The device must receive 'instructions' from any 'point of sale' (POS).
The POS is basically a register that you can find in any store when you buy something.
The 'Instructions' are usually receipts generated by the POS system.
The device must be able to connect to any POS using any connector such as USB, etc.
The device must hold those instructions temporarily. Let's say for 30 seconds once they are sent to the device.
The device then transmits those instructions to the iOS app. For that, it must be able to connect with the iOS app wirelessly through NFC or bluetooth.
Added 2 months ago.
I could probably bolt something together relatively quickly. Economical will depend on quantity needed, of course. I can be reached by dropping a line to jricher at 0xbd8 dot com
Hey guys, just wanted to chime in here for future reference. There is also a private messaging feature on SnapEDA if you click on that person's profile and click Send Message. For now, I've connected you both via email. Cheers and best of luck on the project!
Answered 2 months ago.