GSM Module
1
General Description
1.1
Description of AT Commands
ME3000_V2 provides AT command interfaces, through which the module could
communicate with the external devices conveniently. The AT commands set provided by
ME3000_V2 module not only covers the standard GSM voice call and SMS applications, but
adds some other commands based on GSM specification and some ZTE exclusive
commands for users to use conveniently.
1.1.1
Type of AT Commands
As a standard interface, the returned values and formats of AT commands are both fixed. As
a whole, the AT commands could be divided into four types:
Non-parameter commands: a type of simple commands with the format of
AT[+|&]<command>,e.g.: AT+CSQ, AT&W
Query commands: used to inquire the current setting value with the format of
AT[+|&]<command>?, e.g.: AT+CNMI?
Help commands: used to list the possible parameters of the command with the format of
AT[+|&]<command>=?, e.g.: AT+CMGL=?
Parameter commands: normally used format which provides strong flexibility with the
format of AT[+|&]<command>=<par1>,<par2>,<par3>…
The returned values of this type of commands are all the same. This will be clarified in details
later. The basic frame format of the returned value is:
<CR><LF><Response string><CR><LF>
<CR><LF><OK/ERROR>[ERROR INFO]<CR><LF>
1.1.2
Returned Format of AT Commands
The following describes the AT commands and returned descriptions supported by
ME3000_V2 module:
AT command returned format:
--<CR><LF><corresponding strings ><CR><LF>
--An exceptional case: e.g.: AT+ZPOWEROFF, directly return with “OK”
AT command status report (OK, ERROR):
--If there is error in AT command format, return with “ERROR”;
--If AT command executes successfully, return with “OK”;
1.1.3
AT Command Format
AT command starts with “AT” and ends with <CR>;
After the module runs, the serial port default setting will be: 8-digit data bit, 1-digit stop bit,
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