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I worked on an embedded project that changes the modules of different functions, but the program code for the Mega Rduino is too big to integrate all functions of the modules and to rewrite it, I researched it and tested that it is possible to start the file . Hex from Sd, so I wondered if I can configure the bootloader to determine what module the system is using so that it can switch between files. Hex stored in SD. Someone has done something similar?