Android Thermostat Control Script

#!/bin/sh
#Script to control Android Thermostat via command line.
#http://androidthermostat.com
# Born: 1/24/2013 -JGB
# Modified:

#### Change below to the ip address of your Android Thermostat ###
tstatip=


##### DO NOT CHANGE ANYTHING BELOW THIS LINE #####

### Get script arguments ###
mode=$1
temp1=$2
temp2=$3

##### Functions #####

script_usage() {
        echo Usage:
        echo ""
        echo This script requires command line options.
        echo The first option is 'Mode'
        echo Valid options for Mode are: Off, Heat, Cool, Auto
        echo ""
        echo The second option is desired temperature
        echo This should be a 2 digit Number
        echo ""
        echo If using Auto Mode, You must specify a third option
        echo ""
        echo Example: ./script.sh Auto LOW_TEMP HIGH_TEMP
        echo Example: ./script.sh Auto 70 75
        echo ""
    echo If using 'Off' no 2nd command line option is required.
exit
};

arg_check() {
        ARGS_GOOD=
        if [ "$mode" == 'Heat' ] || [ "$mode" == 'Cool' ]; then
                if [ -z "$temp1" ] || [ "$temp1" -lt '50' ] || [ "$temp1" -gt '95' ]; then
                        script_usage
                    ARGS_GOOD=0
        fi
        elif [ "$mode" == 'Auto' ]; then
                if [ -z "$temp1" ] || [ -z "$temp2" ] || [ "$temp1" -lt '50' ] || [ "$temp1" -gt '95' ] || [ "$temp2" -lt '50' ] || [ "$temp2" -gt '95' ]; then
                        script_usage
                ARGS_GOOD=0
        fi
        elif [ "$mode" == 'Off' ]; then
        ARGS_GOOD=1
    else
        script_usage
        ARGS_GOOD=0
fi
};

##### End Functions #####

### Check script input ###
arg_check

### Get current settings from tstat ###
curloutput=$(curl -s http://$tstatip:8080/api/settings);
#add -S if you want to see errors, but not output

#echo Here is what we got from the tstat:
#echo $curloutput
#echo ""

##### Choose sed command based on input #####
if [ "$mode" == 'Heat' ]; then
    target=targetLow
    #sedline=s/\"targetLow\":[0-9]\{1,3\}/\"targetLow\":$temp1/g
    #sedline=s/\"$target\":[0-9]\{1,3\}/\"$target\":$temp1/g";"s/\"mode\":\"[A-z]\{1,4\}\"/\"mode\":\"$mode\"/g
    sedcurloutput=$(echo "$curloutput" | sed -e "s/\"$target\":[0-9]\{1,3\}/\"$target\":$temp1/g" -e "s/\"mode\":\"[A-z]\{1,4\}\"/\"mode\":\"$mode\"/g");
fi
if [ "$mode" == 'Cool' ]; then
    target=targetHigh
    #sedline=s/\"targetHigh\":[0-9]\{1,3\}/\"targetHigh\":$temp1/g
    #sedline=s/\"$target\":[0-9]\{1,3\}/\"$target\":$temp1/g";"s/\"mode\":\"[A-z]\{1,4\}\"/\"mode\":\"$mode\"/g
    sedcurloutput=$(echo "$curloutput" | sed -e "s/\"$target\":[0-9]\{1,3\}/\"$target\":$temp1/g" -e "s/\"mode\":\"[A-z]\{1,4\}\"/\"mode\":\"$mode\"/g");
fi

if [ "$mode" == 'Auto' ]; then
    target=
    #sedline=s/\"targetLow\":[0-9]\{1,3\}/\"targetLow\":$temp1/g";"s/\"targetHigh\":[0-9]\{1,3\}/\"targetHigh\":$temp2/g";"s/\"mode\":\"[A-z]\{1,4\}\"/\"mode\":\"$mode\"/g
    sedcurloutput=$(echo "$curloutput" | sed -e "s/\"targetLow\":[0-9]\{1,3\}/\"targetLow\":$temp1/g" -e "s/\"targetHigh\":[0-9]\{1,3\}/\"targetHigh\":$temp2/g" -e "s/\"mode\":\"[A-z]\{1,4\}\"/\"mode\":\"$mode\"/g");
fi

if [ "$mode" == 'Off' ]; then
    target=
    #sedline=s/\"mode\":\"[A-z]\{1,4\}\"/\"mode\":\"$mode\"/g
    sedcurloutput=$(echo "$curloutput" | sed -e "s/\"mode\":\"[A-z]\{1,4\}\"/\"mode\":\"$mode\"/g");
fi

#echo ""
#echo sed curloutput
#echo "$sedcurloutput"


### sed patterns ###
#Change only mode
#sedlinemode=s/\"mode\":\"[A-z]\{1,4\}\"/\"mode\":\"$mode\"/g
#Change mode and temp (Heat/Cool)
#sedlinetemp=s/\"$target\":[0-9]\{1,3\}/\"$target\":$temp1/g
#Change mode and both temps (Auto)
#sedlineauto=s/\"targetLow\":[0-9]\{1,3\}/\"targetLow\":$temp1/g";"s/\"targetHigh\":[0-9]\{1,3\}/\"targetHigh\":$temp2/g

#echo Sed line variables:
#echo "$sedlinemode"
#echo "$sedlinetemp"
#echo "$sedlineauto"
#echo Variables after if statements
#echo "$target"
#echo "$sedline"

#set -x will show you the actual curl line when running. This is useful for debug.
#set -x
#echo ""
#echo curl post
#echo ""
# if &>/dev/null is not at the end of the next line, curl shows the text "output" on the command line.
curl -s -H "Accept:: application/json" -H \"Content-type: application/json\" -X POST -d "$sedcurloutput" http://$tstatip:8080/api/settings &>/dev/null