![]() ![]() The app will need to communicate with the Smart Card using APDU commands using T1 protocol in order to sign the invoice using a stored certificate on the smart card. I have seen another thread that uses the headphone jack to read a Square Card Reader but I am looking at a Bluetooth unit from Advanced Card Systems that has Android and IOS compatibility due to the mechanical issues associated with mounting a device directly to a phone or tablet using a headphone jack or USB connection. Currently there is a Free alternative that communicates with a central server over the internet to do this, but without a reliable internet connection the shop will be non-compliant and face either very expensive alternate solutions or fines. This is to be a very low cost solution for village shops where internet connections are less reliable so it will be a standalone device to "fiscalize" invoices for Tax office compliance. I have an opportunity to build an app for the Samoan tax authority that is a standalone Simple POS/Register but it needs to interface with a Smart Card reader. ![]()
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