User's Manual

Enhanced Class 1 Bluetooth v2.1 Module
User’s Guide
Americas: [phone] Option 2
Europe: [phone]
Hong Kong: [phone]
www.lairdtech.com/wireless
84
CONN-GUIDE-BT740_v0.2
Figure 8-13: SSP, Display Yes/No sequence diagram
The first EVT_SIMPLE_PAIRING contains a passcode that must be confirmed by the host. To confirm the
passcode, the host sends a CNF_SIMPLE_PAIRING packet which echoes the passcode. To reject it, the
host uses any non-matching value.
If pairing is successful, another EVT_SIMPLE_PAIRING with a success value is sent and then a
EVT_LINK_KEY event is sent to the host, if not the second EVT_SIMPLE_PAIRING displays a 00000000
value.
8.15.1.6 Simple Secure Pairing ‘Display Only’
The message sequence diagram for when the device has display only capability is as follows:
Figure 8-14: SSP, Display Only sequence diagram
The first EVT_SIMPLE_PAIRING contains the passcode which must display. When the peer confirms the
passcode or otherwise a second EVT_SIMPLE_PAIRING is sent to the host with an appropriate
success/fail code.
If pairing is successful, EVT_LINK_KEY is sent to the host; if not RSP_PAIR_INITIATE indicates a non-ok
status code.
8.15.1.7 Simple Secure Pairing ‘Keyboard Only’
The message sequence diagram for when the device has keyboard only capability is as follows: