IoT Patient Health Monitoring System Project Using ESP32

IoT patient health monitoring system using ESP32 aims at reducing the tasks of doctors, nurses, and health professionals to monitor and track various health parameters of patients in real timeIn this tutorial we’re going to build IOT Based Patient Health Monitoring System Project Using ESP32.

The system uses an ESP32 board, which integrates Wi-Fi and Bluetooth connectivity, making it a great solution for IoT applications. this system is real-time Data of a patient’s health sent to the Webserver using Internet connectivity.

The purpose of this project is to collect real-time data and send patients’ health data to a Web server, where the real-time health status of the patient is.

Thank You, PCBWay:

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Required Materials

ESP32 board
MAX30100 Sensor
DS18b20 Sensor
DHT11 sensor
Jumper wires
4.7ohm resistor
Breadboard

The system contains sensors such pulse oximeter, DHT11 humidity sensor, and DS18B20 temperature sensor to measure the patient’s heart rate, environmental temperature, and humidity levels.

ESP32 board with built-in Wi-Fi capabilities, operates as the main controller to collect, process, and transmit sensor data. This data can be shown accessed remotely through a mobile or web application.

MAX30100 Heart Rate Pulse Oximeter Sensor

The MAX30100 is an extremely popular sensor module used for heart rate monitoring and pulse oximetry measurements. It integrates two sensors, an infrared (IR) LED and a photodetector, to measure the absorption of red and infrared light by the blood vessels in the finger or other body parts. This allows for the calculation of heart rate and oxygen saturation (SpO2) levels.

DS18B20 Temperature Sensor

The DS18B20 temperature sensor is a digital temperature sensor that measures the temperature of its surrounding environment. It is commonly used in various applications where accurate and reliable temperature measurements are necessary and a simple interface.

Through its special 1-Wire interface, DS18B20 allows multiple temperature sensors to be connected to a single pin on the microcontroller.

The DS18B20 is a small temperature sensor This is a pre-wired and waterproof version of the DS18B20 sensor, it works great with any microcontroller using a single digital pin,

DHT11 Temperature and Humidity Sensor Module

DHT11 is a basic, low-cost digital temperature and humidity sensor. the module provides accurate measurements of ambient temperature and relative humidity. DHT11 sensor comes with NTC to measure temperature and an 8-bit microcontroller to output the values of temperature and humidity as serial data.

Wiring Diagram – ESP32 IoT Patient Health Monitoring System

The wiring diagram is very straightforward. You have to All sensor pins with ESP32 pins as per the schematic diagram. The schematic diagram is shown below.

Pin Mapping

MAX30100	ESP32
SDA	GPIO21
SCL	GPIO22
INT	GPIO19
Vcc	3.3V
GND	GND
DS18B20	ESP32
Vcc	3.3V
GND	GND
Signal	GPIO5
DHT22	ESP32
VCC	3.3V
GND	GND
Signal	GPIO18

Software and Libraries

1. Preparing Arduino IDE for ESP32 Board

To upload the Arduino code to the ESP32 board, you have to follow this Getting Started With ESP32 – Setting up Arduino IDE for ESP32

2. Install the Libraries

Now you have to import the all libraries onto your Arduino IDE.

Download following libraries

Source Code – ESP32 IoT Patient Health Monitoring System

After installing all the necessary libraries, copy the code provided for the IoT Patient Health Monitoring System project using ESP32.

#include <WiFi.h>
#include <WebServer.h>
#include <Wire.h>
#include "MAX30100_PulseOximeter.h"
#include <OneWire.h>
#include <DallasTemperature.h>
#include "DHT.h" 

#define DHTTYPE DHT11 
#define DHTPIN 18
#define DS18B20 5
#define REPORTING_PERIOD_MS     1000
 
float temperature, humidity, BPM, SpO2, bodytemperature;
 

const char* ssid = "ESP Repeater";  // Enter SSID here
const char* password = "antivirus";  //Enter Password here
 
DHT dht(DHTPIN, DHTTYPE);; 
PulseOximeter pox;
uint32_t tsLastReport = 0;
OneWire oneWire(DS18B20);
DallasTemperature sensors(&oneWire);
 
 
WebServer server(80);             
 
void onBeatDetected()
{
  Serial.println("Beat!");
}
 
void setup() {
  Serial.begin(115200);
  pinMode(19, OUTPUT);
  delay(100);   
  
