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I've never used a memory card before. I've seen the code though. It's not a small thing to include, in terms of software, from what I've seen. It would be very nice though.
I don't have any handshaking or who knows what with the rs-232 serial. Would there be anything special involved in adding one of those bluetooth interfaces? Or is it just as simple as connecting the ground, tx, and rx to the input of the bluetooth, and then the phone or whatever magically receives the data? So, is this all you do?
cell phone --- $5 bluetooth thing --- rx, tx, ground on control board.
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