DVK-BTM521 Laird Technologies, DVK-BTM521 Datasheet - Page 58

• 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
58 www.lairdtech.com
®
Multimedia Plus Module
Task
Enable HSP-HS role
Initiate ACL from headset
Send “Button pressed” (HS)
Disconnect from HS
Enable “ATH” for HS
Inquire HS status
[HSG] or
BTM5xx
[HFG]
6.2 Audio gateway role (AG-HSP / HSG)
AT Command
6.1.6 Headset summary
Audio gateway role (for HSP) is activated by setting flag 0x08 in S102 plus “AT&W” plus “atz“.
Figure 3.23 outlines a block diagram of an audio gateway with a BTM5xx in hosted operation mode.
Interface
Table 3.26: Headset role (HSP) – Summary of S Registers and AT Commands
Audio
(set of buttons / keypad / display)
Audio routing
Telephone control
AT-Command / S Register
S102
AT+HSD<bd_addr
AT+HSB
AT+HSH / ATH1108 / ATH*
S332
ATI63
Figure 3.23 Audio Gateway block diagram
local microphone
local speaker,
Controller
control
Host
hex
>
Comment
0x02 = HS role of HSP (bitmask), needs
subsequent “AT&W” and “atz” to
activate
Responses:
successful: “CONNECT
123456789012,1112,>”
failed: “NO CARRIER”
profile disabled: “ERROR 59”
incorrect state: “ERROR 63”
Sends “AT+CPKD=200” to the
connected gateway
For test purposes only, because
disconnection initiated by HS other than
sending “AT+CKPD=200” to gateway is
not defined in HSP specification.
Enable HS disconnection “ATH1108”
and “ATH*”
0 = disabled (default)
1 = enable
Should only be enabled for test purpos-
es, because disconnection initiated by
HS other than sending “AT+CKPD=200”
to gateway is not defined in HSP speci-
fication.
0 = not connected
1 = ACL connected
2 = Audio connected
Termination
Mobile
Laird Technologies
Network