MTD2000 AT Command Guide R12
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7
Basic Command
7.1 Command Mode – AT
This command will prompt the device to return a positive acknowledgement via the
command channel, which can be used to check the communication link between the
remote host and the device.
Syntax
Command
Response
AT
OK
Parameters
Nil
Example
Command
Response
AT
Note: Send this command via serial port to check
the corresponding communication link.
OK
Note: Send to serial port.
AT
Note: Send this command via SMS and check the
corresponding communication link.
OK
Note: Send to SMS number.
AT
Note: Send this command via network channel to
check the corresponding communication link.
OK
Note: Send to network channel.
7.2 Repeat Last Command – A/
This command will repeat the last valid command of the open session, only the A/
command itself cannot be repeated. If this command is the first one of the open
session, the response is OK without any treatment.
Syntax
Command
Response
A/
<repeat last command>
