BTM-220 module (How to leave DUT mode)

fandango · Joined: 05 Jul 2011 Posts: 1

Hi,

I did hack an old Motorola access point, and I found a BTM-220A module inside.
I used it to build an interface for my ATmega protoboard, like schematic from Micropet Basisboard (googled).
Attached is a photo of the hand-made board.

Everything seems to work, so I receive informations through Realterm. However, when I sent a command "AT", the module change to DUT mode (I supouse Device Under Test mode) and it doesn't accept serial commands anymore.

I did tryed to pull PIO4 up to restore configurations, but didn't work.

Any idea?

Well, when I power-on the board (first time), I did capture the following messages through Realterm: