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This is really cool. Usually when I build an arduino-based project that I want to be definitive, I use a standalone ATMEGA328p. And sometimes I regret that I can't update the code to add some functionality in my projects. What I did until now is that I left reachable wires that I use to reprogram the chip, but I still need to disassemble the project a little bit in order to reach the wires.With this, I could put a bluetooth reciever inside the project, seal if off completely, and still be able to reprogram the chip :D for 4€ it's completely worth it !
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