Originally, I was using pin 2 to test, but that was a couple days ago before I reached out for help here. In the latest failed attempt before moving to the Nano I was on Mega pin 6, so maybe that was the issue. I might try back on pin 2 or one of the others you mentioned.what pins were you using with the Mega?
Nano pins 5 and 6 are working great, but based on the link you sent, should I use pins 2 and 3 instead? I plan to use the Nano in the final build anyway, so I am happy with the progress so far.