HUAWEI MU509 HSDPA LGA Module
AT Command Interface Specification
Appendixes
Issue 04 (2013-01-28)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
212
17
Appendixes
17.1 Appendix 1 AT Command Description
17.1.1
Basic Commands
The format of a basic command is:
<command>[<number>]
Where, <command> is a single letter (A
–Z) or a “&” plus a single letter, and <number>
is a decimal number composed of one or more digits. The 0s at the head of <number>
will be ignored. If a basic command that can carry <number> carries no <number>,
the <number> value is 0 by default. If a basic command that cannot carry <number>
carries a <number>, the information “TOO MANY PARAMETERS” will be returned.
17.1.2
S Register Command
All commands that begin with “S” are collectively called “S register command”.
Command format:
S<parameter number>?
S<parameter number>=<value>
The S register command name is composed of the letter “S” combined with a decimal
number. This decimal number is called “register sequence number (parameter
number)”. If the register is not identified, it indicates that this command does not exist,
a
nd the “ERROR” information will be returned. Each S register saves a character. If
the command name is followed by “?”, it indicates a READ recommend. The ASCII
code values currently saved in this S register expressed by a 3-digit decimal number,
will be returned. Make up three digits by filling 0s at the end if there are less than 3
digits. If the command name is followed by “=”, the command is a SET command. In
this case, replace the characters stored in this S register with the characters
corresponding to the <value>.
17.1.3
Extended Commands and Manufacturer Defined
Commands
The extended commands begin with “+”. The commands defined by the manufacturer
also begin with a special character, e.g. “$”, “^”. For purpose of this document, all
commands defined by man
ufacturers begin with “^”. All extended commands and