MicroPython is a firmware environment for quickly developing and deploying software onto microcontroller systems. It is used in a variety of industrial and scientific applications, as well as (most importantly) in some DEF CON #badgelife projects. It's easy to learn and use for rapid prototyping. For hackers interested in reverse engineering compiled or obfuscated MicroPython code, there are some obstacles. MicroPython is an implementation of CPython, not a port, so it has its own compiled bytecode language that existing reverse engineering tools aren't designed to parse. Also, modules can be "frozen", compiled directly into the microcontroller firmware, and may be difficult to locate and parse when microcontroller firmware is extracted and analyzed. In this talk, Wesley will walk the audience through the process of identifying "frozen"/compiled modules in a firmware image without debug symbols using the Ghidra disassembler.