A small Windows GUI for reading and writing the EEPROM of RTL-SDR (RTL2832U) dongles - in particular the USB serial number, manufacturer and product strings.

It is a friendly front end for the same on-dongle configuration that the osmocom rtl_eeprom tool edits, with the string-descriptor parsing/generation logic ported from rtl_eeprom.c.

• Lists all connected RTL-SDR devices (index, vendor/product, current serial).
• Reads and displays the current EEPROM configuration.
• Edits manufacturer, product and serial number, plus the serial-enabled, IR-endpoint and remote-wakeup flags.
• Backup and full restore of the 256-byte EEPROM image.

Writing the EEPROM is deliberately conservative so a dongle is hard to brick:

• The full 256-byte EEPROM is read first; only the 128-byte configuration area is written for normal edits.
• The configuration is regenerated from the existing EEPROM, so untouched fields, vendor/product IDs and unknown OEM bytes are preserved.
• rtlsdr_write_eeprom() only programs bytes that actually differ, and a no-edit write is a true zero-byte no-op.
• A backup is written to backups/ before every write, and every write is verified by reading the EEPROM back.
• Input is sanitised: the serial accepts digits 0-9 only, while manufacturer and product accept letters, digits, space and - _ . +. Values that do not fit the descriptor area disable the Write button.

Use at your own risk. Unplug/replug the dongle after a successful write for the new descriptors to take effect.

Requires a 64-bit MinGW-w64 toolchain (MSYS2 is easiest) plus CMake and Ninja. The librtlsdr headers, import libraries and runtime DLLs are vendored under third_party/rtlsdr, so no extra SDK is needed.

From a shell with C:\msys64\mingw64\bin on PATH:

cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release
cmake --build build

The executable is produced at build/RTLSerializer.exe, with rtlsdr.dll and libusb-1.0.dll copied next to it automatically.

src/main.cpp      Win32 GUI
src/eeprom.*      EEPROM string-descriptor parsing / generation
src/app.rc        Manifest resource
third_party/rtlsdr  Vendored librtlsdr SDK (GPLv2)

• Reference implementation: osmocom rtl-sdr (rtl_eeprom.c, librtlsdr).
• third_party/rtlsdr is the GPLv2 librtlsdr library and its public header.