DVK-BTM521 Laird Technologies, DVK-BTM521 Datasheet - Page 78

• 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
78 www.lairdtech.com
®
Multimedia Plus Module
Task
Set HFG supported features
Inquire HFG status
(1) AT+HFGC1 is the only possible response to HFG”Dnnn”. If the HFG wants to reject this call attempt from the HF, it
must issue AT+HFGC1 first and subsequently AT+HFGCH.
(2) HFG”D>mmm” and HFG”L” can alternatively be responded to with HFGE to confirm that the requested operation was
not successful (i.e. memory location invalid or last dialled number not available).
8. DUN (Dial-Up Networking Profile)
The Dial-up networking profile (DUN,[6]) defines protocols and procedures for the dial-up networking
use case. Scenarios are the usage of a wireless modem or a cellular phone for dial–up Internet
connections or the usage of a wireless modem or cellular phone to receive data calls by a PC.
There are two roles defined:
In order to map these roles to the conventional modem structure, the Gateway is referred to as Data
Circuit Endpoint (DCE), and the Data Terminal is referred to as Data Terminal Endpoint (DTE).
A BTM module is required to be controlled by a host processor using AT commands (hosted operation
mode). BTM DUN implementation supports DT role only.
The DUN profile belongs to the group of serial stream oriented profiles (SSO). The appropriate
implications and restrictions are described on page 24.
An AT command beginning with AT+DU... indicates affiliation to the DUN profile.
1.) Gateway (GW)-This device provides access to the public network (e.g., cellular phone or modem),
2.) Data Terminal (DT)-This device uses the dial-up services of the Gateway (e.g., PC), and is
and is not supported on BTM.
supported on BTM.
Table 3.33: AG-HFP (HFG) – Summary of S Registers and AT Commands
AT-Command / S Register
S596
ATI66
Comment
Bitmask
Bit 0 – three way calling
Bit 1 – echo cancellation and/or noise reduction function
Bit 2 – voice recognition function
Bit 3 – In-band ring tone capability
Bit 4 – Attach a number to voice tag
Bit 5 – Ability to reject call
Bit 6 – Enhanced call status
Bit 7 – Enhanced call control
Bit 8 – Extended Error Result Codes
Note:
Bit 0…Bit 4 of these settings are advertised in the
Service Record of the HFG. The default value is 0x68
which means Bit 3, Bit 5 and Bit 6 set. After a new
value was set, the commands “AT+BTW” and “ATZ”
are required for the new value to become effective.
Make sure that Bit 6 is always set because this is a
mandatory feature for HFP1.5 – AG.
0 = not connected
1 = SLC connected
2 = Audio connected
3 = in call – SLC
4 = in call – audio
5 = call setup: ringing (incoming call) / dialling
or alerting (outgoing call) – SLC
6 = call setup: ringing (incoming call) / dialling
or alerting (outgoing call) – audio
8 = in call but no SLC
Laird Technologies