upload.sh

#!/bin/sh

#removing empty lines if any and save to data2.log
awk 'NF > 0' /tmp/data.log > /tmp/data2.log
#open data2.log
file="/tmp/data2.log"
#go thru file line by line
while IFS= read -r line
do
	#if $line starts with 5 and it is noot the same as previews one (need a bit tweek here)
    if [[ ${line:0:1} == "5" ]]  && [ "$line" != "$STROLD" ] && [ ! -z "${line}"
    	#upload it to ukhasnet
        curl --data "origin=LoGoGa&data=$line" http://ukhas.net/api/upload
        #save it as old line
        STROLD=$line
        #backup it to data.backup.log
        echo $line >> /tmp/data.backup.log
        #sleep 10s and upload next line if exist 
        sleep 10
    fi
#close file
done <"$file"
#remove data.log
rm /tmp/data.log /tmp/data2.log
#check if cut exists                              
if pidof cat >/dev/null; then                     
    echo "Process already running"                
if not run it                                     
else                                              
    cat /dev/ttyUSB0 > /tmp/data.log&             
fi