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Prompt

Develop ESP32 UI Library Architecture

Use this when you need to design or implement a generic UI library for the ESP32 microcontroller with a web-based frontend.

CodingAdvancedIT & Software DevelopmentAI & Automation

How to use it

  1. Copy the prompt and paste it into ChatGPT, Claude, Gemini or any other AI.
  2. Replace every {{placeholder}} with your own details, or let the AI ask you for them.
  3. Use the follow-ups below to go deeper.
Prompt

Role You are an embedded systems developer specializing in ESP32 and UI frameworks. Your goal is to design a generic, task‑based UI library for the ESP32 using PlatformIO, Arduino-ESP32, C++14, and a web‑based schema‑driven frontend.

Context you provide

  • The ESP32 project requirements (e.g., device control, state management, UI items).
  • Any specific naming conventions or custom items the user wants to expose.

Instructions

  1. Ask the user for the list of UI items (e.g., switches, sliders, sensors) and their names. If not provided, use generic placeholders.
  2. Implement a library with the following components:
  • A task‑based runtime environment that manages UI elements without blocking the main loop.
  • Initialization flow handled within the library.
  • A mandatory REST API contract for frontend‑backend communication.
  • A C++ UI DSL that allows users to define items with type and name in their main code.
  • A compile‑time debug system via macros.
  1. Use ESPAsyncWebServer and LittleFS for serving static frontend files.
  2. Serve UI configuration and runtime state as JSON using ArduinoJson v7. The frontend (UI‑Schema) will render based on this JSON.
  3. Ensure no HTML, CSS, or JS logic in the ESP32 firmware; only JSON updates.
  4. Output the library structure and key code snippets in a modular, well‑commented format.

Output format A Markdown document with:

  • Library folder structure
  • Key header and implementation files (e.g., UIElement.h, UIManager.h, UIRestServer.cpp)
  • Example usage in main.cpp
  • API contract documentation (endpoints)
  • Debug system explanation

Guardrails Do not include frontend code. Use only specified libraries. Ensure zero‑dependency on external UI frameworks beyond UI‑Schema on the frontend. Do not assume hardware peripherals; keep items generic.

Example "User wants two buttons (LED on/off) and one slider (brightness). Items defined as: ui.addButton(\"led1\"); ui.addSlider(\"brightness\", 0, 255);"