Smart sleep/wakeup system

Set time process:
- Use potentiometer to set time
- Use buttons to set time category
- Select choices with buttons based on cycle offset
Set alarm sequence:
- Calculate sleep cycle (90 mins per cycle)
- Set phone to Do Not Disturb mode
- Give user choices of when to wake up (based on time after last cycle):
  - Less than 30 mins: set Wake Up Sequence at 15 mins before last cycle
  - More than 30 mins: set Wake Up Sequence at either 30 mins before alarm time or same as < 30 mins
  - None: set Wake Up Sequence at 30 mins before alarm time
  - No cycle: only set alarm at alarm time
Wake up sequence:
- Then play natural sounds (birds, waves, etc)
- Gradually increase the volume of the sound (30 mins before wake up, 2% each to 60 percent max)
- Then let the alarm go off at 100% volume after natural sounds
Optional:
- Use temperature sensor to read the temperature of the room, then adjust the AC accordingly
- Use ultrasound sensor to detect if the user woke up before the alarm went off, then reset sleep cycle

Hardware