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www.lairdtech.com
Laird Technologies
BTM520/521
Bluetooth
®
Multimedia Plus Module
CONFIGURING
THE BTM520/521
APPENDIx
BT-MM+ Unsolicited Messages
BT-MM+ Error Responses
MESSAGE
COMMENT
CONNECT 0123456789012,110D
A2DP control connection established ‘0123456789012’ – bd_
addr of peer device ‘110D’ – Profile UUID indicating A2DP
NO CARRIER 110D
A2DP connection rejected or closed (if S329==0)
CONNECT 0123456789012,110E
AVRCP control connection established ‘0123456789012’ – bd_
addr of peer device ‘110E’ – Profile UUID indicating AVRCP
NO CARRIER 110E
AVRCP connection rejected or closed (if S329==0)
AVUR n <unit_id
hex
> <unit_type
hex
> <company_id
hex
>
AV Unit Info Response, sent in response to AT+AVU (UNIT INFO
Request),
<unit_id
hex
>: unit id
<unit_type
hex
>: see Table 3 9
<company_id>: IEEE Company ID
AVSR <page
dec
> <pagedata
hex
>
AV Subunit Info Response, sent in response to
AT+AVS (SUBUNIT INFO Request),
Page data: 1st word of requested page, incomplete
AVPTI <operation_id
hex
> <button_state> <subunit_id
hex
>
<subunit_type
hex
>
Indication of incoming Pass Through command
<operation_id
hex
>: see Table 3 8
<button_state>: ‘0’ – pushed
‘1’ – released
<subunit_id
hex
>: subunit id
<subunit_type
hex
>: subunit type, see Table 3 9
AVPTC n <operation_id
hex
> <state>
Confirmation of AT+AVC (Control Command Request)
n: ‘0’ – successful
‘1’ – timeout
‘2’ – not successful, other than timeout
PAIR ? <BdAddr>
Incoming pairing request from device with BdAddr
PAIR 0 <BdAddr>
Succesfully paired with device with BdAddr
PAIR 1 <BdAddr>
Pairing error
PASSKEY ? <BdAddr>
Incoming passkey request (respond with at+btb012345)
PASSKEY N <BdAddr> 012345
Passkey notification (if MITM protection is enabled)
ERROR
DESCRIPTION
01
Register not recognised
02
Value for register is out of range
03
Incoming call NOT pending
04
No call to connect to. This error code has meaning for ATO only
05
Syntax Error
06
Empty String
06
Device Class could not be stored
08
Invalid Device Class Code
09
Invalid Bluetooth Address
10
Could not set Service or Friendly name
11
PS Store Write
12
PS Store Read
13
Not Idle
14
Incorrect Mode
15
Already Scanning
16
Pairing is already in progress
17
Not USED
