User's Manual
38
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Laird Technologies
BTM510/511
Bluetooth
®
Multimedia Module
Phase Dev. AT Command Comment
Preparation B AT&F* Restore factory default settings
A2DP prole is enabled per default in S102
ATS300=2 Enable Audio Source role
ATS515=$080400 Set A2DP device class (source)
AT&W Store settings
ATZ Reset
Initiate
Connection
B AT+APD<BdAddr_
DevA>
Response:
“PAIR 0…” (pairing successful, A and B)
“CONNECT…” (connected, A and B)
Connected Play music from the audio source
Music should be audible on the headphones/speakers. If not:
check audio output of the audio source (e.g., connect head-
phones directly to audio source for a test)
Adjust
Volume
A AT+GOU Increment volume (audio output gain) by one
AT+GOD Decrement volume (audio output gain) by one
B AT+GIU Increment volume (audio input gain) by one
AT+GID Decrement volume (audio input gain) by one
Note: the audio input gain (A2DP source) is a critical setting
because the optimal setting cannot be veried by objective
means by the module itself.
Disconnect A/B AT+APH Response “NO CARRIER 110D”: disconnection conrmed
Table 3.14: A2DP Example 2 Command Sequence and Instructions
Figure 3.12: A2DP Example 2 – Preparation of Device A (Sink)
Figure 3.13: A2DP Example 2 – Preparation of Device B (Source)
AT COMMAND SET
REFERENCE