Development of a Stress Monitoring System Architecture for Heart Rate Measurement

Tyulepberdinova G. Kunelbayev M. Amirkhanova G. Tokhtassyn M. Amirkhanov A.
8 December 2025 Dr D. Pylarinos

Engineering, Technology and Applied Science Research
2025 #15 Issue 6 29551 - 29565 pp.

This paper presents the development and experimental validation of a wearable system for stress and cardiovascular monitoring that integrates three sensors: a Photo-Plethysmography (PPG) sensor, a Galvanic Skin Response (GSR) sensor, and a DS18B20 digital temperature sensor. The ESP32 microcontroller serves as the core of the system, performing signal filtering using the Exponential Moving Average (EMA) method and lightweight on-device classification with machine learning models (CNN, LSTM). Wireless communication is enabled using Wi-Fi and Bluetooth Low-Energy (BLE), allowing remote monitoring and cloud-based analytics. The system was tested on 10 volunteers under various physical and emotional scenarios, including sitting, walking, exercising, yoga, cycling, and watching movies. The results demonstrated significant physiological variations: the heart rate increased from 75 bpm at rest to 125 bpm during stress episodes, the skin conductance increased by up to 25%, and body temperature changed by 2-3°C depending on activity level. The embedded ML models achieved a stress classification accuracy of 92% (F1 = 0.90). The prototype also showed high energy efficiency, operating for more than 12 hours on a single charge. The proposed architecture offers promising applications for personalized health monitoring, stress management, and integration with medical information systems (FHIR, HL7). Licensed under a CC-BY 4.0 license | Copyright (c) by the authors | DOI: https://doi.org/10.48084/etasr.13150

cardiovascular indicators , IoT , machine learning , stress monitoring , wearable devices , wireless data transmission

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Al-Farabi Kazakh National University, Almaty, Kazakhstan
Al-Farabi Kazakh National University, Almaty, Kazakhstan

Al-Farabi Kazakh National University
Al-Farabi Kazakh National University

10 лет помогаем публиковать статьи Международный издатель

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