# Rack System Status Display

## Overview

This project displays the active system status on a 1.28" round TFT LCD mounted on the front panel of a 19" rack enclosure.

On startup, a custom logo is displayed for approximately 10 seconds. The display then changes to indicate whether **System A** or **System B** is currently selected.

System selection is determined by the voltage level present on a dedicated ESP32-S2 GPIO input.

## Hardware

### Microcontroller

* ESP32-S2

### Display

* 1.28" Round TFT LCD
* 240 x 240 resolution
* GC9A01 controller
* 4-wire SPI interface

## Function

1. Power-up device.
2. Display startup logo for approximately 10 seconds.
3. Read system select input pin.
4. Display:

   * **SYSTEM A ACTIVE**
   * **SYSTEM B ACTIVE**
5. Continuously monitor the input pin and update the display if the selected system changes.

## Software

* Arduino IDE
* ESP32 Arduino Core
* TFT_eSPI library

## GPIO

| Function            | ESP32-S2 Pin |
| ------------------- | ------------ |
| System Select Input | TBD          |
| TFT MOSI            | TBD          |
| TFT SCLK            | TBD          |
| TFT CS              | TBD          |
| TFT DC              | TBD          |
| TFT RST             | TBD          |
| TFT BL              | TBD          |

## Build

1. Install Arduino IDE.
2. Install ESP32 board support package.
3. Install TFT_eSPI library.
4. Configure display settings for GC9A01.
5. Compile and upload to the ESP32-S2.

## Future Improvements

* Custom graphics and branding.
* Input debounce/filtering.
* Network status monitoring.
* Brightness control.
* Animated startup screen.