a versatile solution for integrating Bluetooth printing functionality into Android and iOS applications. It enables seamless communication with Bluetooth-enabled printers, allowing users to print text, images, QR codes, and other content directly from their mobile devices. This plugin simplifies the process of setting up and utilizing Bluetooth printers for various use cases, such as retail, logistics, and hospitality.

Features:

1. Cross-Platform Support:
   • Compatible with both Android and iOS platforms for broad accessibility.
2. Text Printing:
   • Print styled text with adjustable size, style (e.g., bold), and alignment (e.g., left, center, right).
   • Support for left-right aligned text for creating receipts or reports.
3. Image Printing:
   • Print images such as logos or graphics using Base64 encoding.
4. Custom Line Spacing:
   • Add new lines or dashed lines to enhance printed layouts.
5. QR Code Printing:
   • Generate and print QR codes for enhanced interactivity and usability.

Use Cases:

• Retail and Hospitality:
  • Print receipts, order summaries, or invoices directly from mobile apps.
• Logistics and Transportation:
  • Generate shipping labels or tracking information on the go.
• Event Management:
  • Print tickets, badges, or QR codes for quick scanning and entry.

Instructions:

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

Reference and dependencies create this plugin

• blue_thermal_printer
• esc_pos_utils
• esc_pos_utils_plus
• flutter_blue
• image
• qr_flutter
• webcontent_converter