A bit of C code to connect a ELV WS 300 PC [II] or Conrad WS 444 PC weather station to AWEKAS (WSWIN (awekas.txt) mode). Tested with an Asus WL-500gP WLAN router and OpenWRT: 
# opkg install kmod-usb-uhci-iv kmod-usb-serial-ftdi
# insmod ftdi_sio vendor=0x1b1f product=0xc006
# /www/cgi-bin/ws300_sio [debug]
My father's weather station
Sven Killig 2010

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Apache/2.2.16 (Debian) DAV/2 SVN/1.6.12 PHP/5.3.3-7+squeeze3 with Suhosin-Patch mod_ssl/2.2.16 OpenSSL/0.9.8o Server at sven.killig.de Port 80