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A project log for Retevis RT40 Reverse Engineering

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

0xcafeaffe0xCAFEAFFE 03/26/2019 at 13:181 Comment

ROFL! Now that I actually reverse engineered the cable, the serial data transmission format, the config flash and after writing my custom flash tool, I discovered that it actually IS possible to just export the config file from the official app, edit it manually and load it back to achieve the same results! Lot's of time wasted but nevermind, who knows how the additional effort in understanding this will pay off in the future!

Discussions

Hulan wrote 10/18/2019 at 17:41 point

Can you  change the Power from Low to High by changing in the config file? When opening the altered .dat file again in the official app (RT40 PMR V1.0113) for me it reverts the entry back to Low. 

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