Dlemode Value Notes | Multi-Tech Systems iCell GPRS (MTSMC-G2-IP

Part 1 – AT Commands for All Universal IP Devices

Chapter 5 – TCP AT Commands

#LTCPSTOP – Close TCP Listening Mode

Description: This command directs the TCP/IP stack to close a TCP listening mode (previously launched by the AT#LTCPSTART command.

Syntax: AT#LTCPSTOP=id

id:Enter a Profile Setting: 1 or 2 {1,2}

Values: DLEMODE TCPPORT TCPSERV TCPTXDELAY

#OUTPORT – UDP/TCP Local Port Number

Description: Controls the local port that the UDP/TCP connection is bound to.

Syntax: AT#OUTPORT=<Port Number value>

AT#OUTPORT? Read or display the current setting (or AT#VALL ).

Values: Set the port number local connection will use: From 1 to 5 numeric digits (0 to 9).

Note: Numbers above 65,535 are illegal since port identification fields are 16-bits long in the IDP header.

Default: 37500

#OTCP – Open a TCP Connection

Description: This command sent by the attached host directs the TCP/IP stack to open a TCP connection to the specified TCP server. Once an IP link is established, the attached host can open a TCP connection at any time (except when the TCP/IP stack software is already in a process using TCP resources).

This TCP connection may be closed by the remote TCP server or by the attached host via sending an ETX character on the serial port (depending on the DLEMODE parameter).

DLEMODE Value Notes:

Depending on the DLEMODE value, the attached host may close this TCP connection by sending an ETX character.

•If the DLEMODE parameter is set to 1, the TCP/IP stack will only interpret an <ETX> character as a close request if it’s not preceded by a <DLE> character. As a consequence, the attached host must send <ETX> characters preceded by <DLE> characters, and it must also code <DLE> characters in <DLE><DLE>. Similarly, each <ETX> character present in the payload data of the TCP frame will be coded by the TCP/IP stack on the serial port as <DLE><ETX>. Each <DLE> character will be coded as <DLE><DLE>. The attached host must then decode the TCP socket flow to remove these escape characters.

•If DLEMODE is set to 0, the host cannot close the TCP connection (unless an error occurs).

	If the remote TCP server closes the connection, the TCP/IP stack sends an ETX character on the
	serial port.
Syntax:	AT#OTCP=id
id:	Enter a Profile Setting: 1 or 2 {1,2}
Values:	DLEMODE
	TCPPORT
	TCPSERV
	TCPTXDELAY

Universal IP AT Commands Reference Guide (Document S000457K)

iCell GPRS (MTSMC-G2-IP specifications

Multi-Tech Systems iCell GPRS (MTSMC-G2-IP) is a versatile and powerful device designed for seamless connectivity in various applications, particularly in industrial and commercial environments. Known for its robust performance, the iCell GPRS module incorporates advanced technologies that enable effective communication over GPRS networks, making it an ideal solution for IoT applications, remote monitoring, and data collection processes.

One of the main features of the iCell GPRS is its dual SIM capability, which enhances network reliability and ensures continuous connectivity even in the event of network outages. By allowing the use of two SIM cards from different carriers, the device can switch between networks automatically, thereby minimizing downtime and maintaining critical communication channels.

The iCell GPRS supports various protocols including TCP/IP, UDP, and MQTT, which facilitates seamless integration with a range of applications. This flexibility in communication protocols allows developers to create customized solutions tailored to their specific needs, ensuring that the device can fit seamlessly into their existing infrastructure.

Another key characteristic of the MTSMC-G2-IP is its compact design and durability, making it suitable for deployment in a variety of environments. It features a wide operating temperature range that allows it to function efficiently in both extreme heat and cold, thereby catering to diverse applications across different industries. Additionally, the device is designed for easy installation and integration, which helps reduce deployment time and costs.

The iCell GPRS also includes built-in security features such as firewalls and secure data transmission protocols, protecting sensitive information from unauthorized access. This is particularly important for applications in sectors such as healthcare, finance, and transportation, where data integrity and security are paramount.

Furthermore, the device is equipped with various I/O ports that facilitate connectivity with external sensors, actuators, and other hardware. This feature makes it highly adaptable for monitoring and control systems, enabling users to gather real-time data and respond promptly to changing conditions.

In sum, the Multi-Tech Systems iCell GPRS (MTSMC-G2-IP) is a reliable and feature-rich solution designed for modern communication needs. Its dual SIM support, protocol versatility, robust design, and integrated security features make it an ideal choice for IoT and remote monitoring applications across numerous industries. Whether used in industrial automation, environmental monitoring, or smart cities, the iCell GPRS stands out as a dependable device that enhances connectivity and operational efficiency.