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Laird Technologies
BTM510/511
Bluetooth
®
Multimedia Module
CONFIgurINg
THE BTM510/511
REGISTER
DEFAULT
RANGE
COMMENT
S531
0
0..5
Specifies the mode on connection establishment.
0 = Normal, that data is exchanged between UART and RF
1 = LOCAL_COMMAND. UART input is parsed by the AT interpreter
and RF data is discarded
2 = REMOTE_COMMAND. RF input is parsed by the AT interpreter and UART
data is discarded. If S Reg 536 is not 1 then this register cannot be set
to 2 and an ERROR will be returned
3 = LOCAL_COMMAND. UART input is parsed by the AT interpreter
and incoming RF data is sent to the host using the RX<string>
asynchronous response.
4 = LOCAL_COMMAND and on the rf side, the gpio is automatically sent
when there is a change in input. See section 9.5 for more details.
5 = DEAMON mode
S532
0
0..7
If non zero then on every connection, a SCO channel (audio) will be initiated.
Bit 0 for HV1, Bit1 for HV2 and Bit2 for HV3. When the connection is lost,
the SCO channel disappears along with it.
S533
1
0..2
If set to 1 then GPIO5 follows RI state, if set to 2 then it follows the state of
DSR and if 0 it is not driven and GPIO5 is available as a user I/O.
This register will not necessarily be effective immediately after changing the
value. It must be saved to non-volatile memory using AT&W and will operate
as expected after an ATZ or a power cycle.
S534
1
0..2
When set to 0, GPIO4 is available as user i/o
If set to 1 then GPIO4 follows DCD state. If set to 2 then GPIO4 behaves
as per setting 1, but in addition, when not in a connection, if the device is
connectable or discoverable, then GPIO4 will blink.
This register will not necessarily be effective immediately after changing the
value. It must be saved to non-volatile store using AT&W and will operate as
expected after an ATZ or a power cycle.
S535
20
0..41
Link Supervision Timeout. If units go out of range, then a NO CARRIER
message will be sent to the host after the time specified here
S536
0
0..1
When set to 1, a remote device can ‘capture’ the AT parser of this unit by it
sending this module an escape “!!!” sequence. The inter character timing is
set via S Register 12.
If S Register 507 is >= 2, then reading this register will always return 0 and
writing 1 will result in ERROR 33.
S538
0
0..1
If 1, then when a successful pairing occurs, it is automatically saved in the
trusted device database – if it has room to store it.
S539
0
0..1
When set to 1, in idle mode (S512=1), UART Rx characters are discarded if
DSR is deasserted.
S541
6
-50..6
This sets the power level in dBm when inquiring or paging. Reading this
register returns the value stored in non-volatile memory.
S542
6
-50..6
As per S541, however reading this register returns the current power level as
set in the base band. The read can be different from S541because the actual
power is set using a lookup table and the base band rounds down to the
nearest value in the table.
S543
0
0..1
If this is set to 1, then incoming pairing attempts will be accepted (if a pin
code has been pre-entered using AT+BTK) while in the wait phase of auto
connect cycle initiated by the AT+BTR command. In addition to accepting
pairing attempts, if the pairing is successful, then the new device is
automatically set as the peer address for automatic connections
(as if an explicit AT+BTR command was entered).
See S Register 505 and 530 also
