DVK-BTM521 Laird Technologies, DVK-BTM521 Datasheet - Page 57

• Manufacturer Part Number: DVK-BTM521
• Description: BT MM DEV KIT
• Manufacturer: Laird Technologies
• Type: Transceiver, Bluetoothr

Specifications of DVK-BTM521

• Frequency: 2.4GHz
• Interface Type: RS-232
• Processor Series: BTM521
• Silicon Manufacturer: Laird Technologies
• Kit Application Type: Communication & Networking
• Application Sub Type: Bluetooth
• Kit Contents: Development Board & Software Tools
• Features: Supports CSR
• Rohs Compliant: Yes
• For Use With/related Products: BTM521
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: DVK-BTM521

BTM520/521
Bluetooth
AT COMMAND SET
REFERENCE
57 www.lairdtech.com
®
Multimedia Plus Module
Connection status
ACL connected (ATI63=1)
Audio connected (ATI63=2)
6.1.3 Release Connection from Headset
6.1.4 Headset status
6.1.5 Headset asynchronous messages
AT+HSH
Release connection from local Headset instance. Audio connection will be released if
existing, ACL will be released anyway.
A connection release, initiated by the Headset, is not defined in the Headset Profile
specification [4]. A profile compliant disconnection is initiated from Headset by sending
“AT+CKPD=200” (use “AT+HSB”) to the audio gateway.
This command was introduced for the sake of completeness and should be used for testing
purposes only.
Response:
On audio disconnection (optional): <cr,lf>HS”AU0”<cr,lf>
On ACL disconnection:
ATI63
Returns the status of the Headset (HSP) instance:
0 = not connected
1 = ACL connected
2 = Audio connected
CONNECT <bd_addr
An ACL connection to headset has been established.
<bd_addr
<uuid
<dir>
HS”RING”
HS has received a “RING” indication from the connected audio gateway. HS is expected
to respond with “AT+CKPD=200” (see “AT+HSB”).
HS”AU1”
Audio connection (SCO) has been established (= “audio on”).
HS”AU0”
Audio connection (SCO) has been released (= “audio off”).
NO CARRIER 1108
ACL connection to local HS-instance has been released. Please note section 6, page 92.
hex
>
hex
>
Outcome of AT+HSB (“AT+CKPD=200”)
Audio link will be initiated by AG
Referred to as “Audio Connection Transfer from AG to HS” in HSPv1.2
Audio link and ACL should be released by the AG, actual outcome depends
on AG
: Bluetooth address of headset device
: “1108” if it was an incoming connection
: “1112” if it was an outgoing connection.
: “<”/”>”/”I”/”O”’ optionally indicates the direction (incoming/outgoing),
please refer to S331 and section 6, page 92.
Table 3.25: Outcome of “AT+HSB”
hex
>,<uuid
hex
>[,<dir>]
<cr,lf>NO CARRIER 1108<cr,lf>
Laird Technologies