bash script to control amazon fireTV

#!/bin/bash -e

#script by wolf on 3.9.2016


#-config--------------------------------------
ip="192.168.1.26"



#-constants-----------------------------------
cmd_command=(w x a d . b h m p n)
cmd_help=(w x a d . b h m p n SPACE ENTER ESC)
cmd_value=(19 20 21 22 26 4 3 1 88 87)
cmd_name=(up down left right power back home menu previous next play/pause enter exit)




#-help------------------------------------------
for ((i=0;i<${#cmd_name[*]};i++))
  do
echo ${cmd_help[i]} = "${cmd_name[i]}"
done



#-connect to firetv----------------------------
echo "starting server... please wait..."
msg=`adb start-server`
echo "$msg"
msg=`adb connect $ip`
echo "$msg"

exit_flag=0

#-handle user input----------------------------
while [ $exit_flag = 0 ]
  do
#use IFS variable to recognize SPACES with read command
IFS= read -n 1 -s command


unset msg


for ((i=0;i<${#cmd_value[*]};i++))
  do

if [[ $command = ${cmd_command[$i]} ]]
  then
    msg=`adb shell input keyevent ${cmd_value[$i]}`
fi

done    #for


case "$command" in
         $'\E') echo "exiting..."
         exit_flag=1
            ;;
         "") msg=`adb shell input keyevent 66`
            ;;
         " ") msg=`adb shell input keyevent 85`
            ;;
esac


done    #while



#-exit gracefully-----------------------

msg=`adb disconnect $ip`
echo $msg
msg=`adb kill-server`
echo $msg

exit 0