  // Initialize DHT sensor
  Serial.println(F("DHTxx test!"));
  dht.begin();
  
  Serial.println("Connecting to Wi-Fi");
  Serial.println(ssid);
 
  // Connect to Wi-Fi network
  WiFi.begin(ssid, password);
 
  // Wait for Wi-Fi connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected!");
  Serial.print("Got IP: ");
  Serial.println(WiFi.localIP());
 
  // Set up HTTP server routes
  server.on("/", handle_OnConnect);
  server.onNotFound(handle_NotFound);
 
  // Start HTTP server
  server.begin();
  Serial.println("HTTP server started");
 
  // Initialize pulse oximeter
  Serial.print("Initializing pulse oximeter..");
 
  if (!pox.begin()) {
    Serial.println("FAILED");
    for (;;);
  } else {
    Serial.println("SUCCESS");
    pox.setOnBeatDetectedCallback(onBeatDetected);
  }
 
  // Set LED current for pulse oximeter
  pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
}
 
void loop() {
  // Handle client requests
  server.handleClient();
  
  // Update pulse oximeter
  pox.update();
  
  // Request temperature readings from sensors
  sensors.requestTemperatures();
  
  // Read temperature and humidity from DHT sensor
  float t = dht.readTemperature();
  String Temperature_Value = String(t);
  float h = dht.readHumidity();
  String Humidity_Value = String(h);
  
  // Store sensor readings
  temperature = t;
  humidity = h;
  BPM = pox.getHeartRate();
  SpO2 = pox.getSpO2();
  bodytemperature = sensors.getTempCByIndex(0);
 
  // Send sensor data at a fixed reporting period
  if (millis() - tsLastReport > REPORTING_PERIOD_MS) {
    Serial.print("Room Temperature: ");
    Serial.print(t);
    Serial.println("°C");

    Serial.print("Room Humidity: ");
    Serial.print(h);
    Serial.println("%");

    Serial.print("BPM: ");
    Serial.println(BPM);

    Serial.print("SpO2: ");
    Serial.print(SpO2);
    Serial.println("%");

    Serial.print("Body Temperature: ");
    Serial.print(bodytemperature);
    Serial.println("°C");

    Serial.println("*********************************");
    Serial.println();
 
    tsLastReport = millis();
  }
  
}
 
void handle_OnConnect() {
  
  server.send(200, "text/html", SendHTML(temperature, humidity, BPM, SpO2, bodytemperature)); 
}
 
void handle_NotFound(){
  server.send(404, "text/plain", "Not found");
}
 
  String SendHTML(float temperature, float humidity, float BPM, float SpO2, float bodytemperature) {
  String html = "<!DOCTYPE html>";
html += "<html>";
html += "<head>";
html += "<title>Patient Health Monitoring</title>";
html += "<meta name='viewport' content='width=device-width, initial-scale=1.0'>";
html += "<link rel='stylesheet' href='https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.7.2/css/all.min.css'>";
html += "<link rel='stylesheet' type='text/css' href='styles.css'>";
html += "<style>";
html += "body { background-color: #fff; font-family: sans-serif; color: #333333; font: 14px Helvetica, sans-serif box-sizing: border-box;}";
html += "#page { margin: 20px; background-color: #fff;}";
html += ".container { height: inherit; padding-bottom: 20px;}";
html += ".header { padding: 20px;}";
html += ".header h1 { padding-bottom: 0.3em; color: #008080; font-size: 45px; font-weight: bold; font-family: Garmond, 'sans-serif'; text-align: center;}";
html += "h2 { padding-bottom: 0.2em; border-bottom: 1px solid #eee; margin: 2px; text-align: left;}";
html += ".header h3 { font-weight: bold; font-family: Arial, 'sans-serif'; font-size: 17px; color: #b6b6b6; text-align: center;}";
html += ".box-full { padding: 20px; border 1px solid #ddd; border-radius: 1em 1em 1em 1em; box-shadow: 1px 7px 7px 1px rgba(0,0,0,0.4); background: #fff; margin: 20px; width: 300px;}";
html += "@media (max-width: 494px) { #page { width: inherit; margin: 5px auto; } #content { padding: 1px;} .box-full { margin: 8px 8px 12px 8px; padding: 10px; width: inherit;; float: none; } }";
html += "@media (min-width: 494px) and (max-width: 980px) { #page { width: 465px; margin 0 auto; } .box-full { width: 380px; } }";
html += "@media (min-width: 980px) { #page { width: 930px; margin: auto; } }";
html += ".sensor { margin: 12px 0px; font-size: 2.5rem;}";
html += ".sensor-labels { font-size: 1rem; vertical-align: middle; padding-bottom: 15px;}";
html += ".units { font-size: 1.2rem;}";
html += "hr { height: 1px; color: #eee; background-color: #eee; border: none;}";
html += "</style>";

