40. Password Protected Locker System
Design a password-protected locker system using a microcontroller. The system has two types of passwords:
- Master PIN (Reset User PIN)
- User PIN (Access Locker)
The system will ask for a User PIN during the first-time setup. Both PINs will be used as described below:
- Enter the User PIN to access the locker.
- Update PIN after verifying the current User PIN.
- Reset the User PIN using the Master PIN.
