I'm working with a group that is equipping an RC airplane to fly autonomously. It is our first attempt, so there are a few things we do not have a good concept of yet.
At the moment, we are focusing on integrating our GPS component and enabling communication with our microcontroller. We have found some good pieces of code to read the NMEA sentences, but we do not understand Checksum.
Why is checksum necessary, and what is the checksum number (i.e. "*28") telling us? Any other advice on getting started with NMEA 0183 would also be appreciated