I had an interesting answer to one similar question here: http://www.experts-exchange.com/questions/28711837/sending-data-from-web-app-to-till.html#a40966808
Now I can be more specific. Supposing the cash register is usb connected a computer which acts as server, how can I make the cash register receive the total amount of the orders of a customer? What is the logic?
My idea is to deploy a web app which will be used from clients to place orders. To print orders I can place a litener in the server to print them when they are inserted in the database, but how manage the cash recorder interface? Don't need (for the moment) to manage the transaction: just need to send the total to the till.
Iread that I'd need some php function to interface to Windows and execute DOS ESC Code Sequences, but I have no idea about what this means...
Thank you in advance.