Slightly modified version of Project 1 in "Arduino meets Linux" by Bob Hammell.
I'm using an RHT003 temperature/humidity sensor (equivalent to DHT22 at Adafruit) rather than the MCP9808 temperature sensor that he used.
Original version of the css, fonts, and images at http://www.arduinomeetslinux.com/download/project1-a.tar.gz.
Added the following to my /etc/config/uhttpd file:
# certificate defaults for px5g key generator
config cert px5g
# config for 2nd website
config uhttpd site2
list listen_http 0.0.0.0:80
option home /mnt/sda1/www2
option rfc1918_filter 0
option max_requests 2
option network_timeout 30
option tcp_keepalive 1
option index_page index.py
list interpreter ".py=/usr/bin/python"
option script_timeout 60
(Also revised the main configuration to have
list listen_http 0.0.0.0:81`
Created a directory /mnt/sda1/www2 and moved index.py, css/,
fonts/, and images/ there. Installed TempHumid_WebPanel.ino on
Yun.