heat_tweet.sh

#!/bin/bash
# heat_tweet.sh 
#
# This script will send a tweet each time the Heat or AC
# goes on or off
#
# It uses the data generated by get-nest-info.sh to determine
# current state and to update the state change files

#
# Check https://github.com/shmick/pi-scripts/ for latest version
#
# Twitter: @shmick

# Give the get-nest-info.sh cron job a few seconds to finish 
sleep 5

NESTDATA="/ramdisk/nest-info.txt"
HEATSTATEFILE="/ramdisk/heatstate"
COOLSTATEFILE="/ramdisk/coolstate"

TWEETCMD="python $HOME/pi-scripts/tweet.py"

GatherData()
{
if [[ -e $NESTDATA ]]

then
	HeatMode=$(grep FurnaceOn $NESTDATA | awk '{print $2}')
	CoolMode=$(grep AirConOn $NESTDATA | awk '{print $2}')
	OutsideTemp=$(grep OutsideTemp $NESTDATA | awk '{print $2}')
	InsideTemp=$(grep InsideTemp $NESTDATA | awk '{print $2}')
	TargetTemp=$(grep TargetTemp $NESTDATA | awk '{print $2}')
	Humidity=$(grep RelativeHumidity $NESTDATA | awk '{print $2}')
	RelHumid=$(grep OutsideHumidity $NESTDATA | awk '{print $2}')
	Time=$(date +%H:%M)
	TweetString=""
	Type=""
	Mode=""
else
	echo "Sorry no datafile to read, exiting"
	exit
fi
}

StateCheckAndUpdate()
{
if [[ -e $HEATSTATEFILE ]] && [[ -e $COOLSTATEFILE ]]

then 
	HEATSTATE=$(cat $HEATSTATEFILE)

	if [ "$HeatMode" = "1" ] && [ "$HEATSTATE" = "0"  ]
	then
		Type=Heat
		Mode=ON
		echo 1 > $HEATSTATEFILE

	elif [ "$HeatMode" = "0" ] && [ "$HEATSTATE" = "1"  ]
	then
		Type=Heat
		Mode=OFF
		echo 0 > $HEATSTATEFILE
	fi

	COOLSTATE=$(cat $COOLSTATEFILE)

	if [ "$CoolMode" = "1" ] && [ "$COOLSTATE" = "0" ]
	then
		Type=AC
		Mode=ON
		echo 1 > $COOLSTATEFILE

	elif [ "$CoolMode" = "0" ] && [ "$COOLSTATE" = "1"  ]
	then
		Type=AC
		Mode=OFF
		echo 0 > $COOLSTATEFILE
	fi
else
	if [[ -n "$HeatMode" ]] && [[ -n "$CoolMode" ]]
	then
		echo $HeatMode > $HEATSTATEFILE
		echo $CoolMode > $COOLSTATEFILE
	fi
fi
}

CreateTweet()
{
if [ "$Type" = "" ]
then
	exit
else
	TweetString="$Type $Mode at ${Time}, \
	Target = $TargetTemp°C, \
	Inside = $InsideTemp°C, \
	Outside = $OutsideTemp°C, \
	Outside RH = $RelHumid%, \
	Inside RH = $Humidity% \
	"
fi
}

SendTweet()
{
if [ "$TweetString" = "" ]
then
	exit
else
	$TWEETCMD "$TweetString"
fi
}      

GatherData
StateCheckAndUpdate
CreateTweet
SendTweet