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:
ATE ============================== BS-P100 MA BUILD MA2.0.031 DATE 20060926 ============================== [RPS] ======================== m = FFFF8093 BM = 0 T1 = 800 T2 = 70 DT = 0 C = 55 ======================== license:VALID AccessM < NA > BCCMD_CFM MB ID : 0xF7B [HookOn] CH0 ========================== [BDADDR] 00:07:88:47:2E:48 [PINCODE] 544295 ========================== W L Name Sec. : 0x03, Enc. : 0x00 [dsp_setup_pre] [dsp_R] [dsp_RR] [dsp_setup] ................................................................. [daa_R] [daa_RR] DAA Reg Ctrl2: 0x00 DAA Reg Ctrl2: 0x00 DAA Reg Ctrl2: 0x00 DAA Reg Ctrl2: 0x00 DAA Reg Ctrl2: 0x00 0th DAA err DAA: ISR AccessM < GA > DAA_CID_ON: 0x00 CH0 _CUT AA : 12sec AA : 12sec AA : 12sec AA : 12sec
... and so, after 12 seconds, repeatedly AA : 12sec. So, I sent the command "AT" through Realterm and immediatly, the module restarts informing "Reboot DUT". After this, the module was entered in DUT mode, and did not accepted any command (as showing in the attached prinscreen). I would like to interface this Bluetooth module with an ATmega32 in SPP mode. Any suggestions of how to leave this DUT mode? Thank you in advance. Regards.