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I want to try wire a barrel 2.5 mm connector to tx, rx and ground of a wp34s and then use crossover cable (casio calcs uses 2.5mm crossover cable for their calc communications, so I do not need to make a cable, i can use that one) to try to communicate with SENDP/RECV or the likes.

Will that approach work? Did somebody already try that?

Edit:
Found
Marcus' thread. I guess, this answers my question.

Edited: 28 July 2013, 10:32 p.m.

The communication commands in WP 34S are designed for direct communication. Good luck!