HUAWEI ME906E LTE M.2 Module
AT Command Interface Specification
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Copyright © HUAWEI Technologies Co., Ltd.
the DCE, it shall terminate the command in progress and return an appropriate result
code to the DTE, as specified for the particular command.
The following commands can be aborted.
Can be aborted except "AT+COPS=?"
1.7 Rules for Running AT Commands
1. Each interface should be functionally convergent.
2. Each command line contains only one AT command and ends with a carriage
return character. For the URC instruction or response reported from MT to TE,
only one AT command is allowed in a command line. In principle, users are not
allowed to run S3/S4 format modification commands. This rule is applicable to the
communication between the MT and TE programs.
3. For an AT command that cannot be interrupted, after sending the AT command,
the TE must wait until the MT responds to the AT command before sending the
second AT command.
4. For the AT command to which the response is given only after a long time, in
order to prevent interference on other events, it is recommended to report the
final execution result asynchronously. If the ME responds to the TE only after a
long time of waiting, the response of command may be interrupted by URC.
There are two kinds of interruption:
− Case 1: A URC is presented when the TE is waiting for response after sending
a command. This command will be kept in waiting state until the TE finishes
receiving the URC, and then the response to this command is presented.
− Case 2: A URC is presented when the TE is waiting for response after sending
a command. The command continues to be executed. Therefore, response to
the command may be mixed with the URC.
5. A string refers to a byte stream (excluding the quotation marks or commas) that is
placed inside double quotation marks. Special note should be specified if the byte
stream need not be enclosed in double quotation marks.
6. The current version does not support escape character. The code value of a data
format in the UCS2 coding is reported as characters. For example, if the UCS2
code of a Chinese character is 0x553a, the 553a is reported.
7. A possible response sent by the MT to the TE consists of Information text and
Result code, in which Information text is optional and Result code is mandatory.
The format of a possible response is controlled by the ATV command. For details,
see the description of the ATV Command. In this document, all possible
responses listed in tables follow the ATV1 format.