PCB Design and Control Systems
E Paper Button Device
Wi-Fi Event Button with E-Paper Display
Overview
Portable Wi-Fi enabled event button device built around ESP32-S3 with a 2.13" e-paper display, 9 physical buttons, custom PCB, low-power battery operation, and 3D-printable enclosure.
Features
ESP32-S3 Wi-Fi for HTTP button-triggered server requests
E-paper display showing last 10 server events
9-button input with GPIO debouncing
Low-power battery with 3D-printable compact enclosure
Tech Stack
Deep Dive
Wireless Communication
ESP32-S3 provides Wi-Fi connectivity to send button-triggered HTTP requests to a backend server and retrieve event data.
Event Display System
Displays the last ten server events on a low-power e-paper display, enabling clear visibility with minimal energy consumption.
Multi-Button Interface
Implements a reliable 9-button input system with optimized GPIO usage and proper debouncing for accurate input detection.
Custom PCB & Enclosure Design
Development of a compact PCB integrating ESP32-S3, display interface, power circuitry, and buttons.
