Command Syntax - Novatel MT 3050 At Command Reference

Command Syntax

The attention or "AT" prefix is required prior to entering any command. All commands require a carriage return or
<CR> following the entry of the desired command. All command responses are encapsulated by a carriage return
and line feed or <CR><LF>. The ASCII display of these characters is suppressed with only the modem response
being presented.
In addition to terminating AT commands, the carriage return <CR> is also used to abort commands that are
executing.
Most AT commands complete immediately so there is no opportunity to abort them, for instance ATI. However,
Some commands like AT+COPS or AT+CFUN can actually take several seconds to complete. The AT command
interface is said to be in execution mode when a command is running and has not returned a result code
(OK/ERROR). A second <CR> entered while the AT command interface is in execution mode will abort the
command and return the interface to command mode.
Some AT commands require additional input, for instance AT+CMGS. After terminating the AT+CMGS command
with a <CR> the AT command interface enters line edit mode. While in line edit mode all characters are accepted
except CNTL-Z. CNTL-Z terminates line edit mode and the AT command interface enters execution mode. Like
before, at this point another <CR> will abort the command.
AT message concatenation can be done using the ; <semicolon> between commands.
The following examples demonstrate the potential usage of AT commands presented:
Type
Syntax Query
Read Syntax
Write Syntax
Execute Syntax
Command Concatenation AT+CRC=1;S0=1
Example
AT+GXXX=?
AT+GXXX?
AT+GXXX=<value>,<value>, When entered will set the command to specified value(s).
AT+GXXX
Description
When entered will return the command format and value ranges.
When entered will return the current value assigned to the command.
When entered will execute the specified command.
When entered it will execute both the CRC and S0 command.
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