Technical information

Chapter 2: AT+i Commands Reference
May 31, 2008 AT+i Commands Reference Manual 2-159
Wireless LAN Parameters
+iWLCH - Wireless LAN Communication Channel
+iWLSI - Wireless LAN Service Set Identifier
Syntax: AT+iWLCH=<channel>
Sets the default WiFi communication channel.
When W24 is configured to operate in ad-hoc mode, this
parameter must be given a value between 1 and 13 that defines
the channel to be used for beacon transmission. When W24 joins
an already existing ad-hoc network, it adopts that network's
channel.
Parameters: channel = 0-13.
Default: 0 (Access Point).
Result Code:
I/OK If channel =0-13.
I/ERROR Otherwise.
AT+iWLCH? Reports the currently configured WiFi communication channel
followed by I/OK.
AT+iWLCH=? Returns the message '0-13'. The reply is followed by I/OK.
Syntax: AT+iWLSI=<ssid>
Sets the destination Wireless LAN Service Set IDentifier (SSID)
string.
Parameters: ssid = SSID required for communications with a specific Access
Point (AP). The AP must be configured with the same SSID.
Command Options:
ssid='' Empty. No SSID defined. W24 will communicate with any AP.
ssid=<ID> ID will be used as the destination SSID. ID must be configured in
the AP for W24 to successfully communicate with that AP.
ssid=* Prevents W24 from automatically attempting to connect to an AP
or ad-hoc network immediately after power-up. If the ssid
parameter value is changed to (*) while W24 is already connected
to an AP, the current connection will not be affected.
ssid=! Optional flag indicating ad-hoc mode. Upon power-up, W24 will
continuously search for existing ad-hoc networks in its vicinity
and join the one having the strongest signal.