Bash script to check if usb device is connect via adb

check.sh

!/bin/bash

#IP='1216.58.205.195'

function pingDevice {
  #ping -c1 -t300 $IP 2>/dev/null 1>/dev/null

  #if [ "$?" = 0 ]
  if adb get-state 1>/dev/null 2>&1
  then
    echo "Host found"
  else
    echo "Host not found"
  fi
}

while [ 0 = 0 ]; do
   pingDevice
   sleep 5
done;

Maybe better add shebang line like:

#!/usr/bin/env bash