Syntax AT#LTCPSTART=id | Multi-Tech Systems iCell GPRS (MTSMC-G2-IP

Part 1 – AT Commands for All Universal IP DevicesChapter 5 – TCP AT Commands

#TCPTELNETUN – Set the TCP Client Telnet Protocol User Name

Description:	Configure the TCP Client Telnet protocol login user name.
	Note: This command is for all devices except the SocketWireless Wi-Fi (MT810SWM-IP)
Syntax:	AT#TCPTELNETUN=<parameter1>, <parameter2>
Values:	parameter 1
	1 TCP profile 1
	2 TCP profile 2
	parameter 2
	64 character alphanumeric string
Responses:	\r\n#TCPTELNETUN: VALUE1,VALUE2\r\n
	\r\nOK\r\n
	\r\nERROR\r\n
Examples:	send: AT#TCPTELNETUN=1,"USER"\r
	send: AT#TCPTELNETUN=1,"USER"\r
	reply: \r\nOK\r\n
	send: AT#TCPTELNETUN=1
	reply: \r\n#TCPTELNETUN: 1,"USER"\r\n
	reply: \r\nOK\r\n

#LTCPSTART – Open Listening Mode

Description: This command, sent by the attached host, directs the TCP/IP stack to open a listening TCP connection on the specified TCP port.

Once an IP link is established, the attached host can open a listening TCP socket at any time (except when the TCP/IP stack software is already in a process using TCP resources).

The TCP connection will be active upon reception of a TCP connection request sent by a remote allowed TCP peer (TCPSERV) on the appropriate TCP port (TCPPORT).

Once opened, this TCP connection may be closed by the remote TCP peer or by the attached host by sending an ETX character on the serial port (depending on the DLEMODE parameter).

Notes:

The LTCP command can be aborted before an incoming TCP request has been received by issuing an <ETX> character on the serial port.

If the DLEMODE parameter is set to 1, the TCP/IP stack will interpret an <ETX> character only as a close request if a <DLE> character does not precede it. 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 the DLEMODE parameter is set to 0, the TCP/IP stack will never close the TCP connection (unless an error occurs).

Syntax: AT#LTCPSTART=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.

#TCPTELNETUN – Set the TCP Client Telnet Protocol User Name

AT#TCPTELNETUN=<parameter1>, <parameter2>

Values:

Examples:

#LTCPSTART – Open Listening Mode

Syntax: AT#LTCPSTART=id

iCell GPRS (MTSMC-G2-IP specifications