Senatek HELLODEVICE LITE SERIES LS100 Manuale Utente

 

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To configure the LS100 to work as a TCP server, use ‘set’ command as follows: 

 

Listening TCP port is the TCP port number through which remote host can connect a TCP session, 

and, send and receive data. Incoming connection request to the ports other than  Listening TCP Port 

will be rejected. The LS100 does not restrict the number to a specific range, but it is strongly 

recommended not to use the well-known ports for certain application (See Appendix D.  Well-known 

Port Numbers). To change the port number,  select menu 2  on  the  TCP Server mode configuration 

screen. 

Inactivity timeout is set to maintain the TCP connection state as Closed or Listen in TCP host mode 

unless there is any data transfer between the serial device and the LS100. If there is no incoming or 

outgoing data through the serial port during the specified  inactivity timeout interval, the existing TCP 

connection will be closed automatically. 

If the value of inactivity timeout is set to 0, the current TCP connection is maintained unless there’s no 

connection close request. Although inactivity timeout is disabled, the LS100 will check the connection 

status between the LS100 and the remote host by sending  “keep alive” packets periodically. If the 

remote host does not answer the packets, it is regarded  that the connection is down unintentionally. 

Then, the LS100 will force to close the existing TCP connection. 

At least, this value should be set larger than that of inter-character timeout. To prevent the unintended 

loss of data due to the  session disconnection, it is highly recommended that this value is set large 

enough so that the intended data transfer is completed. 

 

Figure 4-2 shows TCP server mode setting example: 

 

> set host tcps 6001 300 
OK 
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