HUAWEI MG323 GSM M2M Module

 

 

AT Command Interface Specification

 

Overall Description

Figure 1-2Basic organization format the AT command line

 

 

 

read command for checking

subparameter

current subparameter values

 

 

command line prefix

extended commands are

command line

delimited with semicolon

termination character

 

ATCMD1 CMD2=12; +CMD1; +CMD2=,,15; +CMD2?; +CMD2=?<CR>

 

 

 

 

subparameters

basic command

 

 

may be omitted

(no + prefix)

 

 

 

 

extended command

test command for checking

 

 

 

 

(prefixed with +)

 

 

 

 

possible subparameter values

 

 

 

 

 

The returned value of the AT command consists of two parts: response message and result codes. Figure 1-3 shows an example of returned value of the AT command.

Figure 1-3An example of returned value of the AT command

information response to +CMD2=?

also string type subparameters possible

 

information response to +CMD2?

 

<CR><LF>+CMD2: 3,0,15,"GSM"<CR><LF>

<CR><LF>+CMD2: (0-3),(0,1),(0-12,15),("GSM","IRA")<CR><LF> <CR><LF>OK<CR><LF>

shows acceptable ranges of each subparameter

final result code

1.4.2 Types of AT Commands

AT commands are categorized into three types: basic commands, S register commands, and extended and vendor-defined commands.

A basic command starts with a single letter or with the & symbol plus a single letter. Table 1-1 describes the format of a basic command.

Issue 02 (2010-11-23)

Huawei Proprietary and Confidential

3

Copyright © Huawei Technologies Co., Ltd.

 

 

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Huawei MG323 manual Types of AT Commands, Prefixed with +