875-000072 User Manual
9
2.2.
Socket functions
SERIAL DEVICE SERVER socket support TCP Server, TCP Client, UDP Server, UDP Client and HTTPD Client.
2.2.1.
TCP Client
TCP Client provides Client connections for TCP network services. TCP Client device will connect to server to
realize data transmission between the serial port and server. According to the TCP protocol, TCP Client has
connection/disconnection status differences to ensure reliable data transmission.
TCP Client mode support Keep-Alive function: After connection is established, module will send Keep-Alive
packets about every 15 seconds to check the connection and will disconnect then reconnect to TCP server if
abnormal connection is been checked by Keep-Alive packets. TCP Client mode also support non-persistent
function.
SERIAL DEVICE SERVER work in TCP Client mode need connect to TCP Server and need set the parameters:
Remote Server Addr and Remote Port Number. SERIAL DEVICE SERVER
work in TCP Client won’t accept other
connection request except target server and will access server with random local port if user set local port to
zero.
User can set SERIAL DEVICE SERVER in TCP Client mode and related parameters by setup software or web server as
follows: