Sena HelloDevice Pro PS110 Series User Manual page 48

Established
4.2.3.2. UDP mode
The UDP mode operation is similar to that of TCP mode except that it is based on UDP protocol and
only one pre-defined remote host is able to communicate with the Pro Series. Users do not have to
configure cyclic connection, since UDP is a connectionless protocol.
Sync-Sent
TCP connection request accepted
Incoming data via serial port
Incoming data
from remote host
Accept
Sync-Recvd
Incoming data via serial port
Figure 4-5 State Transition Diagram of TCP mode
TCP connection request rejected
Or internal TCP time-out
In-coming TCP Close request
Inactivity time-out
Data
Reject
Incoming TCP connection request
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Closed
Listen