We need a electronic board and software for Arduino, to get in touch Coin and bill acceptor , thought serial protocol to know which bill or coin is getting into the machine.
We need to hear the coin and bill validator using RS232 virtual port to put in the screen the value. Actually we are using MDB4.2
8 freelancers are bidding on average $348 for this job
I learn fast by every project I face, all about investigation and implementation until now, also I've implemented code for vending machines before as a student