Heart Rate Monitor

A heart rate monitoring system built with ESP32, Pulse Sensor, OLED display, and a web server for real-time monitoring.

Overview

This project implements a heart rate monitoring system using:

• ESP32: Main microcontroller for processing sensor data and hosting a web server.
• Pulse Sensor: Measures heart rate via optical method.
• OLED Display (SSD1306): Displays IP address and BPM locally.
• Web Server: Provides a web interface to monitor BPM and download data as CSV.

Features

• Real-time heart rate measurement (60–89 BPM range).
• Local display on OLED (128x64, I2C).
• Web interface for remote monitoring with history table.
• Data export in CSV format.
• WiFi AP mode (SSID: HeartRateMonitor, IP: 192.168.4.1).

Hardware Requirements

• ESP32 NodeMCU
• Pulse Sensor V1706
• OLED Display (0.96" I2C, SSD1306)
• Breadboard and jumper wires

Software Requirements

• Arduino IDE
• Libraries: WiFi.h, WebServer.h, Wire.h, Adafruit_GFX.h, Adafruit_SSD1306.h, ArduinoJson.h

Setup Instructions

1. Connect the hardware as per the block diagram in the documentation.
2. Install required libraries in Arduino IDE.
3. Upload src/main.c to the ESP32.
4. Connect to the WiFi AP (SSID: HeartRateMonitor, Password: 12345678).
5. Access the web interface at http://192.168.4.1.