ESP32-Chipshift

A collection of ESP32 and Arduino tools and utilities for embedded systems development, focusing on display interfaces and digital potentiometer control.

📋 Overview

This repository contains four distinct projects designed to simplify embedded systems development:

1. CYD Nixie Clock - Wi-Fi connected NTP clock for the Cheap Yellow Display (CYD)
2. SD1306 Image Editor - Image to bitmap converter for OLED displays
3. TFT Display Bitmaps Tool - JPEG to RGB565 converter for TFT displays
4. TPL-0501-100 ESP32 - Digital potentiometer control library

🛠️ Projects

1. CYD Nixie Clock

An ESP32-based clock sketch that renders a retro Nixie tube theme on the 320×240 TFT included with the Cheap Yellow Display (CYD). The firmware uses Wi-Fi to sync with public NTP servers, keeps time locally using millis(), and only redraws digits when they change for flicker-free visuals.

Features:

• Wi-Fi and NTP powered time keeping with hourly resync
• Custom Nixie style digits with blinking colon animation
• Tunable timezone offset, NTP servers, and refresh intervals
• Compatible with Bodmer's TFT_eSPI library and CYD pinout

Location: CYD_Clock/

Quick Start:

cd CYD_Clock
open NixieClockCYD.ino in the Arduino IDE

1. Configure the TFT_eSPI User_Setup.h for your panel/pinout
2. Add your Wi-Fi credentials and timezone offset in the sketch
3. Upload to a CYD (ESP32-2432S028R) or similar ESP32+ST7789 board

Read more →

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2. SD1306 Image Editor

A bitmap converter tool for SD1306 OLED displays compatible with Arduino, ESP32, and ESP8266 using the Adafruit GFX Library.

Features:

• Convert images to C arrays for SD1306 displays
• Built with Python tkinter for easy GUI interaction
• Direct integration with Adafruit GFX Library
• Visual image preview and editing

Location: SD1306-Image-Editor/

Quick Start:

python editor3.py

Read more →

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3. TFT Display Bitmaps Tool

A Python utility that converts JPEG images into RGB565 format C arrays suitable for embedded systems with TFT displays.

Features:

• JPEG to RGB565 C array conversion
• Little-endian byte order for ESP32 compatibility
• Automatic output file generation
• Optimized for TFT_eSPI and Adafruit_GFX libraries
• Memory-efficient 16-bit color format

Location: TFT_Display_Bitmats_Tool/

Requirements:

• Python 3.x
• Pillow library

Quick Start:

pip install Pillow
python rbg.py <image_file.jpg>

Read more →

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4. TPL-0501-100 ESP32

Arduino sample code for controlling the TPL0501 Digital Potentiometer with ESP32. Includes examples for both single and dual digital potentiometer configurations.

Features:

• Single digital potentiometer control
• Dual digital potentiometer control
• I2C communication examples
• Part of a next-generation joystick project for the Color Computer

Location: TPL-0501-100ESP32/

Files:

• singledigipot.ino - Single digipot example
• dualdigipotTPL0501.ino - Dual digipot example

Quick Start:

1. Open .ino file in Arduino IDE
2. Select your ESP32 board
3. Upload to your device

Read more →

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🎯 Use Cases

• Embedded Display Development: Convert images for OLED and TFT displays
• IoT Timekeeping: Build Wi-Fi synchronized clocks for the Cheap Yellow Display
• Retro Computing: Digital potentiometer control for vintage hardware interfaces
• ESP32 Projects: Ready-to-use utilities for common ESP32 display and I/O tasks
• Arduino Development: Cross-platform tools for Arduino-based projects

📦 Requirements

General

• ESP32 or Arduino-compatible board
• Arduino IDE or PlatformIO

For Image Tools

• Python 3.x
• Pillow library (for TFT tool)
• tkinter (for SD1306 editor)

For Hardware Projects

• TPL0501 Digital Potentiometer (for digipot project)
• SD1306 OLED Display (128x64) or TFT Display

🚀 Getting Started

1. Clone this repository:

   git clone https://github.com/reyco2000/ESP32-Chipshift.git
   cd ESP32-Chipshift

2. Navigate to the project folder you need:

   cd CYD_Clock             # For the Wi-Fi Nixie clock
   cd SD1306-Image-Editor     # For SD1306 tools
   cd TFT_Display_Bitmats_Tool # For TFT tools
   cd TPL-0501-100ESP32       # For digital potentiometer

3. Follow the specific README in each folder for detailed instructions

👤 Author

Reinaldo Torres Email: [email protected]

📄 License

This project is open source and available under the terms specified in the LICENSE file.

🤝 Contributing

Contributions, issues, and feature requests are welcome! Feel free to check the issues page or submit a pull request.

📝 Notes

• Ensure your images are appropriately sized for your target microcontroller's memory
• For ESP32 with PSRAM, larger images are supported
• Consider using PROGMEM or SPIFFS for storing large image arrays
• Test digital potentiometer configurations with appropriate resistor values

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Made with ❤️ for the embedded systems community