At Commands; At Command Set Summary - Sierra Wireless AirLink ES440 User Manual

C: AT Commands
Rev 1 Nov.14

AT Command Set Summary

Using a terminal connection (Telnet) or SSH protocol, you can send
AT commands to configure the device, command it to do something,
or query a setting.
• AT commands must always be terminated by a carriage return
<CR> (ASCII character 0x0D), i.e., pressing enter on the
keyboard. Some may also include a new line or line feed <LF>.
• If E=1 (Echo On), the AT command (including the terminating
<carriage return>) is displayed (output) before any responses.
• Two settings affect the format of AT command output: V
(Verbose) and Q (Quiet).
• If Q=1 (Quiet On), no result codes are output whatsoever, so
there is no response generated by a (non-query) command.
• If Q=0 (Quiet Off), result codes are output. The format of this
output is then affected by the Verbose setting.
If Quiet mode is off, the result code is affected as follows:
For V=1 (Verbose mode), the textual result code is
surrounded by a carriage return and new line. Any AT query
response is also surrounded by a carriage return and new
line.
For V=0 (Terse mode), a numeric result code is output with a
single trailing carriage return (no new line is output), while
any AT query response is followed by a carriage return and
new line (there is no preceding output).
• For example, possible output to the AT command "AT" with
carriage return (assuming quiet mode is not on) is:
carriage return — if V=0
carriage return and new line OK another carriage return and
new line — if V=1
Note: AT commands work for the port on which they are executed. For
example, if the user types ATE1 and then AT&W using a USB/serial port
connection, it sets the USB/serial port to Echo On but not the telnet
connection or the RS232 serial port.
If you need to change the port for Telnet (for example, you have the
default port blocked on your firewall), the option is on the Services >
Telnet/SSH tab. The default Telnet port is 2332. You can also change
the Telnet timeout; if the connection is idle, default timeout is 2
minutes. This is the internal Telnet on the device to pass AT
commands and not TCP PAD.
C
293