//Ajax Code Start
  html += "<script>\n";
  html += "setInterval(loadDoc,1000);\n";
  html += "function loadDoc() {\n";
  html += "var xhttp = new XMLHttpRequest();\n";
  html += "xhttp.onreadystatechange = function() {\n";
  html += "if (this.readyState == 4 && this.status == 200) {\n";
  html += "document.body.innerHTML =this.responseText}\n";
  html += "};\n";
  html += "xhttp.open(\"GET\", \"/\", true);\n";
  html += "xhttp.send();\n";
  html += "}\n";
  html += "</script>\n";
  //Ajax Code END
  
html += "</head>";
html += "<body>";
html += "<div id='page'>";
html += "<div class='header'>";
html += "<h1>Pateint Health Monitoring System</h1>";
html += "<h3><a href='https://diyprojectslab.com'>https://diyprojectslab.com</a></h3>";
html += "</div>";
html += "<div id='content' align='center'>";
html += "<div class='box-full' align='left'>";
html += "<h2>Sensors Readings</h2>";
html += "<div class='sensors-container'>";

//For Temperature
html += "<div class='sensors'>";
html += "<p class='sensor'>";
html += "<i class='fas fa-thermometer-half' style='color:#0275d8'></i>";
html += "<span class='sensor-labels'> Room Temperature </span>";
html += (int)temperature;
html += "<sup class='units'>°C</sup>";
html += "</p>";
html += "<hr>";
html += "</div>";

//For Humidity
html += "<div class='sensors'>";
html += "<p class='sensor'>";
html += "<i class='fas fa-tint' style='color:#5bc0de'></i>";
html += "<span class='sensor-labels'> Room Humidity </span>";
html += (int)humidity;
html += "<sup class='units'>%</sup>";
html += "</p>";
html += "<hr>";

//For Heart Rate
html += "<p class='sensor'>";
html += "<i class='fas fa-heartbeat' style='color:#cc3300'></i>";
html += "<span class='sensor-labels'> Heart Rate </span>";
html += (int)BPM;
html += "<sup class='units'>BPM</sup>";
html += "</p>";
html += "<hr>";

//For Sp02
html += "<p class='sensor'>";
html += "<i class='fas fa-burn' style='color:#f7347a'></i>";
html += "<span class='sensor-labels'> Sp02 </span>";
html += (int)SpO2;
html += "<sup class='units'>%</sup>";
html += "</p>";
html += "<hr>";

//For Body Temperature
html += "<p class='sensor'>";
html += "<i class='fas fa-thermometer-full' style='color:#d9534f'></i>";
html += "<span class='sensor-labels'> Body Temperature </span>";
html += (int)bodytemperature;
html += "<sup class='units'>°C</sup>";
html += "</p>";
html += "</div>";
html += "</div>";
html += "</div>";
html += "</div>";
html += "</div>";
html += "</body>";
html += "</html>";
return html;
}

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#include <WiFi.h>

#include <WebServer.h>

#include <Wire.h>

#include "MAX30100_PulseOximeter.h"

#include <OneWire.h>

#include <DallasTemperature.h>

#include "DHT.h"

#define DHTTYPE DHT11

#define DHTPIN 18

#define DS18B20 5

#define REPORTING_PERIOD_MS 1000

float temperature, humidity, BPM, SpO2, bodytemperature;

const char* ssid = "ESP Repeater"; // Enter SSID here

const char* password = "antivirus"; //Enter Password here

DHT dht(DHTPIN, DHTTYPE);;

PulseOximeter pox;

uint32_t tsLastReport = 0;

OneWire oneWire(DS18B20);

DallasTemperature sensors(&oneWire);

WebServer server(80);

void onBeatDetected()

{

Serial.println("Beat!");

}

void setup() {

Serial.begin(115200);

pinMode(19, OUTPUT);

delay(100);

// Initialize DHT sensor

Serial.println(F("DHTxx test!"));

dht.begin();

Serial.println("Connecting to Wi-Fi");

