Introduction; Scope Of The Document; At Command Syntax - Quectel UG Series Command Manual

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Introduction

1.1. Scope of the Document

This document presents the AT Commands Set for Quectel cellular engine UGxx series.

1.2. AT Command Syntax

The "AT" or "at" prefix must be set at the beginning of each command line. To terminate a command line
enter <CR>. Commands
"<CR><LF><response><CR><LF>". Throughout this document, only the responses are presented,
"<CR><LF>" are omitted intentionally.
The AT Commands Set implemented by UGxx is a combination of 3GPP TS 27.007, 3GPP TS 27.005
and ITU-T recommendation V.25ter and the AT Commands developed by Quectel.
All these AT commands can be split into three categories syntactically: "basic", "S parameter", and
"extended". They are listed as follows:

Basic syntax
These AT commands have the format of "AT<x><n>", or "AT&<x><n>", where "<x>" is the command, and
"<n>" is/are the argument(s) for that command. An example of this is "ATE<n>", which tells the DCE
whether received characters should be echoed back to the DTE according to the value of "<n>". "<n>" is
optional and a default will be used if it is missing.

S parameter syntax
These AT commands have the format of "ATS<n>=<m>", where "<n>" is the index of the S register to set,
and "<m>" is the value to assign to it.

Extended syntax
These commands can be operated in several modes, as following table:
WCDMA_UGxx_AT_Commands_Manual
are usually followed
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UMTS/HSPA Module Series
WCDMA UGxx AT Commands Manual
by a response that includes
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