LILYGO T4

Overview

The LILYGO T4 is an ESP32-based development board that pairs the versatile ESP32 microcontroller with an ILI9341 TFT LCD display, available in either 2.2-inch or 2.4-inch variants. The board targets makers, engineers, and students who need a compact, color display-equipped development platform with wireless connectivity built in.

Featuring 8MB of PSRAM alongside 4MB of Flash, the T4 provides ample memory for graphics-intensive applications and data buffering. The ILI9341 display driver supports 320x240 resolution with 65K colors over a 4-wire SPI interface, making it compatible with the popular TFT_eSPI library. Battery operation is supported via a JST GH 1.25mm connector, and the CH9102F serial chip provides reliable USB-to-UART communication.

Firmware Compatibility

The T4 is fully supported by the Arduino IDE and MicroPython. The TFT_eSPI library is the recommended display library, and community examples are available in the GitHub repository. Standard ESP32 Arduino core libraries apply for WiFi and Bluetooth functionality.

Flashing Guide

1. Install the ESP32 Arduino core via Boards Manager in Arduino IDE.
2. Connect the board via USB; drivers for CH9102F may be required on some systems.
3. Select "ESP32 Dev Module" or the appropriate T4 board in Arduino IDE.
4. Set Flash size to 4MB and PSRAM to enabled in board settings.
5. Upload your sketch; use the Boot button if the board does not enter download mode automatically.