Serial.println(ssid);

// Connect to Wi-Fi network

WiFi.begin(ssid, password);

// Wait for Wi-Fi connection

while (WiFi.status() != WL_CONNECTED) {

delay(1000);

Serial.print(".");

}

Serial.println("");

Serial.println("WiFi connected!");

Serial.print("Got IP: ");

Serial.println(WiFi.localIP());

// Set up HTTP server routes

server.on("/", handle_OnConnect);

server.onNotFound(handle_NotFound);

// Start HTTP server

server.begin();

Serial.println("HTTP server started");

// Initialize pulse oximeter

Serial.print("Initializing pulse oximeter..");

if (!pox.begin()) {

Serial.println("FAILED");

for (;;);

} else {

Serial.println("SUCCESS");

pox.setOnBeatDetectedCallback(onBeatDetected);

}

// Set LED current for pulse oximeter

pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);

}

void loop() {

// Handle client requests

server.handleClient();

// Update pulse oximeter

pox.update();

// Request temperature readings from sensors

sensors.requestTemperatures();

// Read temperature and humidity from DHT sensor

float t = dht.readTemperature();

String Temperature_Value = String(t);

float h = dht.readHumidity();

String Humidity_Value = String(h);

// Store sensor readings

temperature = t;

humidity = h;

BPM = pox.getHeartRate();

SpO2 = pox.getSpO2();

bodytemperature = sensors.getTempCByIndex(0);

// Send sensor data at a fixed reporting period

if (millis() - tsLastReport > REPORTING_PERIOD_MS) {

Serial.print("Room Temperature: ");

Serial.print(t);

Serial.println("°C");

Serial.print("Room Humidity: ");

Serial.print(h);

Serial.println("%");

Serial.print("BPM: ");

Serial.println(BPM);

Serial.print("SpO2: ");

Serial.print(SpO2);

Serial.println("%");

Serial.print("Body Temperature: ");

Serial.print(bodytemperature);

Serial.println("°C");

Serial.println("*********************************");

Serial.println();

tsLastReport = millis();

}

void handle_OnConnect() {

server.send(200, "text/html", SendHTML(temperature, humidity, BPM, SpO2, bodytemperature));

}

void handle_NotFound(){

server.send(404, "text/plain", "Not found");

}

String SendHTML(float temperature, float humidity, float BPM, float SpO2, float bodytemperature) {

String html = "<!DOCTYPE html>";

html += "<html>";

html += "<head>";

html += "<title>Patient Health Monitoring</title>";

html += "<meta name='viewport' content='width=device-width, initial-scale=1.0'>";

html += "<link rel='stylesheet' href='https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.7.2/css/all.min.css'>";

html += "<link rel='stylesheet' type='text/css' href='styles.css'>";

html += "<style>";

html += "body { background-color: #fff; font-family: sans-serif; color: #333333; font: 14px Helvetica, sans-serif box-sizing: border-box;}";

html += "#page { margin: 20px; background-color: #fff;}";

html += ".container { height: inherit; padding-bottom: 20px;}";

html += ".header { padding: 20px;}";

html += ".header h1 { padding-bottom: 0.3em; color: #008080; font-size: 45px; font-weight: bold; font-family: Garmond, 'sans-serif'; text-align: center;}";

html += "h2 { padding-bottom: 0.2em; border-bottom: 1px solid #eee; margin: 2px; text-align: left;}";

html += ".header h3 { font-weight: bold; font-family: Arial, 'sans-serif'; font-size: 17px; color: #b6b6b6; text-align: center;}";

html += ".box-full { padding: 20px; border 1px solid #ddd; border-radius: 1em 1em 1em 1em; box-shadow: 1px 7px 7px 1px rgba(0,0,0,0.4); background: #fff; margin: 20px; width: 300px;}";

html += "@media (max-width: 494px) { #page { width: inherit; margin: 5px auto; } #content { padding: 1px;} .box-full { margin: 8px 8px 12px 8px; padding: 10px; width: inherit;; float: none; } }";

html += "@media (min-width: 494px) and (max-width: 980px) { #page { width: 465px; margin 0 auto; } .box-full { width: 380px; } }";

html += "@media (min-width: 980px) { #page { width: 930px; margin: auto; } }";

html += ".sensor { margin: 12px 0px; font-size: 2.5rem;}";

html += ".sensor-labels { font-size: 1rem; vertical-align: middle; padding-bottom: 15px;}";

html += ".units { font-size: 1.2rem;}";

html += "hr { height: 1px; color: #eee; background-color: #eee; border: none;}";

html += "</style>";

