I am trying to send NFC data from one Android device to another. I was able to do it successfully using the Andoid Beam functionality. But I would like the data transfer to take place automatically (bypassing Android Beam) as soon as both the devices are together.
If one of your device have Android KitKat (4.4), there's a new feature in this version: https://developer.android.com/guide/topics/connectivity/nfc/hce.html
You could put one device in reader mode (default mode) and one device in card mode (card emulation).