A bit of C code to read out a ELV WS 300 PC [II]/Conrad WS 444 PC weather station (WSWIN (awekas.txt) format). Tested on an Asus WL-500gP WLAN router and OpenWRT Linux:

# opkg install kmod-usb-uhci-iv kmod-usb-serial-ftdi
# /etc/modules.d/65-usb-serial-ftdi or use a ftdi_sio.[k]o including my patch to add USB IDs 1b1f & c006
# /www/cgi-bin/ws300_sio [debug]