Android QR code reader app to do the following on scanning a specific QR code:
1. Intepret the QR code.
2. Query a cloud/online database, preferably Firebase, and confirm the QR details read in (1).
3. Update a cloud/online database, preferably Firebase, with;
a)Timestamp when the scan was made.
b)GPS location of where the scan was made (predefined positions can be used).
4. Periodically check the database for a specific set of information and display constantly on screen.