I've been looking for a solution for a long time to prevent them from reading an edc15 by obd.
But that can be written.

I am with damos and Funktionsrahmen.

Can someone give me a hint.
Thank you

Haven't looked into EDC15 in particular, but in general you look up the flash read and write routines in program code section.

Figure out how they work and then decide how to alter the read routine without messing up writing.

You can either reuse an error code that tells the flasher to stop reading or make it return 0xFF for all the calibration data.

Keep in mind, that anyone who is capable of putting the C167 processor inside EDC15 into bootmode or even desolders it, will get your tune anyways.

# +1

Importend "devellopements" like recalibriting nozzels, running bigger turbos or VEP pumps are stolen 10 years ago and wander allover the net..

realy nothing "new" to protect
EDC is opensource more or less