i would like to make two arduino send data to each other with quick setup, i was thinking os using RFID reader/writer to send data with a touch.
eventually what i want to do is to have a program where i can send data to any another arduino without seting up. So for example i pair the two arduino only with a single touch .... something similar to android beam where you can send data to two different android phones with one touch.
any suggestions of what i need to use ? which technology (NFC, bluetooth, WIFI direct .... etc ) as am stuck for now .