Multitech MTS2WFA-R Bedienungsanleitung PDF herunterladen (Seite 20)

Chapter 5 – TCP Commands

Multi-Tech Systems, Inc. AT Commands for the MT800SWM & MTS2WFA (S000425D) 20

Chapter 5 – TCP Commands

#TCPDLEMODE – Coding the ETX Character

Description: When using a socket TCP, the attached host has the choice whether or not to code the

ETX character.

Syntax: Set Value: AT#TCPDLEMODE=<value>

View Value: AT#TCPDLEMODE?

Values: 0 When DLEMODE is set to 0, no specific process is needed on [ETX] characters. It

means that it is not possible for a host to request an end of connection or to receive a

clear indication of the end of a connection from the TCP/IP stack. Termination of the

TCP or UDP connection will be based on PIO (DTR) or +++ escape sequence.

1 When DLEMODE is set to 1, the [ETX] character means a request or an indication of

end of connection. As a consequence, [ETX] characters that belong to the payload

data must be sent by the host on the serial port preceded by a DLE character.

Similarly, ETX characters received by the TCP/IP stack from the Internet are sent to

the host through the serial port preceded by a DLE character.

Default Value: 0 Disable

#TCPPORT – Port of Remote Peer Used for TCP Session

Description: To exchange data over TCP, the TCP/IP stack software must know the port of the remote

peer used for the TCP session.

Syntax: Set Value: AT#TCPPORT=<value>

View Value: AT#TCPPORT?

Values: From 1 to 5 digits (each digit between 0 and 9 inclusive). Note that numbers above

65,535 are illegal as the port identification fields are 16 bits long in the TCP header.

Default Value: 1234

#TCPSERV – Address of the Remote TCP Server

Description: To exchange data over TCP, the TCP/IP stack software must know the address of the

remote TCP server (or host) that is to be used.

Syntax: Set Value: AT#TCPSERV=<value>

View Value: AT#TCPSERV?

Values: 32-bit number in dotted-decimal notation (i.e., xxx.xxx.xxx.xxx) or Alphanumeric ASCII

text string up to 120 characters if DNS is integrated. It will take a blank space also.

Default Value: None

#TCPTXDELAY – Time Delay Before Sending a TCP Frame

Description: This parameter determines the time delay introduced before sending a TCP frame that

has not been entirely filled with user data. The time is entered in milliseconds, and it

should be noted that a value of 0 initiates the sending of a TCP frame as soon as

possible after the reception of a single character value from the host.

Syntax: Set Value: AT#TCPTXDELAY=<value>

View Value: AT#TCPTXDELAY?

Values: Integer multiple of 20 between 0 and 32760 inclusive.

Default Value: 0

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