iButton Converter

iButton Converter is a Flipper Zero application designed for converting iButton key dumps from Metakom or Cyfral formats into the Dallas format. The application supports multiple conversion modes for each format, including well-known and lesser-known encoding schemes.

Features

• Support for importing Metakom and Cyfral key dump files
• Multiple conversion modes:
• Metakom:
  • Direct mode
  • Reversed mode
• Cyfral:
  • Standard modes: C1, C2, C3, C4
  • Extended modes: C5, C6, C7
• Output to Dallas iButton format
• Custom naming for the converted output file

Usage

1. Launch the iButton Converter application on your Flipper Zero.
2. Select a key dump file in either Metakom or Cyfral format.
3. Choose the desired conversion mode:
4. For Metakom: direct or reversed
5. For Cyfral: one of C1–C7
6. Enter the desired filename for the converted key.
7. Save the output in Dallas iButton format.

Acknowledgments

Conversion is based on documented and reverse-engineered encoding algorithms.

Special thanks to li0ard for implementing the Cyfral C5–C7 conversion modes and providing consultation on the remaining algorithmic details.

References

• Partial list of intercoms and suitable recodings
• Article about conversions from Cyfral to Dallas