LimitlessLED controller bash program using sendip

#!/bin/bash

tty -s; if [ $? -ne 0 ]; then konsole -e "$0"; exit; fi
# tty returns the path of the terminal or "not a tty" into stdout. As well as the exit codes 0 and 1 respectivly.
# -s means tty will only return the exit code and not output to stdout. this is retrived with $? (holds exit code for last executed statement)
# if its nonzero, it means its not a terminal, such as double clicking to open, this leads the if to launch the script path again, which is held in $0, with the desired terminal

# Codes:
#
# Off = 0x4100
# On = 0x4200
# DiscoSpeedSlower = 0x4300
# DiscoSpeedFaster = 0x4400
# Group1AllOn = 0x4500
# Group1AllOff = 0x4600
# Group2AllOn = 0x4700
# Group2AllOff = 0x4800
# Group3AllOn = 0x4900
# Group3AllOff = 0x4A00
# Group4AllOn = 0x4B00
# Group4AllOff = 0x4C00
# DiscoMode = 0x4D00
# SetColorToWhite = 0xC200
# SetColorToWhiteGroup1 = 0xC500
# SetColorToWhiteGroup2 = 0xC700
# SetColorToWhiteGroup3 = 0xC900
# SetColorToWhiteGroup4 = 0xCB00
# Brightness = 0x4EXX (XX brightness in hex from 02 to 1B, 25 levels)
# Color = 0x40XX (XX color from 0 to 255 in hex, 00 to FF)
#
# Via - https://github.com/danvy/miled/blob/master/src/MiLED.SharedLib/LEDCommands.cs
#
#sudo sendip -d 0xCA00 -p ipv4 -p udp -ud 8899 192.168.1.110 - group3 nightmode lower than 0x4E02
#
# To run. remove sudo and run as root, or
# add:
#    <user> ALL=(root) NOPASSWD: /usr/bin/sendip 192<WiFi box ip>
# to sudoers file using visudo. replacing <user> and <WiFi box ip> with correct values.
# udp hex values are correct for port 8899. Port 50000 uses different values and/or tcp.

wifiControllerIP="192.168.1.110"

commandStart="sudo sendip -d 0x"
commandEnd=" -p ipv4 -p udp -ud 8899 $wifiControllerIP"

on="4200"
off="4100"

white="c200"

colorPrefix="40"
brightnessPrefix="4e"

Group1On="4500"
Group1Off="4600"
Group2On="4700"
Group2Off="4800"
Group3On="4900"
Group3Off="4A00"
Group4On="4B00"
Group4Off="4C00"

wmctrl -a "lightControl.sh"

function properClear {
   clear
   echo -en "\e[3J"
}

function wakeUpBox {
   wget -q --tries=5 --timeout=10 --spider -O - http://192.168.1.110 > /dev/null

   echo "Wake up box command sent..."
   echo
}

function displayMenu {
   properClear
   echo
   echo "What do you want to do?"
   echo
   echo "1. Turn All Lights On"
   echo "2. Turn All Lights Off"
   echo "3. Turn Specific Group On/Off"
   echo "4. Switch to White"
   echo "5. Color Selection"
   echo "6. Brightness Selection"
   echo
   echo "---"
   echo
   echo "W. Wake up LED WiFi Box"
   echo "N. Night time mode (G1 - 1% / G2 - 30%)"
   echo "Q. Quit"
   echo
}

function turnOn {
   command="$commandStart$on$commandEnd"
   eval $command

   echo "Light on command sent..."
   echo
}

function turnOff {
   command="$commandStart$off$commandEnd"
   eval $command

   echo "Light off command sent..."
   echo
}

function whiteMode {
   command="$commandStart$white$commandEnd"
   eval $command

   echo "White mode command sent..."
   echo
}

function setColor {
   properClear
   echo
   echo "Enter a 2 character hex color code from 00 to FF. Or enter Q to return to menu."
   echo

   while :; do
      read -p "Color Code [00-ff]: " code; echo

      if [[ "$code" == "q" || "$code" == "Q" ]]; then displayMenu; return; fi

      decCode=$(echo "ibase=16; $(echo -n $code | tr '[:lower:]' '[:upper:]')" | bc)

      if [ $decCode -ge 0 -a $decCode -le 255 ] 2>/dev/null; then
         code=$(echo -n $code | tr '[:upper:]' '[:lower:]')
         break
      else
         properClear
         echo
         echo "\"$code\" is an invalid selection. The code must be 2 characters in the range of 00 to FF."
         echo
         echo "Enter a 2 character hex color code from 00 to ff. Or enter q to return to menu."
         echo
      fi
   done

