Transform all the hex files stored in a folder to pdf

hex_to_pdf.sh

#!/bin/bash
#----------------------------------------------------------------------------
#-- description : Transform all the hex files in the folder to pdf
#----------------------------------------------------------------------------
#-- Script by Ingeborg Muñoz - imunoz@redeshost.cl
#----------------------------------------------------------------------------
T="$(date +%s)" 
SOURCE_FOLDER="/home/some_home/PDFs_Files/"
TYPE="$1/"
EXTENSION=".pdf"

files=`cd $SOURCE_FOLDER$TYPE; ls | grep -E '.hex'`
echo "Checking in ...$SOURCE_FOLDER$TYPE"
    for file in $files; do
        echo "transforming ... $file"
        xxd -p -r $SOURCE_FOLDER$TYPE$file > $SOURCE_FOLDER$TYPE`echo $file | awk -F '.hex' '{print $1}'`$EXTENSION
        rm $SOURCE_FOLDER$TYPE$file

    done
T="$(($(date +%s)-T))"
echo "Time in seconds: ${T}"
echo "process finished!"