Multitech MTCMR-E1 Bedienungsanleitung PDF herunterladen (Seite 48)

Chapter 6 – UDP AT Commands

48 Universal IP AT Commands Reference Guide

#UDPSERV – UDP Server Address

Description: If the UDP session is initiated in listen mode, use the IP address filter. This means that the

remote must have a defined UDPSERV IP address. If the UDP session is initiated in active mode,

use the remote IP address.

Syntax: AT#UDPSERV=<Value>

AT#UDPSERV? Read or display the current setting.

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. No default.

#UDPTXDELAY – Delay before Sending UDP Datagram

Description: This parameter determines the delay before sending an UDP datagram that has not been

entirely filled with user data. The delay is expressed in milliseconds. The 0 value initiates the

sending an UDP datagram as soon as possible after the reception of a single character value

from the host.

Syntax: AT#UDPTXDELAY=<Value>

AT#UDPTXDELAY? Read or display the current setting.

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

Default: 100

#UDPDLEMODE – Set DLE Mode

Description: The attached host has the choice whether or not to code the ETX character.

This command is for all devices except the SocketWireless Wi-Fi (MT810SWM-IP).

Note: If UDPDLEMODE is disabled, the user MUST use the RS232 DTR signal to perform a

socket disconnect or disconnect the network connection

Details: If UDPDLEMODE is enabled, these rules must be followed: The user must shield all transmitted

ETX ([x03]) and DLE (x10) characters by preceding these characters with a DLE (x10). The UIP

stack will shield all UDP received ETX ([x03]) and DLE (x10) characters by preceding these

characters with a DLE (x10), the user must un-shield by removing the DLE (x10) shield character.

An example payload to transmit from user to UIP stack:

(x01 x02 x03 x04 x01 x10) must be sent to the UIP stack as: (x01 x02 x10 x03 x04 x01 x10 x10).

Notice the x10 before the [x03] and before the x10.

An example received payload by the UIP over UDP:

(x01 x02 x03 x04 x01 x10) is received by the UIP stack, the user will receive: (x01 x02 x10 x03 x04

x01 x10 x10). Notice the x10 before the [x03] and before the x10.

In summary: Encoding - 0x03 == 0x10 0x03

Encoding - 0x10 == 0x10 0x10

Decoding - 0x10 0x03 == 0x03

Decoding - 0x10 0x10 == 0x10

The REMOTE user does NOT have to perform any function pertaining to this mechanism.

If the user receives an un-shielded 0x03, the socket is finished.

Syntax: AT#UDPDLEMODE=<parameter1>

AT#UDPDLEMODE? Read or display the current setting.

Values: 0 – No extra processing is needed on DLE (x10) and ETX ([x03]) characters

1 – The ETX character is used as a socket disconnect or indicates a socket disconnect

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