// IoT Based Patient Health Monitoring on ESP32 Web Server
#include <WiFi.h>
#include <WebServer.h>
#include <Wire.h>
#include "MAX30100_PulseOximeter.h"
#include <OneWire.h>
#include <DallasTemperature.h>
#include "DHT.h"
#define DHTTYPE DHT22
#define DHTPIN 18
#define DS18B20 5
#define REPORTING_PERIOD_MS 1000
float temperature, humidity, BPM, SpO2, bodytemperature;
/*Put your SSID & Password*/
const char* ssid = "Honor 7X"; // Enter SSID here
const char* password = "15112636"; //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);
Serial.println(F("DHTxx test!"));
dht.begin();
Serial.println("Connecting to ");
Serial.println(ssid);
//connect to your local wi-fi network
WiFi.begin(ssid, password);
//check wi-fi is connected to wi-fi network
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected..!");
Serial.print("Got IP: "); Serial.println(WiFi.localIP());
server.on("/", handle_OnConnect);
server.onNotFound(handle_NotFound);
server.begin();
Serial.println("HTTP server started");
Serial.print("Initializing pulse oximeter..");
if (!pox.begin()) {
Serial.println("FAILED");
for (;;);
} else {
Serial.println("SUCCESS");
pox.setOnBeatDetectedCallback(onBeatDetected);
}
pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
// Register a callback for the beat detection
}
void loop() {
server.handleClient();
pox.update();
sensors.requestTemperatures();
float t = dht.readTemperature();
String Temperature_Value = String(t);
float h = dht.readHumidity();
String Humidity_Value = String(h);
temperature = t;
humidity = h;
BPM = pox.getHeartRate();
SpO2 = pox.getSpO2();
bodytemperature = sensors.getTempCByIndex(0);
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>Health Monitoring System</h1>";
html += "<h3><a href='https://iotprojectsideas.com'>https://theiotprojects.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;
}Loading
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