your link has lot of info (more to confuse me), I found a lot of info and ways to do CRC, Witch is correct?
CRC-16 0xBB3D
CRC-16 (Sick) 0x56A6
CRC-CCITT (0x0000) 0x31C3
CRC-CCITT (0xFFFF) 0x29B1
CRC-CCITT (0x1D0F) 0xE5CC
CRC-DNP 0x82EA
CRC-32 0xCBF43926
these are CRC results from the SAME string "123456789" look at:
http://www.lammertbies.nl/comm/info/...lculation.html