PROOF OF CONCEPT: PC metrics displayed on an ESP32 Cheap Yellow Display (CYD).

This repository contains a proof-of-concept system where a PC acts as a server and an ESP32 with a CYD display acts as a client, receiving and displaying system metrics.

This is intentionally experimental, incomplete, and not production-ready.

• A PC-side metrics server (written in Go)
• An ESP32 client (CYD + LVGL) that:
  • Connects to the PC
  • Receives metrics formatted as JSON
  • Displays them on a small TFT display

The ESP32 does not parse arbitrary JSON schemas — it consumes a known, fixed JSON format defined by the server.

• Not a finished product
• Not a reusable library
• Not optimized
• Not hardened for security
• Not guaranteed to be stable

This repo exists as proof-of-existence and experimentation.

PC (Server)
  └─ Collects system metrics
  └─ Sends JSON over network

ESP32 (Client)
  └─ Receives JSON
  └─ Displays values via LVGL

• An ESP32-2432S028 (Cheap Yellow Display)
• A computer

• PC Server: written in Go
• ESP32 firmware: written in Arduino-style C++ with LVGL v8.4

• Snapshot-style upload
• No git history
• No expectation of maintenance
• May contain rough code, hardcoded values, or hacks

If you are looking for:

• A polished PC monitor: this is not it
• A reusable ESP32 framework: this is not it
• A reference PoC for ESP32 + PC metrics: this is it Use, fork, or ignore as you please.

This project was developed with human oversight and AI-assisted code generation.