@tekka Thanks - works

@tekka sdсс not support __attribute ((packed)). Or do you use a different compiler?

sdcc --model-large --std-sdcc99 -Iinclude -I../SDK/_target_sdcc_nrf24le1_32/include -I../SDK/include -I./aes/include -c src/main.c -o "obj/"
include/MyMessage.h:308: syntax error: token -> '(' ; column 18
make: *** [obj/main.rel] Ошибка 1
(attribute((packed));)
and
sdcc --model-large --std-sdcc99 -Iinclude -I../SDK/_target_sdcc_nrf24le1_32/include -I../SDK/include -I./aes/include -c src/main.c -o "obj/"
src/main.c:74: syntax error: token -> 'outMsg' ; column 16
make: *** [obj/main.rel] Ошибка 1

@tekkaYou can follow any responses to publish libraries (MyMessage.h MyMessage.cpp, ...) adapt to the SDCC compiler?