Lesen von EnOcean Telegrammen via "elemt14 EnOcean Pi 868" Modul
//Compile: clear; rm -frv enocean_telegrams; g++ -g -fPIC -Wall enocean_telegrams.cpp -o enocean_telegrams; date;
//Forked from: https://github.com/hfunke/EnOceanSpy/blob/master/EnOceanSpy.c
//Info: https://www.cmrr.umn.edu/~strupp/serial.html // https://blog.mbedded.ninja/programming/operating-systems/linux/linux-serial-ports-using-c-cpp/
//manuel lesen:
//stty -F /dev/ttyAMA0 57600
//hexdump -C < /dev/ttyAMA0