Appendixes; Appendix 1 At Command Description; Basic Commands; S Register Command - Huawei MU509 At Command Interface Specification

HUAWEI MU509 HSDPA LGA Module
AT Command Interface Specification

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,
and 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 manufacturers begin with "^". All extended commands and
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Appendixes

Appendixes
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