Multitech MTCBA-G-F2 Bedienungsanleitung PDF herunterladen (Seite 48)

Appendix A – Getting Started Examples

Multi-Tech Systems, Inc. AT Commands for Wireless Modems with IP Connectivity (S000333D) 48

TCP Socket

Open a TCP socket between machines. One machine acts as a caller (TCP client); the other acts as a listener (TCP

server). Both machines have to be connected to the Internet and set to the same TCP port.

Act as a TCP Server: AT#LTCPSTART

Commands Responses

AT#TCPSERV=1,”255.255.255.255”

Note: No filter of the incoming TCP client

AT#TCPPORT=1,”23”

Note: TCP port between the TCP client and the

TCP server must be the same

AT#LTCPSTART=1

Note: Launch the listening mode; waiting for an

incoming TCP connection from a TCP client

OK_Info_WaitingForDate

Note: Message sent over the serial port in case of successful

TCP socket opening (Telnet for example in the IP address)

Data

Note: Data flow is bidirectional

Data

Note: Data flow is bidirectional

Note: The socket can be closed locally by the

attached host sending an [ETX] character

(CTRL+C on the keyboard)

Note: The socket can be closed by the remote

OK_Info_SocketClosed

Act as a TCP Client: AT#OTCP

Commands Responses

AT#TCPSERV=1,”xxx.xxx.xxx.xxx”

Note: No filter of the incoming TCP client

AT#TCPPORT=1,”23”

Note: TCP port between the TCP client and the

TCP server must be the same

AT#OTCP=1

Note: Open as a TCP client, a socket TCP with

remote TCP server

OK_Info_WaitingForDate

Note: Message notifying the socket opening and the switch in

data mode

Data

Note: Data flow is bidirectional

Data

Note: Data flow is bidirectional

Note: The socket can be closed locally by the

attached host sending an [ETX] character

(CTRL+C on the keyboard)

Note: The socket can be closed by the remote

OK_Info_SocketClosed

Note: The closing of the socket can be performed either locally or remotely.

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