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I’m looking for a way to write my own app that can support credit card payment but using the credit card readers such as Blue Bamboo P25-M or MagTek iDynamo.
I’m pretty sure there’s a way to do this, but I don’t know what to do.
Do you think I need to contact those companies who make the reader?
Both devices appear to be “Made for iPod” and “Works with iPhone” – but there will a protocol name for which they are registered and an actual communications protocol that they will use for talking with iDevice. While you could probably discover the protocol name from one of the apps already written for these devices, reverse engineering the comms protocol would be daunting.
So, yes, I think that you would do best to contact these companies.