OpenPrintTag (Dart)

Dart/Flutter library for encoding and decoding OpenPrintTag data on NFC tags. Based on the Python OpenPrintTag library.

Installation

dependencies:
  open_print_tag: ^0.1.0

Usage

import 'package:open_print_tag/open_print_tag.dart';

// Create parser
final parser = OpenPrintTagParser.create();

// Write data
final payload = OpenPrintTagPayload(
  data: OpenPrintTagData(
    main: OpenPrintTagMainData(
      materialClass: MaterialClassEnum.FFF,
      materialType: MaterialTypeEnum.PLA,
      materialName: 'My PLA',
      minPrintTemperature: 200,
      minBedTemperature: 60,
    ),
  ),
);

final encoded = parser.encode(payload, size: 320); // 320 bytes for NTAG213

// Read data
final decoded = await parser.decode(encoded);
print('Material: ${decoded.data.main?.materialName}');

Working with NDEF

The library handles OpenPrintTag CBOR encoding. You'll need an NDEF library to actually read/write NFC tags.

MIME type: application/vnd.openprinttag (available as OpenPrintTagConstants.mimeType)

Development

Updating Data Definitions

This library uses a Git submodule to track data definitions (field schemas, enums) from the upstream OpenPrintTag repository.

To update to the latest definitions:

make update-data

Links

• OpenPrintTag (Python) - Original implementation
• Specification - Format docs
• Repository

License

MIT