General AT Commands for the Cinterion® ELS61 Wireless Module

AT commands, or the Hayes command set, are instructions for controlling modules. The commands consist of a series of short text strings for a range of uses, including:

  • Configuring a module
  • Establishing the module's network connection
  • Discovering module and connection status information, to ensure they are working correctly
  • Managing the module
  • Encrypting and transporting data to and from the module
  • Directly accessing the cloud

You can find a full set of the Cinterion® ELS61 Wireless Module AT commands here:

Cinterion® ELS61-E2 AT Command Set PDF

Your software will need to send test, read and write AT commands to the Cinterion® ELS61 Wireless Module.

Before you begin

Before you use any AT commands on the modem, ensure that it is ready to receive them.

To test that the modem is ready to receive AT commands:

  1. Using a terminal emulator that is connected to your modem, type:


    The terminal emulator will return any of the following:

    OK – the modem and port are connected and ready to communicate

    ERROR – the modem and port cannot communicate. Contact the modem supplier.

    Nothing – ensure you have set the correct baud rate in your code. For more information, see Connecting to the LTE Cat.1-xx click.

AT Command syntax

Use the following syntax:



  • AT is in upper or lowercase
  • <COMMAND> is a test, read or write command in upper or lower case
  • <CR> is the end-of-line character marking the end of a command line (alias \r – carriage return)

    The modem will execute the command line after receiving the end-of-line character.

  • <LF> is the line feed, which will move the cursor to the next line

This document displays commands only. <CR><LF> after a command is intentionally omitted.

AT commands are usually followed by a response that includes:


where <RESPONSE> is the command response

This document displays responses only. <CR><LF> is intentionally omitted.

The response may include:

  • OK – indicates the command executed with no errors
  • ERROR – indicates an invalid command, or that the command line was too long

Types of AT Commands and responses

Command type Command syntax Description


Returns a list of parameters and value ranges set by the corresponding Write command or internal processes.



Returns the currently set value of each parameter.




Sets the user-defined parameter values.



Reads non-variable parameters affected by internal processes in the Eseye-enabled modem. For example, see CCID – request unique SIM number (ICCID).

Thales supply a large set of AT commands that work with the Cinterion® ELS61 Wireless Module. You may find AT+CCID, AT+CREG, AT+CEREG, AT+CGREG and AT+CSQ useful. For more information, see the Thales AT command set documentation.