IoT Health Band for Heart Rate & Temperature

Problem statement

Basic vital signs like pulse rate and body temperature are not continuously monitored for most people, limiting early detection of health issues.

Abstract

The IoT health band is a wrist-worn prototype that uses a pulse sensor and temperature sensor connected to an ESP32 or similar microcontroller. It periodically measures heart rate and skin temperature and sends the data via Bluetooth/Wi-Fi to a mobile app or web dashboard, where trends can be monitored.

Components required

• ESP32 or similar low-power microcontroller
• Pulse sensor (photoplethysmography type)
• Temperature sensor (e.g. DS18B20 or analog sensor)
• Li-ion battery and charging module
• Small OLED display (optional)
• Wrist strap / enclosure
• Mobile app / dashboard

Block diagram

Working

The ESP32 reads analog and digital data from the pulse and temperature sensors at regular intervals. It calculates heart rate in beats per minute and logs temperature. The readings are transmitted using Bluetooth or Wi-Fi to a paired phone or cloud server. The app can show graphs and simple alerts when values cross configured ranges.

Applications

• Health monitoring for students and elderly
• Sports/fitness tracking prototypes
• IoT wearable development
• Base for advanced telemedicine systems