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A project log for Retevis RT40 Reverse Engineering & Extension

The Retevis RT40 is a licence-free digital two-way handheld radio with lots of unused potential!

0xCAFEAFFE0xCAFEAFFE 03/25/2019 at 20:000 Comments

It took me long to understand how the channel frequency settings are stored in flash but now I do and I was able to write my own command line tool to read device flash data! By reading the complete content, I found:

a) Flash content wraps at 0x2000
b) Unknown content starting at 0x1A00, that is neither read nor written by the official app. Possibly relicts from developement?

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