Initially, user needs to press switch 1 for enrolling the fingerprint using R305 module which gets enrolled if the same finger is placed two times on R305 sensor. It will store the fingerprint in the R305 module database.

After enrollment, user needs to press switch 2 for matching and attendance purpose. As soon as valid finger is identified, SQL Database gets updated.

Wifi Hotspot is created using Mobile which provides private IP to both NodeMCU and Laptop. NodeMCU is acting like server and Laptop is created as client(local host) through XAMPP. Database consists of a table named as “sensor” which will contain columns like ID and Time at which fingerprint status is updated.