Bi-Directional Android Beam

Question

Here\'s what I\'m trying to do with 2 Galaxy Nexuses running Android 4.0 with NFC capabilities:

• Device A and B are in close enough to initiate an Android Beam

Answer 1

For now, (unfortunately) peer-to-peer mode is only accessible on Android through Android Beam, which can't be used for bi-directional communication. If you want to archieve true bi-directional communication, you can better use reader/writer & card-emulation modes. When emulate a ISO/IEC 14443-4 tag, you can use APDU commands (see ISO/IEC 7816-4) to send bi-directional information.