Communication with Point of sale terminal (POS)
Communication with Point of sale terminal (POS)
(OP)
I don't know how pos terminals work. But i need to use a pos terminal in a project. Basically the microcontroller based system will tell the pos terminal the amount to charge the credit card of the customer and the the pos terminal will return the information of payment received or not. Is this possible? Is current devices allows such communication with an outer device like a microcontroller over serial port etc? Thanks.





RE: Communication with Point of sale terminal (POS)
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Communication with Point of sale terminal (POS)
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Communication with Point of sale terminal (POS)
RE: Communication with Point of sale terminal (POS)
Many years ago, it used to be a simple RS232 link with a simple ASCII protocol with RTS/CTS handshaking. Could be that this is still used. Hook up a line sniffer and see what it looks like.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Communication with Point of sale terminal (POS)
RE: Communication with Point of sale terminal (POS)
I think I have given you some valuable information. RS232, ASCII, RTS/CTS handshaking. Perhaps not in all modern terminals. But, if you want information for a specific terminal - you have to tell us what terminal you are talking about, and what application.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Communication with Point of sale terminal (POS)
You need to understand the transaction itself (details can be obtained from the obvious sources) before trying to create a secondary terminal, as you may find all is not what it seems...
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Communication with Point of sale terminal (POS)
RE: Communication with Point of sale terminal (POS)
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
Chinese prisoner wins Nobel Peace Prize
RE: Communication with Point of sale terminal (POS)
RE: Communication with Point of sale terminal (POS)
Dan - Owner

http://www.Hi-TecDesigns.com