DVK-BTM521 Laird Technologies, DVK-BTM521 Datasheet - Page 14

• 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
14 www.lairdtech.com
®
Multimedia Plus Module
BTM - AT COMMAND SET
This section describes the AT Command Set for a BTM module. This section is structured in functional
groups of AT commands related to module configuration, Bluetooth profiles, hardware units and
miscellaneous purposes. The AT command set description refers to firmware version 14.1.1.0. Firmware
version can be checked by ATI3 (short) or ATI333 (full). Please also have a look the firmware release notes
for this version.
Assumptions
Command Syntax
The following syntax is employed throughout this document to describe optional or mandatory parameters for
AT commands.
General AT Commands
<bd_addr>
<devclass>
n
m
<string>
<uuid>
1. All commands are terminated by the carriage return character 0x0D, which is represented by the string
2. All responses from the BTM device have carriage return and linefeed characters preceding and
3. All Bluetooth addresses are represented by a fixed 12 digit hexadecimal string, case insensitive.
4. All Bluetooth Device Class codes are represented by a fixed six digit hexadecimal string, case insensitive.
5. All profile specific commands are identified by the prefix shown in Table 3.1
1. AT
2. ATEn
<cr> in descriptions below this cannot be changed.
appending the response. These dual character sequences have the values 0x0D and 0x0A respectively
and shall be represented by the string <cr,lf>.
Used to check the module is available.
Response: <cr,lf>OK<cr,lf>
This command enables or disables the echo of characters to the screen. A valid parameter value will be
written to S Register 506.
E0 … Disable echo.
E1 … Enable echo.
All other values of n will generate an error.
Response: <cr,lf>OK<cr,lf>
Or
Response: <cr,lf>ERROR nn<cr,lf>
Profile
Serial Port Profile
Advanced Audio Distribution Profile
Audio/Video Remote Control Profile
Headset Profile
Hands-Free Profile
Dial-Up Network Profile
A 12 character Bluetooth address consisting of ASCII characters ‘0’ to ‘9’, ‘A’ to ‘F’ and ‘a’ to ‘f’.
A six character Bluetooth device class consisting of ASCII characters ‘0’ to ‘9’, ‘A’ to ‘F’ and ‘a’ to ‘f’.
A positive integer value.
An integer value which could be positive or negative, which can be entered as a decimal value or
in hexadecimal if preceded by the ‘$’ character, e.g., the value 1234 can also be entered as $4D2.
A string delimited by double quotes, e.g., “Hello World”. The “ character MUST be supplied as delimiters.
A four character UUID number consisting of ASCII characters ‘0’ to ‘9’, ‘A’ to ‘F’ and ‘a’ to ‘f’.
{Enable/Disable Echo}
Table 3.1: AT Command prefix for profiles
Term
SPP
A2DP
AVRCP
HSP
HFP
DUN
AT-Command Prefix
AT+SP…
AT+AP…
AT+AV…
AT+HS…
AT+HF…
AT+DU…
Laird Technologies