I have some data that I am sending over a GPRS connection to a server. Data integrity is very important so I am looking to find out what people are typically using as a checksum in Arduino? I found an MD5 library but even the basic example sketch is 14KB. I am using an UNO so that is just to large for me to use. Any suggestions on how to verify data integrity is appreciated.
CRC is probably a lot smaller.
How's this CRC solution?? http://excamera.com/sphinx/article-crc.html
Do you need error correction, or will you re-send?