Product Info

Bluetooth Serial Module

AT Command Set

Date : 3 Feb 03 Issue No : 1.9 Doc No : XRBLU020-001SW-0 Page 18 of 38

2.2.49 AT+BTR? {Display Peer Address}

This command is used to display the peer address stored in non-volatile storage, used to put the module in

pure cable replacement mode.

Response: <cr,lf>12346789012

<cr,lf>OK<cr,lf>

If the location is empty the the response is as follows.

Response: <cr,lf>00000000000

<cr,lf>OK<cr,lf>

2.2.51 AT+BTAn {Control Audio Channel}

Once a Bluetooth connection is active, and assuming the peer device is a TDK Serial Module, this

command is used to start/stop a SCO channel which will connect the PCM interfaces of the two peer

devices. This means that if a codec is attached to the PCM pins, then 2 way audio can be established.

The parameter is 0 to switch off the channel and it is 1 to switch it off.

On receipt of the command, the following response immediately follows.

Response: <cr,lf>OK<cr,lf>

The lower layers then go through the process of seting up the SCO channel, and as soon as a SCO link is

established, the following response is asynchronously sent to the host.

Response: <cr,lf>AUDIO ON<cr,lf>

Or if the SCO failed to be established …

Response: <cr,lf>AUDIO FAIL<cr,lf>

On the peer device, the host will asynchronously get ….

Response: <cr,lf>AUDIO ON<cr,lf>