I am having a weird issue with the Mega 2560 Arduino (two separate versions of it, from two separate manufacturers) that I am not having with an Uno. I am trying to send a serial message to the board and then have it respond, but if I try to do the send-receive loop too quickly then I start just rea…

Communication lag using Arduino Mega 2560

system February 14, 2013, 8:15pm 6

That b? That stands for beta.

Try version 1.5.1 (the last production version).