Some improvements that could be done to this project are as follows:
- Setting the automatic door closing interval directly from the app instead of changing the Arduino code.
- Turning the garage lights on and off on entering and exiting the garage.
- Opening the garage door from the inside by using the noise generated by the car engine instead of manually. This requires listening to the motor noise from the iOS device and comparing it with a pre-recorded noise of the motor. This is done to avoid a situation where a noise inside or outside the garage unexpectedly opens the door. For signal comparison, you can use an operation called the correlation of two signals (take a look at the Accelerate framework that is available in iOS), but ...