T-Dongle ESP32-S2 WiFi development board comes with two USB OTG ports

LilyGO has been very busy in recent weeks, and their latest product is the “T-Dongle ESP32-S2” development board that looks very much like Espressif ESP32-S3-USB-OTG board development board but is equipped with the single-core WiFi -only ESP32-S2 processor instead of the dual-core ESP32-S3 SoC with WiFi 4 and Bluetooth 5.0.

The T-Dongle ESP32-S2 board is designed for the development of USB applications and comes with USB OTG female and male ports, as well as the same 1.14-inch color display found on T-Display RP2040/ESP32 and T-PicoC3 boards.

T-Dongle ESP32-S2 development board specifications:

  • Wireless SoC – Espressif Systems ESP32-S2 single-core Xtensa LX7 processor @ up to 240 MHz with 320 kB SRAM, 128 kB ROM, WiFi 4 connectivity
  • Antennas – 3D antenna, IPEX antenna connector
  • Storage – MicroSD card socket
  • Display – 1.14-inch full-color IPS LCD Display (ST7789V SPI controller) with 240 x 135 resolution
  • USB
    • 1x USB OTG female port to connect an external USB device (eg mouse, keyboard, thumb drive, etc…)
    • 1x USB OTG male port for debugging and programming the board
  • Expansion – Grove connector
  • Misc – Boot and Reset buttons, DIP switch to turn on/off the OTG function on the male port
  • Power Supply – 5V via USB male port
  • Dimensions – 7.2 x 2.3 x 1.2 cm

ESP32-S2 USB development boardThe company says the board can be programmed with the Arduino IDE or VS Code and provides a completely empty Github repository. Until some code is committed, you may have to check out ESP32-S3-USB-OTG’s documentation for the USB function (using ESP-IDF VS Code Extension), as well as code samples, and TTGO-T-Display repo for the display code (Arduino sketch). It’s not ideal…

That type of board is probably mostly interesting for software development of applications leveraging the USB capabilities of the ESP32-S2 or ESP32-S3 processor, and it could be used for USB camera video streaming, as a 4G WiFi hotspot, a wireless USB storage device , etc…

LilyGO T-Dongle ESP32-S2 development board is quite cheaper than the official $35 ESP32-S3-USB-OTG board, as it is currently selling for $13.32 including shipping.

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