LILYGO T-RGB round color touch display is powered by ESP32-S3R8 wireless microcontroller

LILYGO T-RGB is a wireless 2.1-inch round color touchscreen display based on ESP32-S3R8 dual-core microcontroller with WiFi 4 and Bluetooth 5.0 connectivity, 8MB PSRAM, and 16MB flash storage.

The device also includes a microSD card socket for data storage and a Grove I2C connector for expansion and supports LiPo battery power. The company also says it can be charged through USB, so the board must include a battery charging circuit contrary to some other boards from LILYGO.


LILYGO T-RGB specifications:

  • SoC – Espressif ESP32-S3R8 dual-core Tensilica LX7 microcontroller up to 240 MHz with vector instructions for AI acceleration, 8MB PSRAM, WiFi 4 and Bluetooth 5.0 LE + Mesh connectivity
  • Storage – 16MB SPI flash, MicroSD card socket
  • Display – 2.1-inch round 18-bit RGB color IPS TFT display with 480×480 resolution (ST7701S SPI controller), touchscreen panel
  • USB – USB Type-C port for power and programming
  • Expansion – Grove I2C connector
  • Misc – BOOT and Reset buttons
  • Power Supply
    • 5V via USB Type-C port
    • 1.25mm pitch connector for LiPo battery, battery capacity detection
  • Dimensions – 63 x 59.5 x 18.28  mm
ESP32-S3R8 round display
Pinout diagram

We’re also told the ESP32-S3 does not have enough pins, so a Xinluda XL9535 I2C I/O expander chip had to be used in this design. You’ll find the schematic, some Arduino/PlatformIO examples, and documents on GitHub. It also include an Autodesk file (DWG) to print a 3D enclosure for the display.

LILYGO is selling the T-RGB wireless display on Aliexpress for $32.28 including shipping together with a cable for the battery.

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