How to emulate a nfc-tag on an android phone

Question

I have an android phone (nexus s, sdk v15) which shall send a string to a development board running in nfc-reader/writer-mode by using tag-emulation. I know this is not official

Answer 1

Host card emulation is now officially supported by Android, according to http://developer.android.com/guide/topics/connectivity/nfc/hce.html