Comment on Show HN: Program Microcontrollers from Your Headphone jackparentComments−binarymax11yI always assumed, based on my tiny amount of knowledge of the Square credit card reader, that this was possible on iOS?https://squareup.com/reader−lgeek11yI think it's using the analog audio hardware, similarly to this project.
Comments
I always assumed, based on my tiny amount of knowledge of the Square credit card reader, that this was possible on iOS?
https://squareup.com/reader
I think it's using the analog audio hardware, similarly to this project.