IoT Patient Health Monitoring System

 

Project Overview

This system continuously monitors a patient’s heart rate, body temperature, and blood oxygen level (SpO₂) and sends real-time data to a mobile app / web dashboard using IoT. Doctors or caretakers can monitor the patient remotely and receive alerts if values go abnormal.

🎯 Features

• ✅ Real-time monitoring

• ✅ Remote access via Internet

• ✅ Emergency alert system

• ✅ Low cost & scalable

• ✅ Suitable for hospitals & home care

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🧠 Parameters Monitored

Parameter	Sensor
Heart Rate	MAX30100 / MAX30102
SpO₂	MAX30100 / MAX30102
Body Temperature	LM35 / DS18B20
Room Temp & Humidity (Optional)	DHT11

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🧩 Components Required

• ESP8266 NodeMCU (Wi-Fi)

• MAX30100 / MAX30102 Pulse Oximeter

• LM35 Temperature Sensor

• OLED Display (0.96” I2C) (optional)

• Buzzer (alert)

• Breadboard & Jumper Wires

• USB Cable

• Power Supply

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🔌 Circuit Connections

MAX30100 → ESP8266

MAX30100	ESP8266
VIN	3.3V
GND	GND
SDA	D2
SCL	D1

LM35 → ESP8266

LM35	ESP8266
VCC	3.3V
OUT	A0
GND	GND

Buzzer

• • → D5

• − → GND

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☁️ IoT Platform

You can use:

• Blynk

• ThingSpeak

• Firebase

• MQTT Dashboard

(Example below uses Blynk)

📱 Mobile App Output

• Live Heart Rate

• Live SpO₂ %

• Body Temperature

• Emergency Notification

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🧾 Arduino Code (ESP8266 + MAX30100)

#include <Wire.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include "MAX30100_PulseOximeter.h"

#define BLYNK_PRINT Serial
#define BUZZER D5

char auth[] = "Your_Blynk_Auth_Token";
char ssid[] = "WiFi_Name";
char pass[] = "WiFi_Password";

PulseOximeter pox;
uint32_t tsLastReport = 0;

void setup() {
  Serial.begin(9600);
  pinMode(BUZZER, OUTPUT);
  Blynk.begin(auth, ssid, pass);

  if (!pox.begin()) {
    Serial.println("MAX30100 Failed");
    for(;;);
  }
}

void loop() {
  Blynk.run();
  pox.update();

  if (millis() - tsLastReport > 1000) {
    int heartRate = pox.getHeartRate();
    int spo2 = pox.getSpO2();

    Blynk.virtualWrite(V1, heartRate);
    Blynk.virtualWrite(V2, spo2);

    if (heartRate < 50 || spo2 < 90) {
      digitalWrite(BUZZER, HIGH);
      Blynk.notify("⚠ Patient Health Alert!");
    } else {
      digitalWrite(BUZZER, LOW);
    }

    tsLastReport = millis();
  }
}

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📊 Output Example

• Heart Rate: 72 BPM

• SpO₂: 98%

• Temperature: 36.8°C

• Alert on abnormal values 🚨

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📘 Applications

• Hospitals

• Old-age homes

• Home patient care

• COVID & ICU monitoring

• Rural healthcare