Lab Tasks: Controlling a Garage Door

Uncle Roger is interested in re$-$automating his garage door, he wants to open$/$close the garage door by adding another push button switch inside his home with extra functionalifies. He checked with a local technician to make the requested update for him, but he was not happy with how much the technician would charge him. Uncle Roger decided to use his Raspberry Pi kit to design and implement a

prototype for his system.

Uncle Roger wants the new system to have the following features:

$$ A push button to open$/$close a garage door.

$$ The garage door will be monitored using two LEDs; a green LED to indicate a closed door and a red LED to indicate an open door.

$$ A buzzer is used to indicate that the door is being opened$/$closed$.$ The buzzer beeps for $5$ seconds. $($a~suming that it takes $5$ seconds to fully open$/$close the door$)$

$$ After each door action $($open or close$),$ the system waits $10$ seconds to be ready for the next action. $($i$.$e$.,$ to prevent reopening the door while being closed or vice versa$)$

$$ An Email notification is sent when the door is opened. No notification is sent when the door is closed. Your task is to help Uncle Roger by designing and implementing the above system. Creativity is encouraged and highly appreciated.

Questions: $($to be answered in your submitted report$)$

$$ How would you improve the usability of the implemented system?

$$ How would you improve the security of the implemented system? What threats and vulnerabilities need to be mitigated in the current design? Explain and justify your answer.

$$ Uncle Roger wants to add the following safety features:

$-$If a moving object is detected under the door while being closed, the door should stop immediately.

$-$An indicator to ensure that door is really closed and not blocked by an object.

Explain how you would implement the above safety features using components from your loT kit or any other sensors Uncle Roger can buy.