Ultra-Compact Smart wearable for Real-Time Health & Activity Monitoring

Overview

This project involves the design and development of a high-performance, miniature wearable device (earable) tailored for continuous health tracking and motion analysis. Built around the ESP32-S3 SoC, the device integrates advanced heart rate sensing and inertial measurement units (IMU) into a highly constrained form factor, enabling seamless data synchronization with a mobile application for real-time health insights.

Technical Specifications

• Core Processor: Powered by the ESP32-S3, leveraging its dual-core processing for simultaneous sensor fusion and wireless communication, with dedicated AI acceleration for on-edge activity classification.

• Sensor Suite:  Heart Rate Monitoring: High-precision optical sensors for pulse oximetry and heart rate variability (HRV).

  • IMU (Inertial Measurement Unit): 6-axis motion tracking for step counting, posture detection, and activity recognition.

• Power Management: * Battery: Optimized for 1S Lithium-Polymer (Li-Po) operation.

  • BMS: Integrated Battery Management System for over-voltage/under-voltage protection and efficient load balancing.

  • Charging: Unified USB Type-C interface for high-speed firmware programming and lithium battery recharging.

• Connectivity: Dual-mode Bluetooth (BLE 5.0) and Wi-Fi for low-power data streaming to a dedicated mobile dashboard.

Key Design Highlights

• Earable Form Factor: The PCB is engineered with a specialized footprint to fit within the ergonomic constraints of an ear-mounted enclosure, prioritizing user comfort and signal integrity.

• Energy Efficiency: Implemented deep-sleep cycles and power-gating strategies to maximize battery life for long-term monitoring.

• On-Edge Intelligence: Utilizes the ESP32-S3’s vector instructions to process IMU data locally, reducing latency and transmission power.

Potential Applications

• Post-Operative Recovery: Remote monitoring of vitals for patients at home.

• Sports Analytics: Real-time head-motion and exertion tracking for athletes.

• Occupational Safety: Detection of fatigue or falls in industrial environments.

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• https://docs.google.com/videos/d/1A4ryyTo-pMD1PRpgQV5_fo4BF1PdJilfahukLUu8CLc/edit?usp=sharing