Blaupunkt BNO881 FIS1 Radio Code Calculator – Full Source Code

Blaupunkt BNO881 FIS1 Radio Code Calculator – Full Python Source Code

Add BNO881 / FIS1 radio PIN recovery to your automotive repair or diagnostic workflow. This complete Python source package includes an offline desktop calculator, command-line tools and a documented integration API for compatible Blaupunkt BNO881 FIS1 / Type 1 data.

Designed for automotive electronics developers, EEPROM programmers, radio repair specialists and workshops, the application decodes compatible 24C32 EEPROM dumps or manually entered FIS1 HEX data and displays all matching four-digit PIN candidates.

Full source code included. Local calculations. No online PIN database or software activation required.

Key Features

• EEPROM dump decoding: read compatible 4096-byte 24C32 binary dumps and extract FIS1 data.
• Automatic block detection: locate FIS1 copies at standard and relocated 16-byte-aligned offsets.
• Data integrity checks: validate repeated copies and zero padding; reject conflicting copies with clear errors.
• Manual HEX decoding: decode an eight-byte FIS1 value, with spaces, colons or hyphens accepted as separators.
• PIN-to-FIS1 encoding: generate FIS1 values for development and integration testing.
• All matching candidates: preserve leading zeroes and display multiple PIN matches when an encoding collision occurs.
• Desktop interface: dedicated EEPROM Dump, Manual FIS1 HEX and Encode PIN tabs.
• Offline processing: desktop calculations run locally without a network connection.
• Developer integration: documented Python API and command-line interface.
• Browser demo source: restricted manual HEX decoding, a synthetic EEPROM example and compatibility information.
• Validation resources: automated tests and synthetic sample data included.

Compatible Radio Families

Supports selected variants from the following families only when the individual unit uses Blaupunkt BNO881 and FIS1 / Type 1:

• Volkswagen: selected MCD, MFD and MFD2 / RNS2 variants.
• Audi: selected Navigation Plus variants.
• Škoda: selected Navigation variants.
• Seat: selected Dynamic Navigation variants.

Compatible-family examples include 1J0 035 191 A/B/C, 1K0 035 198 A/C/BX, selected 3B0 035 191, 7L6 035 191, 4B0 035 192 and 8E0 035 192 families, and 1U0 035 191 A/B. These are scope examples, not individual hardware-tested claims. Model names, part-number prefixes and EEPROM type alone do not establish compatibility.

How It Works

1. Open a compatible EEPROM dump or enter an eight-byte FIS1 HEX value.
2. For full dumps, the application checks the repeated FIS1 structures and their consistency.
3. View the encoded value, detected copy offsets and all matching PIN candidates.
4. Copy the result or integrate decoding into your own Python workflow through the supplied API.

What Is Included?

• Full Python source code for the codec, dump detector, desktop application, CLI and restricted browser demo.
• Documented integration API.
• Pinned dependency files and a Windows executable build script.
• Automated regression tests and a clearly marked synthetic demonstration dump.
• README, Quick Start, compatibility guide, API documentation and demo deployment instructions.
• Changelog, source packaging tool and third-party component notices.

This listing is for the source code package. The included build instructions allow you to create a standalone Windows executable that runs without Python installed.

Technical Requirements

• Source execution: Python 3.14 or newer with pip.
• Desktop interface: Tk support and CustomTkinter 6.0.0.
• Validated desktop target: Windows x64. Other platforms are not certified by this release.
• Executable build: PyInstaller 6.22.3.
• Optional browser demo: Waitress 3.0.2.
• Core codec and dump detector: Python standard library only.

Compatibility and Limitations

• Full-dump detection accepts exactly 4096 bytes and requires at least three agreeing, zero-padded FIS1 blocks on 16-byte boundaries, including three equally spaced copies.
• Explicit raw input supports eight-byte FIS1 values or sixteen-byte blocks with eight trailing zero bytes. Raw input does not receive full EEPROM integrity verification.
• The default decoder searches PINs from 0000 to 1999. The development encoder accepts 0000 to 9999.
• Some encoded values match multiple PINs. The original PIN cannot be determined from that encoded value alone.
• FIS2 / Type 2, FIS3 / Type 3, RCD300/310/500/510, RNS310/510 and VW Alpha/Beta/Gamma are not supported.
• Unrelated 25C160 / 25160 / 95320 / 95640 algorithms are not supported.
• Serial-number-based recovery, physical radio model identification and EEPROM programming are not included.
• The browser demo accepts manual HEX and a built-in synthetic example; arbitrary EEPROM file uploads are not included.

Version 1.0.0

Initial source release with BNO881 FIS1 decoding and encoding, conservative EEPROM validation, offline desktop UI, CLI/API integration, restricted browser demo, synthetic sample data and automated tests.

Intended for repair, recovery, development and servicing of equipment you own or are authorized to service.