T-Dongle-S3

Board
by LILYGOlilygo-t-dongle-s3≈ cheap (under ~$15)
Verify my boardCompareEdit on GitHub
Flash this board — 3 firmware options · Known good
T-Dongle-S3 board
Board
T-Dongle-S3 pinout
Pinout

Specifications

Radiosinherited from ESP32-S3

Wi-Fi
Wi-Fi 4 · 2.4 GHz
Bluetooth LE
BLE 5
Bluetooth Classic
no
802.15.4
no

USB

Native USB
yes

Board

Form factor
t-dongle

Display & extras

Display
0.96in 80x160 ST7735 IPS
Built onT-Dongle-S3 BoardESP32-S3 SoC

Compact ESP32-S3 dongle-form board with a 0.96in ST7735 IPS display and 16 MB flash.

Firmware for this board

Known good

  • LauncherKnown goodmultirelease .bin
    Flash Launcherin-browserknown-good

    Known good esp-atlas asserts this board↔firmware link at the shown trust tier — it does not guarantee your specific unit or the current firmware version. Flashing can erase keys/config and can brick the device. At your own risk.

Reported

  • ESPHomeReportedhomeweb flasher
    Flash ESPHomeweb flasher

    Reported esp-atlas asserts this board↔firmware link at the shown trust tier — it does not guarantee your specific unit or the current firmware version. Flashing can erase keys/config and can brick the device. At your own risk.

Unverified

  • USB Army KnifeUnverifiedbadusb
    Flash USB Army Knifeguided

    Unverified esp-atlas asserts this board↔firmware link at the shown trust tier — it does not guarantee your specific unit or the current firmware version. Flashing can erase keys/config and can brick the device. At your own risk.

Notes

  • ESP32-S3 Xtensa LX7; 16 MB flash
  • Wi-Fi 802.11 b/g/n, Bluetooth 5
  • Available in LCD/no-LCD and internal/external-antenna variants
  • LilyGO's official spec table for T-Dongle-S3 explicitly lists "No PSRAM"
  • io.gpio_free=2 DERIVED, not quoted (SPEC-io-power.md §5.3). The vendor Pin Diagram table lists RGB DIN=GPIO40, RGB CLK=GPIO39, SDMMC D0-D3/CLK/CMD=GPIO14/17/21/18/12/16, Button=GPIO0, QWIIC TX=GPIO43, QWIIC RX=GPIO44 -- of these, only the QWIIC connector (TX/RX) is externally accessible; the RGB LED, SD slot, and button rows are internal-only. So the board's exposed-pad set is {43,44} (2 pads). Subtracting esp32-s3's soc.reserved_pins that are exposed -- neither 43 nor 44 is in strapping {0,3,45,46} or usb_flash_tied {19,20,35,36,37} -- gives 2 - 0 = 2. Math not vendor-stated; verify before treating as exact.

Verify my board

Reads the connected chip over USB and checks it against what esp-atlas cites for T-Dongle-S3 — over Web Serial, no backend, nothing leaves your browser.

In-browser verify needs Web Serial: Chrome or Edge on a desktop. Safari, Firefox and phones cannot do it.

Serial monitor

Not connected.