DS18S20

#!/bin/bash
#
# script which reads and outputs DS18S20 temperature reading
# assuming:
#     modules w1-gpio and w1-therm loaded into kernel
#
# example - if your DS18S20 id is 28-000001b451d9, then
# to get it's temperature reading in Celsius use:
# DS18S20 28-000001b451d9
#
 
if [ -z "$1" ]; then
     echo usage: $0 DS_id
     exit
fi

FILE="/sys/bus/w1/devices/$1/w1_slave"
AWKPRG='BEGIN { FS="=| "}; /NO/ {INVALID=1} // {SUM += $NF} END {if(INVALID){exit 1} else {print SUM/1000}}'

timeout 5s sh <<hereDocument
until awk '$AWKPRG' $FILE; do : nothing ; done
hereDocument

xively-room-temperature

#!/bin/bash    
#
# simple script to upload temperature from DS18B20 http://xively.com
# assuming:
#     xively script is on the path (https://gist.github.com/VaclavSynacek/8766523)
#     channel "room-temperature" had been created on xively
#     DS18B20 script (above) is on the path
#     DS18B20 id is 28-000001b451d9 (to find yours 'ls /sys/bus/w1/devices')
#
# just put this to /etc/cron.minutely or /etc/cron.hourly and be happy
#
#

DS18B20 28-000001b451d9 | xargs xively room-temperature