B4R Question BV20 (Bill Validator)

Chris Guanzon

Active Member
Licensed User
Does anyone here tried BV20 bill validator? I can't find any sample on how to make a simple program for b4r.


Licensed User
The serial interface and protocol are described at page 20 of the document:


Parallel interface is described on page 14, and is probably simpler to implement, but uses more pins (well, between 3 and 10 pins, depending on your requirements) and only accepts 4 note types.

There is a Arduino-BV20 serial interfacing conversation at:


which might be useful re: electronics of connecting Arduino to BV20. Don't be put off by the first paragraph... Joe eventually gets it going :)
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