List of hardwares that would be used:
4x door access controller EM lock with facial recognition camera
4x QR code scanner
1x 24port gigabit switch
1x windows server to link up by cables and network switch to all the above mentioned items (not connected to internet)
1. User will scan QR code which is pasted on the door frame
2. After scanning, windows server will generate an 'Access Granted QR code' and send it to the user's mobile phone.
3.1 user will open the QR code on his mobile phone and scan it at the QR code scanner outside the door.
3.2 user will then scan his face at the door facial recognition camera
4. door is unlocked and user can enter
Do let me know if you are able to fulfil this task so we can discuss more details in depth thanks.