3 ms·

Using the audio jack like Square. Isn't there a way yet to use digital like USB yet.

• robin_reala 12y ago
  Or alternatively Bluetooth. iZettle’s approach is a selfcontained chip+PIN device that communicates with the app on your smartphone wirelessly. The app then handles 3G connection. https://www.izettle.com/gb/card-readers https://www.izettle.com/gb/card-readers
  • ape4 12y ago
    Of course, Bluetooth. It could still plug into the iPhone audio jack for stability.
    • robin_reala 12y ago
      I’ve used these devices before. Merchant facing functionality (e.g. entering prices) is on the phone side, customer facing functionality on the box. The customer never needs to touch the phone.
• icebraining 12y ago
  Using the audio jack allows them to make a very dumb, very cheap reader. All you need is a magnetic head (like those in cassette decks) and a maybe a couple of basic components. See the disassembly of the Square reader: http://cosmodro.me/blog/2011/mar/25/rhombus-square-iskewedi/ http://cosmodro.me/blog/2011/mar/25/rhombus-square-iskewedi/
  • deleted 12y ago
    [deleted]