I had this AREDN Air router working for a few months, but somehow it got "stupid". It keeps rebooting every 25 or so seconds, and it never establishes an ethernet connection to my PC. The computer sees something, then it reports the ethernet cable is disconnected, and this repeats.
I opened up the Airrouter, to see if maybe there was a bad electroytic cap or such I could fix. That wasn't it. I then saw a header on the board "UART" I connected a TTL level serial connection to that and my PC. For once I guessed correct as to which pin is TX and RX. Upon powerup I get: