LPWA Module Series
BG95&BG77&BG600L Series TCP/IP Application Note
BG95&BG77&BG600L_Series_TCP/IP_Application_Note 13 / 56
2
TCP/IP AT Commands
2.1. AT Command Introduction
2.1.1. Definitions
<CR>
Carriage return character.
<LF>
Line feed character.
<...>
Parameter name. Angle brackets do not appear on command line.
[...]
Optional parameter of a command or an optional part of TA information response.
Square brackets do not appear on command line. When an optional parameter is
omitted, the new value equals its previous value or its default setting, unless otherwise
specified.
Underline
Default setting of a parameter.
2.1.1. AT Command Syntax
All command lines must start with
AT
or
at
and end with
<CR>
. Information responses and result codes
always start and end with a carriage return character and a line feed character:
<CR><LF><response><CR><LF>
. Throughout this document, only the commands and responses are
presented, while carriage return and line feed
characters are deliberately omitted.
Table 2: Types of AT Commands
Command Type
Syntax
Description
Test Command
AT+<cmd>=?
Test the existence of corresponding Write
Command and return information about the
type, value, or range of its parameter.
Read Command
AT+<cmd>?
Check the current parameter value of a
corresponding Write Command.
Write Command
AT+<cmd>=<p1>[,<p2>[,<p3>[...]]]
Set user-definable parameter value.
Execution Command
AT+<cmd>
Return a specific information parameter or
perform a specific action.
