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Thanks. I picked up a mega 2560 today as I couldn't find the relevant flags to get it to compile on any of my other boards. The goal for me is to use a pro mini -- see photog with current hardware, still more miniaturization to come. I was using a Pi 0, but the graphics were jerky -- I might still do something based on the Pi0 but the car interface board/shield will need to be redone for that form factor.
Parallax LCD using a single pin is very attractive for portability -- does that mean the tx pin cannot be used for json output to the Pi? Or is it as straightforward as dedicating another pin for output?
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