I have not found much on the use of XOR on the forums, so I decided to make a short demo sketch with an explanation of how it works with checksums.
The history is, that about 15 years ago I wrote some programs to receive serial data from GPS and AIS receivers for use with an old Mac Book Pro on my sailing boat.
I thought it was going to be complex, how wrong I was.
So I have uploaded a simple guide to how XOR checksums work to my Github website, for anyone who is interested.
Check it out at https://github.com/The-Black-Pig/XOR_checksum
All comments welcome!