Portable Smart Pulse Oximeter and Heartbeat Monitoring System Using Embedded Sensor Analytics

This project uses an ESP32 microcontroller and MAX30100 pulse oximeter sensor to continuously monitor Heart Rate (BPM) and Blood Oxygen Saturation (SpO₂). The measured values are displayed in real time on an OLED display. A push button is used to start or control measurements, while a buzzer provides an alert whenever abnormal heart rate or oxygen levels are detected. The system is powered by a 3.7V lithium battery, making it portable and suitable for personal healthcare monitoring, elderly care, and biomedical applications.