SunGuard Heat Stress Detector

The SunGard Heat Stress Detector is a portable device created to prevent heatstroke tragedies by providing an early warning.

BeginnerWork in progress125

Things used in this project

Hardware components

Seeed Studio XIAO ESP32S3 Sense

CJMCU-GUVA-S12SD Sunlight Ultraviolet Ray Intensity UV Sensor

Bosch GY-BME280-3.3 Precision Altimeter Atmospheric Pressure Sensor Module

Adafruit RGB Backlight LCD - 16x2

Jumper wires (generic)

Breadboard (generic)

Software apps and online services

Arduino IDE

Story

Introduction

Kerala's scorching summers put outdoor workers like athletes and farmers at serious risk of heatstroke. In 2024, hundreds of heat-related cases were reported, with some even leading to death. The SunGard is our answer to this problem: a smart, pocket-sized device that gives an early warning for heatstroke.This intelligent system uses TinyML to run machine learning models on itself, allowing it to work in real-time. It constantly checks key factors like temperature, humidity, and even a person's heart rate. By spotting dangerous patterns early, SunGard issues an immediate alert before a person feels severe symptoms.With SunGard, we want to offer a simple, tech-driven safety solution to the people who need it most. It's a powerful combination of modern technology and the real need for safety on the ground.

Problem statement

In Kerala and especially in districts like Palakkad, extreme heat has turned into a major public health hazard. During summertime 2024, two people have died from heatstrokes, while quite a few accidents and incidents related to heat came to be reported over the period. Most of these incidents concern laborers, athletes, and vulnerable populations, especially those exposed to the sun for longer periods.The absence of an efficient, real-time alert system is among the chief reasons for these incidents. People are generally unmindful of the combined hazards of high temperature and UV radiation intensity until they begin to feel the condensed symptoms, by which time it is often too late. Hence, this project attempts to fill in the existing gap by providing a simplistic yet effective solution to monitor the environment and give warnings to people about the high chances of heatstroke before it becomes a life-threatening emergency.

Solution overview

A Smart Heat Stress DetectorOur solution is a simple and inexpensive device, lightweight and portable, devised to provide instantaneous warnings about possible heat-stroke conditions in a given area. The project goes further than mere temperature checks and attempts to evaluate heat-related risk more effectively, having demonstrated that such an instrument is indeed required in places such as Kerala.1. Hardware & ComponentsThis project pivots on a powerful yet small microcontroller interfacing with a set of environmental sensors. * Microcontroller: We chose the XIAO ESP32 S3 (or the NodeMCU if one has an ESP8266 version) for its small form, very-low power draw, and embedded Wi-Fi. * Environmental: For ambient air temperature, humidity, and atmospheric pressure, a BME280 module is used. * UV Sensor: Using a GUVA-S12SD sensor will measure UV radiation intensity. Sun exposure is a major risk factor for heatstroke and this thus is a critical sensor to have. * Display: A 16x2 I2C LCD display (or 128x32 OLED) shows sensor data in real-time and the final risk scoring in the device so that the user-turning.

SunGuard Heat Stress Detector Circuit

It is the SunGuard Heat Stress Detector, a portable, ground-based device designed to provide an early warning for heat-related illnesses. The project was created to address the serious health risks faced by outdoor workers and athletes in regions like Kerala, where extreme heat and humidity are a major concern. It goes beyond a simple thermometer by combining multiple environmental factors to give a more accurate and proactive risk assessment.
The device is designed for simplicity. You would place the detector in an outdoor area to get real-time readings. It uses a BME280 sensor to measure ambient temperature and humidity and a GUVA-S12SD sensor to measure UV radiation. The microcontroller processes this data to calculate a comprehensive Heat Stress Index. The results are then displayed instantly on an LCD or OLED screen, giving you a clear risk level from "SAFE" to "DANGER."

Code

SunGuard Heat Stress Detector Code

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Adafruit_BME280.h>

// ==== Pin Definitions ====
// GUVA-S12SD analog pin
#define UV_PIN A0

// ==== UV Index Thresholds ====
#define UV_SAFE       3.0
#define UV_MODERATE   6.0
#define UV_HIGH       8.0

// ==== Objects ====
LiquidCrystal_I2C lcd(0x27, 16, 2); // Change 0x27 if your LCD address differs
Adafruit_BME280 bme;                // I2C mode

void setup() {
  Serial.begin(115200);
  Wire.begin();

  // ==== LCD Setup ====
  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Starting...");

  // ==== BME280 Setup ====
  if (!bme.begin(0x76)) { // Change to 0x77 if needed
    lcd.clear();
    lcd.print("BME280 Error!");
    while (1);
  }

  delay(2000);
  lcd.clear();
}

void loop() {
  // ==== Read BME280 ====
  float pressure = bme.readPressure() / 100.0F; // hPa

  // ==== Read UV Sensor ====
  int uvAnalog = analogRead(UV_PIN);
  float uvVoltage = uvAnalog * (3.3 / 4095.0); // 12-bit ADC
  float uvIndex = uvVoltage * 10.0; // Approximation — adjust with calibration

  // ==== Determine Rating ====
  String rating;
  if (uvIndex <= UV_SAFE) {
    rating = "SAFE";
  } else if (uvIndex <= UV_MODERATE) {
    rating = "MODERATE";
  } else if (uvIndex <= UV_HIGH) {
    rating = "HIGH RISK";
  } else {
    rating = "EXTREME";
  }

  // ==== Display on LCD ====
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("UV:");
  lcd.print(uvIndex, 1);
  lcd.print(" P:");
  lcd.print(pressure, 0);

  lcd.setCursor(0, 1);
  lcd.print(rating);

  // ==== Debug Output ====
  Serial.print("Pressure: "); Serial.print(pressure); Serial.println(" hPa");
  Serial.print("UV Index: "); Serial.println(uvIndex);
  Serial.print("Rating: "); Serial.println(rating);

  delay(1000); // Update every second
}

Credits

Muhammed Shibin P

1 project • 3 followers

Muhammad shaheem

1 project • 3 followers

embedded systems, and IoT development. ESP32, sensors, and PCB design, with a growing focus on AI-powered devices

SunGuard Heat Stress Detector