BTM410/411
Bluetooth
®
AT Data Module
23
www.lairdtech.com
Laird Technologies
AT COMMAND SET
REFERENCE
6.
SSP Input Commands
Table 3-12 lists all AT commands related to SSP input operations.
Table 3-12: SSP Input commands
AT Command
Operation
Comment
AT+BTBY
Accept pairing request
Representing ‘yes’ input
AT+BTBN
Reject pairing request
Representing ‘no’ input
AT+BTB012345
Enter 6 digit passkey displayed
by remote device
Representing keyboard input
7.
AT+BTW<bd_addr> {Initiate SSP}
This command initiates secure simple pairing (dedicated bonding) with a device whose Bluetooth
address is <bd_addr>. The correct term for this command’s action with respect to the Bluetooth
specification 2.1+EDR [1] is “Dedicated Bonding”.
Dedicated bonding means the exchange of link keys (pairing) without creating a connection to a
particular profile or service immediately.
The remote device must be a Bluetooth 2.1 device, otherwise (BT2.0 or earlier) legacy pairing will
occur automatically if S323=0. For legacy pairing please refer to page 23.
The “OK” response is sent immediately on receipt of the AT+BTW command. Depending on the
combination of IO-capabilities of both devices, one of the asynchronous messages from Table 3-14
might appear during the pairing process. Please refer to that table for the required actions.
On pairing completion, an unsolicited message in the form PAIR n <bd_addr> will be sent to the
host.
8.
S Registers for Secure Simple Pairing
The following table lists all S Registers for Secure Simple Pairing. For the registers’ details please
refer to their descriptions above.
Table 3-13: S-Registers for Secure Simple Pairing (SSP)
Register
Default
Range
Comment
S320
2
1..3
Security Level: see [1], vol3, Generic Access Profile - Table 5.7
needs subsequent ‘AT&W’ and power cycle to take effect
value = 3 overwrites S322
S321
1
0..4
Set IO capability:
0 – display only
1 – display yes no
2 – keyboard only
3 – no input no output
4 – reject IO-cap requests
S322
0
0..1
Force man-in-the-middle-protection (MITM):
0 – disabled
1 – enabled
referenced only if security level (S320) < 3
S323
0
0..1
Disable legacy (pre-BT2.1) Pairing:
0 – legacy pairing enabled
1 – legacy pairing disabled
S324
90
1..255
Secure Simple Pairing timeout in s
This value must be at least 60 in order to meet the
recommendation of BT2.1 specification
Содержание BTM410
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