I found two programs on Atmel Studio for following a line. One of them use PID. I think that PID is a more accurate method to follow lines, but do you have any suggestions on which program to use? Thanks
In general, I a PID method should be more accurate than some simpler method of line following, if tuned properly. Are you referring to the 3pi example programs? If so, I suggest reading through the “Example Project #1: Line Following” section of the 3pi user’s guide, which walks through the different examples and the advantages of the more advanced PID method.