* Grove - XBee Carrier
** http://www.seeedstudio.com/wiki/Grove_-_XBee_Carrier

* XBeeエクスプローラ5Vマイコン用
** https://www.switch-science.com/catalog/1166/


* Xbee with I2C
** http://forum.arduino.cc/index.php?topic=20178.0