Laird BTM410, User Manual

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BTM410/411
Bluetooth
®
AT Data Module
19 www.lairdtech.com Laird Technologies
AT COMMAND SET
REFERENCE
The inquiry process can be speed up if the friendly name is not required (flag not set in S330) as
part of the inquiry response or if a <dev_class> filter is used.
Table 3-8: S Register 330 controlling inquiry response format
Bit 7 6 5 4 3 2 1 0
Reserved for future use EIRD RSSI FN COD ADR
Default 0 0 0 0 0 0 0 1
Table 3-9: Field Descriptions for S Register 330
Field Description
0 – ADR 1 – display Bluetooth device address on inquiry result
0 – do not display Bluetooth device address on inquiry result; if any further
bit is set, a comma is inserted as separator
1 – COD 1 – display class of device on inquiry result
0 – do not display class of device on inquiry result; if any further bit is set, a
comma is inserted as separator
2 – FN 1 – display friendly name on inquiry result
0 – do not display friendly name on inquiry result; if any further bit is set, a
comma is inserted as separator
3 – RSSI 1 – display RSSI value on inquiry result
0 – do not display RSSI value on inquiry result; if any further bit is set, a
comma is inserted as separator
4 – EIRD 1 – display eird on inquiry result
0 – do not display eird on inquiry result
Inquiry Response format
The format of an inquiry result will be:
<cr,lf><bd_addr>,<dev_class>,<friendly_name>,<rssi>,<eir_data><cr,lf>
<bd_addr> = 12 digit, hexadecimal;
<dev_class> = 6 digit, hexadecimal;
<friendly_name> = printable ASCII character, enclosed by ‘ “ ‘
<rssi> = signed 2 digits decimal
<eir_data> = printable ASCII character whenever possible, otherwise a byte is displayed as:
¬2 digit hexadecimal with preceding ‘\’, enclosed by ‘ “ ‘
For example, the data block 01 41 42 43 44 02 03 45 46 04 0A 0D will be presented as:
“\01ABCD\02\03456\04\0A\0D”
No validation is performed on incoming EIR data.
If a higher significant flag is set and a lower significant bit is not set in S 330, for each disabled
item a comma is printed.
Example: S330 = 9 (ADDR enabled, COD and FN disabled, RSSI enabled)
Inquiry Response:
<cr,lf>123456789012,,,-54
<cr,lf>123456789014,,,-54
<cr,lf>OK<cr,lf>