   command="$commandStart$colorPrefix$code$commandEnd"
   eval $command

   displayMenu

   echo "Set color to $code command sent..."
   echo
}

function setBrightness {
   properClear
   echo
   echo "Enter a brightness from 1 to 100. Or enter q to return to menu."
   echo

   while :; do
      read -p "Brightness [1-100]: " percent; echo

      if [[ "$percent" == "q" || "$percent" == "Q" ]]; then displayMenu; return; fi

      if [ $percent -ge 1 -a $percent -le 100 ] 2>/dev/null; then
         brightness=$(( percent / 4 ))
         break
      else
         properClear
         echo
         echo "\"$percent\" is an invalid selection. The number must be in the range of 1 to 100."
         echo
         echo "Enter a brightness from 1 to 100. Or enter q to return to menu."
         echo
      fi
   done

   brightness=$(echo "obase=16; $(( brightness + 2 ))" | bc)
   brightness=$(echo -n $brightness | tr '[:upper:]' '[:lower:]')

   if [ ${#brightness} -eq 1 ]; then brightness="0$brightness"; fi

   command="$commandStart$brightnessPrefix$brightness$commandEnd"
   eval $command

   displayMenu

   echo "Set brightness to $percent% command sent..."
   echo
}

function nightMode {
   wakeUpBox
   displayMenu

   command="$commandStart$Group2On$commandEnd"
   eval $command
   sleep 0.1
   eval $command

   sleep 0.2
   command="$commandStart$brightnessPrefix""09$commandEnd"
   eval $command
   sleep 0.1
   eval $command

   sleep 0.2
   command="$commandStart$Group1On$commandEnd"
   eval $command
   sleep 0.1
   eval $command

   sleep 0.2
   command="$commandStart$brightnessPrefix""02$commandEnd"
   eval $command
   sleep 0.1
   eval $command

   echo "Night mode commands sent..."
   echo
}

function groupToggle {
   properClear
   echo
   echo "Select group to turn on/off."
   echo "NOTE: Last group turned on becomes selected light for brightness/color changes."
   echo
   echo "1. Turn group 1 on"
   echo "2. Turn group 1 off"
   echo "3. Turn group 2 on"
   echo "4. Turn group 2 off"
   echo "5. Turn group 3 on"
   echo "6. Turn group 3 off"
   echo "7. Turn group 4 on"
   echo "8. Turn group 4 off"
   echo
   echo "---"
   echo
   echo "Q. Return to menu"
   echo

  while :
  do
    read -sn 1 -p "Select Function [1-8/Q]: " ret; echo

    command="$commandStart"
    msg=""

    case $ret in
        1 ) command+="$Group1On"; msg="Turn group 1 on"; break ;;
        2 ) command+="$Group1Off"; msg="Turn group 1 off"; break ;;
        3 ) command+="$Group2On"; msg="Turn group 2 on"; break ;;
        4 ) command+="$Group2Off"; msg="Turn group 2 off"; break ;;
        5 ) command+="$Group3On"; msg="Turn group 3 on"; break ;;
        6 ) command+="$Group3Off"; msg="Turn group 3 off"; break ;;
        7 ) command+="$Group4On"; msg="Turn group 4 on"; break ;;
        8 ) command+="$Group4Off"; msg="Turn group 4 off"; break ;;
        q|Q) displayMenu; return ;;
        * ) echo -e "\"$ret\" is an invalid selection. Must be N, W, Q or number in the range 1-6.\n" ;;
    esac
   done

   command+="$commandEnd"
   eval $command

   displayMenu

   echo "$msg command sent..."
   echo
}

wakeUpBox
displayMenu

while :
do
   read -sn 1 -p "Select Function [1-6/W/N/Q]: " ret; echo

   displayMenu

   case $ret in
      1 ) turnOn ;;
      2 ) turnOff ;;
      3 ) groupToggle ;;
      4 ) whiteMode ;;
      5 ) setColor ;;
      6 ) setBrightness ;;
      W|w ) wakeUpBox ;;
      N|n ) nightMode ;;
      Q|q ) break ;;
      * ) echo -e "\"$ret\" is an invalid selection. The number must be in the range of 1 to 8.\n" ;;
   esac
done