User's Manual

Enhanced Class 1 Bluetooth v2.1 Module
User’s Guide
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CONN-GUIDE-BT740_v0.2
In that situation, when a pairing procedure is detected, a pincode request event packet is sent to the host
and the host responds with a CMD_PINCODE or CNF_PINCODE command as shown in the message
sequence diagram below (Figure 8-11). It responds with CNF_PINCODE if it is in the middle of making a
connection and a response for ‘make connection’ is still pending.
If the host does not send a pincode command, then the peer that initiated the pairing eventually timeouts.
8.15.1.3 Legacy Pairing
The message sequence diagram for incoming legacy pairing is as follows:
Figure 8-11: Legacy Pairing sequence diagram
8.15.1.4 Simple Secure Pairing ‘Just Works’
The message sequence diagram for ‘Just Works’ when the device has specified no I/O capability is as
follows:
Figure 8-12: Just Works with no I/O capability sequence diagram
The EVT_SIMPLE_PAIRING displays a success indication.
8.15.1.5 Simple Secure Pairing ‘Display Yes/No’
The message sequence diagram for when the device has display and yes/no capability is as follows: