Ok here is my problem: I'm making a product where I need to plug as a receipt printer and then I need to compute some data, read an NFC tag and send the data to a web server each time a receipt is send to the device.
I searched online about what device use as a base for my prototype phase (100 units maximum), because (1) due to time a custom PCB with custom spec is out of question, and (2) the Pi family is my best bet except I can't expect 100 Zero (which would be perfect).
So my question is in the Pi family which device could, with some hack, be a custom USB client who I could read data directly and do my little kitchen after?
From what I read elsewhere: Raspberry A could but nobody has a proof, GPIO on B+/2 could be done with some software hack (C++ should have a lib about that).
Other idea would be to use an Arduino chip, write it and solder it on a protoboard to interpret an USB Client and send data over SPI or UART.
I'm a software guy and before big production, we will see with someone for custom specs but not before we confirm the idea in a test phase.
Arduino: not enough horse power, CHIP: Awesome but not enough production (I asked), BeagleBone Black and Edison too expensive.
P.S. I'm not a native english speaker, so please excuse any errors. I would gladly correct them.