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MC55 AT Command Set
1.4 AT command syntax
1.4
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 "
document, only the responses are presented,
Types of AT commands and responses:
AT command type
Test command
Read command
Write command
Exec(ution) command
1.4.1
Using parameters
•
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. See also example 2.
•
When the parameter is a character string, e.g.
marks, e.g. "Charlie Brown" or "+49030xxxx". Symbols within quotation marks will be recognized as strings.
•
All spaces will be ignored when using strings without quotaton marks.
•
It is possible to omit the leading zeros of strings which represent numbers.
•
If an optional parameter of a V.25ter command is omitted, its value is assumed to be 0.
MC55_ATC_V01.05
Confidential / Released
<CR><LF>
are omitted intentionally.
<CR><LF>
Syntax
AT+CXXX=?
AT+CXXX?
AT+CXXX=<...>
AT+CXXX
or
<text>
<number>
Page 17 of 469
s
<response>
". Throughout this
<CR><LF>
Function
The mobile equipment returns the
list of parameters and value ranges
set with the corresponding Write
command or by internal processes.
This command returns the currently
set value of the parameter or
parameters.
This command sets user-definable
parameter values.
The execution command reads
non-variable parameters deter-
mined by internal processes in the
GSM engine.
, the string must be enclosed in quotation
m
obile
2/10/04
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