SENA LS110 - Manual (Page 43)

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4.3 Options
4.3.1 DTR/DSR Behavior
The purpose of the DTR/DSR pins is to emulate modem signal control or to control TCP connection
state. The DTR is a write-only output signal, whereas the DSR is a read-only input signal, on the
LS110.
The DTR output behavior can be set to one of three types: Always HIGH, Always LOW or Show TCP
connection. If the DTR behavior is set to Show TCP connection, the state of the DTR pin will be
maintained high if the TCP connection is established.
The DSR input behavior can be set to one of three types: None, Open/Close TCP connection or Allow
TCP connection only by HIGH. Open/Close TCP connection is valid only if the host mode is a TCP
client or equivalent. If the DSR behavior is set to Open/Close TCP connection, the high state of the
DSR pin will make the LS110 send a connection request to the specified destination host, whereas the
low state close a connection. Allow TCP connection only by HIGH is valid only if host mode is TCP
server or equivalent. If this option is set, the incoming TCP connection request will be accepted only
when the DSR signal is high state.
-------------------------------------------------------------------------------
Serial port configuration
-------------------------------------------------------------------------------
1. Baud rate : 9600
2. Data bits : 8
3. Parity : None
4. Stop bit(s) : 1
5. Flow control : Hardware
6. Inter-character timeout : 0
7. Host mode : TCP Client
8. Destination IP : 192.168.23.30
9. Destination port : 7001
10. Inactivity timeout : 0
11. Cyclic connection : 0
12. DTR behavior : Always HIGH
13. DSR behavior : None
14. Allowed IP : 0.0.0.0
15. Allowed subnet : 0.0.0.0
<ESC> Back, <ENTER> Refresh
---> 12
Select DTR output behavior
1 = Always HIGH
2 = Always LOW
3 = Show TCP connection (HIGH while connected)
--->
Figure 4-13 Set up the DTR output behavior