Final project

The first idea came to my mind for final project is developing a sensing system that uses an ultrasonic sensor to measure distance based on the time-of-flight (ToF) principle, where the travel time of transmitance ultrasound wave and echo pulse are used to calculate the distance to an object. In addition to distance, I might try to work on analyzing pulse echo response behavior—to setimate basic material properties of the object, specifically whether the surface is soft or hard.

Here is the basic sketch of the ides is:

Multisensing portable sleep monitor

a small, wearable/attachable device that detects snoring on-device and correlates snore events with physical sleep positions.

Optionally add SpO₂/HR, temperature or motion sensors to enrich correlation and investigation.

for the device shape I haven't decided yet. It should be small light but not just a simple box The challenges for the portable battery should be challenge

For the electronic part I'm thinking of using ultralow power microcontroller having bluethoth or ...

Sensors

Airflow or pressure sensors for breathing pattern detection

Sound or vibration sensors for snoring intensity

CO₂ or VOC sensors for room‑air quality

PPG modules for heart rate and SpO₂

High‑resolution IMUs for body‑position tracking

What this means for your design If apnea is important, I’d structure the core feature set like this:

Must have:

I²S microphone (snoring + silence detection)

SpO₂ + heart rate

IMU (position/motion)

Temperature & humidity

ESP32‑S3 + Wi‑Fi + display

Nice to have (modular / experimental):

ECG

Extra airflow/respiratory effort sensor

Microcontroller: - ESP32‑S3 DevKit - XIAO ESP32‑S3