esp‑pulser: ESP32‑S3 + W5500‑based heart‑rate sensor + Ethernet + display system
esp‑pulser is a firmware for ESP32‑S3 MCU that integrates MAX30102 heart‑rate sensor, W5500 Ethernet via SPI, SPI display, and DRV2605L haptic motor
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Components
Hardware components
Espressif - ESP32
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Project description
1. Project Overview & Significance The project consolidates sensor, Ethernet, user interface, feedback (vibration), networking, and firmware update in a single Rust-based embedded firmware. It demonstrates how WIZnet W5500 can be used not just for simple network connectivity but as the backbone of a full-featured IoT device — combining sensors, data streaming, UI, network comms, and remote update. 2. Why was Ethernet used? Despite the ESP32‑S3 having built-in Wi‑Fi, an external Ethernet chip (W5500) was used for the following reasons: Ethernet is commonly used in industrial and medical…
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