To get to the code, you first need a tool to extract the raw binary ( .bin ) or hexadecimal ( .hex ) data from the .uf2 file.

The above recovers raw binary. To actually (C-like pseudocode), integrate with:

The first step is stripping the UF2 headers to reconstruct a continuous raw binary (.bin) or hex file. Tools like uf2conv.py

With the environment configured, trigger the automated analysis engine in your reverse engineering tool. The software will scan the binary, identify function boundaries, and translate machine code instructions back into structured pseudo-C code.

You cannot "unbake" a cake back into eggs and flour perfectly. Similarly, a UF2 decompiler won't give you back your original C++ comments or variable names. It will, however, give you a functional representation of the logic. Top Tools for UF2 Decompilation and Analysis 1. uf2conv.py (The Swiss Army Knife)

Do you know which was used to build it? (e.g., Arduino, Pico SDK, CircuitPython)

Ghidra is a free, open-source software reverse engineering suite developed by the NSA. It features a powerful decompiler that converts machine code into a readable, C-like pseudocode.

This command removes the UF2 headers and extracts the executable payload, according to documentation on makerdiary/uf2utils. Step 3: Disassemble the Binary

The raw machine code or data destined for the microcontroller.

Compilers strip out variable names, function names, and comments. A function originally named read_temperature_sensor() might appear in your decompiler as FUN_0001a2b4() .

It is important to manage expectations. Decompilation is an incredibly difficult problem, and there are several significant hurdles: