Arduino will receive several request
1 root - This will display root html which let user request either 3 input which is
2 add - This will add attendance record for check in 
3 stop - This will add attendance record for check out 
4 eStop (Emergency Early Leave) - This will add attendance record for check out, but additional note (emergency)

This is basic instruction request, however also will be additional hidden instruction which only admin can request
The hidden instruction request is important however they will be use less frequent than the basic one

5 enroll - admin can enroll new fingerprint for new staff