ESP32 Morse Code Interpreter (TFT + 5 Buttons)

Turn an ESP32, a 1.8" ST7735 SPI TFT, and five push-buttons into a real-time Morse → Text typer.
Tap DOT/DASH, press NEXT LETTER to translate the letter, SPACE for word gaps, and RESET to clear.
No timing detection—just fast, reliable input.

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✨ Features

• 5-button workflow (no dot/dash timing headaches)
• Live TFT UI:
  • “Morse:” shows the current Morse sequence (.-..)
  • “Text:” shows translated text
• Debounced button reads (stable input)
• Minimal dependencies: Adafruit_GFX + Adafruit_ST7735
• Works with Arduino IDE or PlatformIO

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🧩 Hardware

Parts

• ESP32 Dev Board (e.g., ESP32-WROOM DevKit)
• 1× 1.8" ST7735 SPI TFT (128×160)
• 5× Momentary push buttons
• (Optional) Breadboard, jumper wires

TFT Wiring (ST7735 over SPI)

TFT Pin	ESP32 Pin	Note
CS	GPIO 5	Chip Select
DC	GPIO 16	Data/Command
RST	GPIO 17	Reset
SCLK	GPIO 18	VSPI SCK
MOSI	GPIO 23	VSPI MOSI
VCC	3V3	Power
GND	GND	Ground
MISO	—	Not used

Power the TFT at 3.3V. Ensure common GND with the ESP32.

Button Wiring (Active-LOW, using internal pull-ups)

All buttons are wired the same way:

• One leg → ESP32 GPIO
• Other leg → GND

Enable INPUT_PULLUP in code so LOW = pressed.

Button	ESP32 GPIO
DOT	GPIO 32
DASH	GPIO 33
NEXT	GPIO 25
SPACE	GPIO 26
RESET	GPIO 27

These pins are chosen to avoid conflicts with the VSPI TFT pins.

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📁 Project Structure

esp32-morse-interpreter/
├─ src/
│ └─ main.cpp
├─ include/
├─ lib/
├─ docs/
│ ├─ esp32-morse.png # schematics svg
│ ├─ esp32-morse-schematic.pdf # printable diagram
│ └─ cover.png
├─ platformio.ini # if using PlatformIO
└─ README.md

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🔧 Setup

Option A — PlatformIO (recommended)

1. Create a new PlatformIO project (board: esp32dev).
2. Replace platformio.ini with:

[env:esp32dev]
platform = espressif32
board = esp32dev
framework = arduino
monitor_speed = 115200
lib_deps =
  adafruit/Adafruit GFX Library
  adafruit/Adafruit ST7735 and ST7789 Library