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EHS6 AT Command Set
1.5 AT Command Syntax
EHS6_ATC_V03.001
15/12/3
Confidential / Released
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1.5
AT Command Syntax
The "AT" or "at" prefix must be set at the beginning of each command line. To terminate a command line enter
<CR>. Commands are usually followed by a response that includes "<CR><LF><response><CR><LF>".
Throughout this document, only the responses are presented, <CR><LF> are omitted intentionally.
Table 1.4:
Types of AT commands and responses
1.5.1
Using Parameters
• Multiple parameters are separated by commas. This applies to write commands, command responses, URCs
and result codes. Please note that throughout this document spaces behind commas may be added for better
readability.
• Optional parameters are enclosed in square brackets. If optional parameters are omitted, the current settings
are used until you change them.
• Optional parameters or subparameters can be omitted unless they are followed by other parameters. If you
want to omit a parameter in the middle of a string it must be replaced by a comma. See also example 1.
• A parameter value enclosed in square brackets represents the value that will be used if an optional parameter
is omitted.
• When the parameter is a character string, e.g.
, the string must be enclosed in quotation
marks, e.g. "Charlie Brown" or "+49030xxxx". Symbols in quotation marks will be recognized as strings.
• All spaces will be ignored when using strings without quotation marks.
• It is possible to omit the leading zeros of strings which represent numbers.
• If an optional parameter of a ITU-T V.250 command is omitted, its value is assumed to be 0.
Example 1: Omitting parameters in the middle of a string
Example 2: Using default parameter values for optional parameters
AT command type
Syntax
Function
Test command
AT+CXXX=?
The mobile equipment returns the list of parameters and value
ranges set with the corresponding Write command or by internal
processes.
Read command
AT+CXXX?
This command returns the currently set value of the parameter or
parameters.
Write command
AT+CXXX=<...>
This command sets user-definable parameter values.
Exec(ution) command AT+CXXX
The execution command reads non-variable parameters deter-
mined by internal processes in the ME.
Query current setting
+CCUG: 1,10,1
OK
Set only the middle parameter
OK
Query new setting
+CCUG: 1,9,1
OK
Setting default values for AT+CREG.
OK
Query settings.
+CREG: 0,0
AT+CREG default values are set.
OK