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Interactive pinout

Seeed XIAO ESP32-C3 pinout

XIAO form factor, USB-C at the top. Pin names D0–D10 are Seeed's Arduino aliases for the underlying GPIO numbers.

  • GPIO
  • Power
  • Ground / N.C.
  • Reset
  • Has a warning

Selected pin

D9 / MISOGPIO9

Boot-critical — avoid

GPIOPWMSPI

Default SPI MISO.

spi
MISO

Boot-critical: Strapping pin (GPIO9): LOW at reset enters download mode.

Code for this pin

const int PIN = D9;

void setup() {
  pinMode(PIN, OUTPUT);
}

void loop() {
  digitalWrite(PIN, HIGH);
  delay(500);
  digitalWrite(PIN, LOW);
  delay(500);
}
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Good to know

  • ›The LiPo battery pads and the external antenna connector are on the back.
  • ›XIAO ESP32-C3 has an on-board user LED on GPIO10 (active-low).
Full Seeed XIAO ESP32-C3 specs ESP32 pins to avoid

Where to buy

Adafruit SparkFun Amazon AliExpress

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