User's Manual

41
www.lairdtech.com
Laird Technologies
BTM510/511
Bluetooth
®
Multimedia Module
4.2 Output Gain Settings – A2DP Sink
AT+GOU / AT+GOD
AT+GOU – Increment audio output gain (volume).
AT+GOD – Decrement audio output gain (volume).
Response:
<cr><lf>OK<cr><lf>
<cr><lf>ERROR 57<cr><lf> – Maximum gain level reached
<cr><lf>ERROR 58<cr><lf> – Minimum gain level reached
The output gain level can be set directly using S register 589. Alternatively, S register 689 can be
used to set the required overall output gain in dBr multiplied by 10. Please refer to section 1, page 74.
4.3 Input Gain Settings – A2DP Source
AT+GIU / AT+GID
AT+GIU – Increment audio input gain.
AT+GID – Decrement audio input gain.
Response:
<cr><lf>OK<cr><lf>
<cr><lf>ERROR 57<cr><lf> – Maximum gain level reached
<cr><lf>ERROR 58<cr><lf> – Minimum gain level reached
The input gain level can be set directly using S register 590. Alternatively, S register 690 can be
used to set the required overall input gain in dBr multiplied by 10. Please refer to section 1, page 74.
4.4 Release A2DP Connection
AT+APH / ATH110D
Release an A2DP connection by AT+APH. Alternatively, ATH110D can be used. (110D presents
the UUID for the A2DP prole). Please refer to section4, page 83.
4.5 Supported Features – A2DP Sink
S312
Use S Register 312 to set the A2DP sink supported features that will be advertised in the A2DP
service record. Refer to Table 3.16. The S register needs to be saved (AT&W) and the module
needs to be power cycled (ATZ) for a new value to become effective.
4.6 Supported Features – A2DP Source
S313
Use S Register 313 to set the A2DP source supported features that will be advertised in the A2DP
service record. Refer to Table 3.16. The S register needs to be saved (AT&W) and the module
needs to be power cycled (ATZ) for a new value to become effective.
Task AT-Command / SRegister Comment
Enable A2DP prole S102 128 = A2DP, Error 46 if A2DP role has not been
set (see S300)
Needs subsequent AT&W and ATZ to
become effective
Set A2DP role S300 [0..2] 0 = feature not set
1 = A2DP Sink (default)
2 = A2DP Source
Needs subsequent AT&W and ATZ to
become effective
AT COMMAND SET
REFERENCE