LOLIN S3

Board
by LOLIN (WEMOS)lolin-s3≈ cheap (under ~$15)
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LOLIN 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
Connector
usb-c

Board

Form factor
devkit
Dimensions
65.3 × 25.4 mm
Built onLOLIN S3 BoardESP32-S3 SoC

Full-size ESP32-S3-WROOM-1 board: 16 MB flash, 8 MB PSRAM, dual Type-C (native OTG + UART bridge), onboard I2C port, 31 IO.

Firmware for this board

No firmware recipes yet — help add one.

Notes

  • Based on ESP32-S3-WROOM-1; 16 MB flash (Quad SPI), 8 MB PSRAM (Octal SPI)
  • 31x digital I/O pins
  • Two Type-C USB ports: one native USB OTG, one UART bridge
  • Onboard LOLIN I2C port
  • Weight: 9.0 g
  • io.gpio_exposed=31 QUOTED: vendor page states "31x IO" (Features) and "Digital I/O Pins | 31" (Technical specs table); no enumerated GPIO pin-list/table is published in the spec table, so power_out is omitted
  • io.gpio_free=27 DERIVED: the vendor's own labeled pinout diagram (s3_v1.0.0 silkscreen photo) enumerates exactly 31 header GPIO pads (0-18, 21, 38-48) -- matching the "31x IO" spec exactly. Of esp32-s3's soc.reserved_pins, strapping 0/3/45/46 are all exposed (4 pins); usb_flash_tied 19/20/35/36/37 are all absent from the header (19/20 feed the native USB-OTG port directly, 35-37 the octal PSRAM/flash SPI0 bus) -- so 31 - 4 = 27

Verify my board

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Serial monitor

Not connected.