//Ajax Code Start

html += "<script>\n";

html += "setInterval(loadDoc,1000);\n";

html += "function loadDoc() {\n";

html += "var xhttp = new XMLHttpRequest();\n";

html += "xhttp.onreadystatechange = function() {\n";

html += "if (this.readyState == 4 && this.status == 200) {\n";

html += "document.body.innerHTML =this.responseText}\n";

html += "};\n";

html += "xhttp.open(\"GET\", \"/\", true);\n";

html += "xhttp.send();\n";

html += "}\n";

html += "</script>\n";

//Ajax Code END

html += "</head>";

html += "<body>";

html += "<div id='page'>";

html += "<div class='header'>";

html += "<h1>Pateint Health Monitoring System</h1>";

html += "<h3><a href='https://diyprojectslab.com'>https://diyprojectslab.com</a></h3>";

html += "</div>";

html += "<div id='content' align='center'>";

html += "<div class='box-full' align='left'>";

html += "<h2>Sensors Readings</h2>";

html += "<div class='sensors-container'>";

//For Temperature

html += "<div class='sensors'>";

html += "<p class='sensor'>";

html += "<i class='fas fa-thermometer-half' style='color:#0275d8'></i>";

html += "<span class='sensor-labels'> Room Temperature </span>";

html += (int)temperature;

html += "<sup class='units'>°C</sup>";

html += "</p>";

html += "<hr>";

html += "</div>";

//For Humidity

html += "<div class='sensors'>";

html += "<p class='sensor'>";

html += "<i class='fas fa-tint' style='color:#5bc0de'></i>";

html += "<span class='sensor-labels'> Room Humidity </span>";

html += (int)humidity;

html += "<sup class='units'>%</sup>";

html += "</p>";

html += "<hr>";

//For Heart Rate

html += "<p class='sensor'>";

html += "<i class='fas fa-heartbeat' style='color:#cc3300'></i>";

html += "<span class='sensor-labels'> Heart Rate </span>";

html += (int)BPM;

html += "<sup class='units'>BPM</sup>";

html += "</p>";

html += "<hr>";

//For Sp02

html += "<p class='sensor'>";

html += "<i class='fas fa-burn' style='color:#f7347a'></i>";

html += "<span class='sensor-labels'> Sp02 </span>";

html += (int)SpO2;

html += "<sup class='units'>%</sup>";

html += "</p>";

html += "<hr>";

//For Body Temperature

html += "<p class='sensor'>";

html += "<i class='fas fa-thermometer-full' style='color:#d9534f'></i>";

html += "<span class='sensor-labels'> Body Temperature </span>";

html += (int)bodytemperature;

html += "<sup class='units'>°C</sup>";

html += "</p>";

html += "</div>";

html += "</body>";

html += "</html>";

return html;

}

Enter the auth code from step 1, SSID, and the password of your router.

const char* ssid = "ESP Repeater";  // Enter SSID here
const char* password = "antivirus";  //Enter Password here

1 2	const char* ssid = "ESP Repeater"; // Enter SSID here const char* password = "antivirus"; //Enter Password here

Then upload the code.

Af͏t͏e͏r ͏u͏p͏l͏o͏a͏d͏i͏n͏g ͏t͏h͏e ͏c͏o͏d͏e successfully, the serial monitor will display the ESP32’s attempts to connect to the Wi-Fi network and its IP address when the connection is established. ͏

Working

Now copy that IP address and open that IP address in any mobile or laptop browser.

Open a web browser (such as Chrome, Firefox, or Safari).
Paste the copied IP address into the address bar of the web browser.
Press Enter to navigate to the IP address.

After you access the IP address in the web browser, you can view the information on room temperature, room humidity, heart rate, blood oxygen level, and body temperature, as you have implemented in the code.

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IoT Patient Health Monitoring System Project Using ESP32 | Real-time Monitoring & Analysis

Required Materials

MAX30100 Heart Rate Pulse Oximeter Sensor

DS18B20 Temperature Sensor

DHT11 Temperature and Humidity Sensor Module

Wiring Diagram – ESP32 IoT Patient Health Monitoring System

Software and Libraries

Download following libraries

Source Code – ESP32 IoT Patient Health Monitoring System

Working

Related Posts

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2 Comments

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