INSYS WLAN 2.1, Manual

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INSYS WLAN serial 2.1 Overview AT Commands
Command Description
AT&L<n>
Automatic connection setup
If no connection to the defined remote terminal exists, an automatic attempt
to establish a connection is performed every 20 seconds. The remote terminal
is set with the command
AT&Z0
.
AT&L0
Deactivates the automatic connection setup (default)
AT&L1
Activates the automatic connection setup
Additional notes regarding the leased line mode
AT&L1
:
AT&L1
must only be set at the devices connected to the leased line. The other
device should be configured to automatic connection acceptance with
ATS0=1
. For the stability of the connection it is also advisable to activate Keep
alive (
AT#KEEP
) on both sides.
These settings can be stored with
AT&W
in the power fail-safe memory.
AT#MSS=<n>
Set maximum segment size
A maximum TCP segment size can be set using the command
AT#MSS
. This
setting is only required under special circumstances, if the transmission is done
via routers which do not support the maximum standard setting for the seg-
ment size of 1459 bytes.
AT#MSS=<n>
Set maximum TCP segment size. n=1...1460, default = 1460
The setting can be queried with
AT#MSS?
.
This setting is immediately stored in the permanent memory (independent
from the command
AT&W
).
AT#NM=<sub net-
work mask>
Set network mask
AT#NM
sets the address range of the local network in connection with
AT#IP
.
All packets that are not sent to the local network, are sent to the gateway ad-
dress set by
AT#GW
.
Factory setting:
AT#NM=255.255.255.0
IP address, gateway and network mask must be coordinated in the local net-
work segment.
The setting can be queried with
AT#NM?
.
This setting is immediately stored in the permanent memory (independent
from the command
AT&W
). It will only take effect after a restart.
AT&O<n>
Set the function of the OH line
AT&O0
OH is active (low) as soon as a physically functioning WLAN
link is available, i.e. the module is registered at the access
point. (default)
AT&O1
OH is active (low), as soon as a connection (TCP/IP or
UDP/IP) is active
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