
BTM410/411
Bluetooth
®
AT Data Module
51
www.lairdtech.com
Laird Technologies
APPENDIX
Register
Deflt.
Range
Description
S512
1
0..7
Specify power up state.
When set to 0, AT+BTO is required to open the device for
Bluetooth® activity.
When set to 1, it proceeds to a state as if AT+BTO was entered.
When set to 2, it will be discoverable only, similar to issuing
AT+BTQ.
When set to 3, it will be connectable but not discoverable e.g.
AT+BTG
When set to 4, it will be connectable and discoverable e.g.
AT+BTP.
When set to 5, it will be like 2, but all UART RX traffic is
discarded in absence of a connection while DSR is asserted. If
DSR is not asserted, then it behaves exactly as per mode 2.
When set to 6, it will be like 3, but all UART RX traffic is
discarded in absence of a connection while DSR is asserted. If
DSR is not asserted, then it behaves exactly as per mode 3.
When set to 7, it will be like 4, but all UART RX traffic is
discarded in absence of a connection while DSR is asserted. If
DSR is not asserted, then it behaves exactly as per mode 4.
Note that by implication, a change to this can only be seen
after a power cycle AND if AT&W is
S514
10
1..60
Pairing Timeout in seconds. This includes the time a host takes
to supply the PIN number when PIN? Messages are indicated.
S515
$001F00
$000000.
.
$FFFFFF
Default Device Class Code. When queried, the value is always
printed as a hexadecimal number.
To change the device class of the module temporary and
immediately without power cycle, use the command AT+BTC.
To change the device class of the module permanently, write
the new value to this S Register (ATS515=$<devclasshex>), save
the setting (AT&W) and initiate a power cycle (ATZ).
S516
$000000
0..
$2FFFFFF
Default Device Class filter to be used with AT+BTI when it is not
explicitly specified. When queried the value is always printed as
a hex number.
The seventh most significant digit, can be 0,1 or 2, and is used
to specify the type of device class filter.
When 0, it specifies no filtering.
When 1, it specifies an AND mask and all 24 bits are relevant
When 2, it specifies a filter to look for devices with matching
major device class which occupies a 5 bit field from bits 8 to 12
inclusive (assuming numbering starts at bit 0). All other 19 bits
MUST be set to 0.
S517
20
2..61
Inquiry Length in units of seconds. This parameter is referenced
by the AT+BTI command.
S518
8
0..255
Maximum number of responses from an inquiry request. This
parameter is reference by the AT+BTI command. If this number
is set too high, then AT+BTI will return ERROR 27. For a
particular firmware revision, determine the effective maximum
value by trial and error. That is, set to a high value, send AT+BTI
and if ERROR 27 is returned, then retry with a smaller value.
This effective max value will remain unchanged for that
particular firmware build.
Содержание BTM410
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