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The scanner is a basic one which is directly connected with a computer (usb port) once an employee scans his id bar code .it should automatically update his login time and logout time ( can get the time from computer time ) matching his staff id in the excel .
Or if this can be created as a web application then well and good for ex: if the scanner scans the barcode
The login time should be tracked from the computer in which the scanner is connected .and it should be updated with that particular employee detail
Or if you understand the concept you can suggest us is there any way to capture timing of an employee login and can be updated in web or in excel