IoT-Driven Advanced Medical Smart Watch

Abstract

The rapid development of wearable technology and the Internet of Things (IoT) has significantly improved healthcare monitoring systems. The proposed IoT-Driven Advanced Medical Smart Watch is designed to continuously monitor vital health parameters in real time, including heart rate (BPM), body temperature, and ambient humidity. An ESP8266 NodeMCU microcontroller integrates a DHT-11 temperature/humidity sensor, a photoplethysmography-based pulse sensor, a 0.96-inch OLED display, and a push-button emergency alert system. Collected data is transmitted via Wi-Fi to a cloud platform or mobile application, enabling remote health monitoring and timely emergency notifications. The system is compact, wearable, low-cost (approximately ₹1,425), and battery-powered with over 4 hours of continuous operation. Results confirm BPM accuracy of ±2 BPM, temperature accuracy of ±0.9°C, and emergency alert latency below 3 seconds. This system is especially useful for elderly patients, chronic disease monitoring, and preventive healthcare.