How to Use T-Display-S3: Examples, Pinouts, and Specs

The T-Display-S3 by Lilygo is a compact display module featuring a 1.14-inch TFT screen, powered by the ESP32-S3 microcontroller. This versatile module is designed for projects requiring graphical output, making it ideal for IoT devices, portable displays, and embedded systems. With its built-in Wi-Fi and Bluetooth capabilities, the T-Display-S3 is well-suited for applications such as smart home devices, wearable technology, and data visualization.

• IoT dashboards and monitoring systems
• Wearable devices with graphical interfaces
• Portable data loggers and visualizers
• Educational and prototyping projects
• Smart home control panels

1. Powering the Module: Connect the USB-C port to a 5V power source or use the 3.3V pin for external power.
2. Connecting to a Microcontroller: Use the SPI or I2C interface to communicate with the display. Ensure proper pin connections for data, clock, and chip select.
3. Programming: The T-Display-S3 can be programmed using the Arduino IDE or ESP-IDF. Install the necessary libraries for the ESP32-S3 and the ST7789 display driver.

• Voltage Levels: Ensure all GPIO pins operate at 3.3V logic levels to avoid damage.
• Heat Management: The ESP32-S3 may generate heat during operation. Ensure proper ventilation or heat dissipation if used in enclosed spaces.
• Library Compatibility: Use the latest versions of libraries like TFT_eSPI for optimal performance.
• Pin Multiplexing: Some GPIO pins may have specific functions (e.g., SPI, I2C). Refer to the ESP32-S3 datasheet for details.

Below is an example of how to display text on the T-Display-S3 using the Arduino IDE:

#include <TFT_eSPI.h> // Include the TFT library

TFT_eSPI tft = TFT_eSPI(); // Create an instance of the display

void setup() {
  tft.init(); // Initialize the display
  tft.setRotation(1); // Set display orientation
  tft.fillScreen(TFT_BLACK); // Clear the screen with black color

  tft.setTextColor(TFT_WHITE, TFT_BLACK); // Set text color and background
  tft.setTextSize(2); // Set text size

  tft.setCursor(10, 10); // Set cursor position
  tft.println("Hello, T-Display-S3!"); // Print text to the display
}

void loop() {
  // Add your code here for dynamic updates
}

• Install the TFT_eSPI library from the Arduino Library Manager.
• Configure the User_Setup.h file in the TFT_eSPI library to match the T-Display-S3's pin configuration.

1. Display Not Turning On:

   • Ensure the module is powered correctly (check USB-C or 3.3V input).
   • Verify the SPI or I2C connections are secure and correctly configured.

2. No Output on the Display:

   • Check the TFT_eSPI library configuration in User_Setup.h.
   • Ensure the correct pins are defined for SPI communication.

3. Flickering or Artifacts on the Screen:

   • Verify the power supply is stable and sufficient.
   • Check for loose or poor-quality connections.

4. ESP32-S3 Not Detected by Arduino IDE:

   • Install the ESP32 board package in the Arduino IDE.
   • Ensure the correct COM port and board type are selected.

• Use a multimeter to verify power and signal levels.
• Update the ESP32-S3 firmware and libraries to the latest versions.
• Test the module with example sketches from the TFT_eSPI library to confirm functionality.
• If issues persist, consult the Lilygo documentation or community forums for additional support.