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Where is he? So I can uprate him
EDIT: Also, why is that bottom part of that picture 'censored'?
Arduino based?
The best way to do this is to dpuplicate the good wires (tx and gnd I think), link them to an externale speaker, and put a switch between the wires and the speaker so you only get sound when wanted, and then don't get weird sounds because of some real data coming out of the TX ...