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AT+i Programmer's Manual - SE Spezial-Electronic AG

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15 Wireless LAN Mode<br />

Wireless LAN Mode<br />

The iChip includes a wireless LAN driver for the Marvell 88W8686 802.11b/g WiFi<br />

chipset. In addition, the iChip firmware contains a WPA supplement with an<br />

implementation of WPA-PSK with TKIP and WPA2-PSK with AES for this chipset.<br />

WPA security requires a parameter that contains the Personal Shared Key (PSK),<br />

sometimes referred to as the ‗Pass-Phrase.‘ The Wireless LAN Pass Phrase (WLPP)<br />

access command is used to set the passphrase parameter. When passphrase contains a<br />

value, iChip uses WPA security when connecting to an Access Point (AP). Note,<br />

however, that for WPA-PSK to be active, the ssid parameter (+iWLSI command) must<br />

also be defined. This parameter has precedence over WEP parameters. In other words,<br />

when WLPP contains a value (and WLSI is defined) WPA is used – even if WEP<br />

parameters are defined. The maximum allowable wireless LAN transmission rate is<br />

determined by the WLTR command.<br />

The type of WPA protocol to be used is determined by the value of the W<strong>SE</strong>C parameter:<br />

a ‗0‘ value means the WPA-TKIP protocol will be used, whereas a ‗1‘ value specifies the<br />

WPA2-AES protocol.<br />

<strong>AT+i</strong> Programmer‘s <strong>Manual</strong> Version 8.21 15-1

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