User's Manual

Enhanced Class 1 Bluetooth v2.1 Module
User’s Guide
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CONN-GUIDE-BT740_v0.2
Figure 8-7: Just Works sequence diagram
The EVT_SIMPLE_PAIRING displays a success/fail indication. If it fails, then the EVT_LINK_KEY event
does not send to the host.
8.15.1.2 Simple Secure Pairing ‘Display Yes/No’
The message sequence diagram for when the device has display and yes/no capability is as follows:
Figure 8-8: Display Yes/No capability sequence diagram
The first EVT_SIMPLE_PAIRING contains a passcode that needs to be confirmed by the host. To confirm
the passcode, the host sends a CNF_SIMPLE_PAIRING packet which has a passcode value of
00000001; to reject it, uses a value of 00000000.
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.
8.15.1.1 Simple Secure Pairing ‘Display Only’
The message sequence diagram for when the device has display only capability is as follows: