Seeed Studio XIAO ESP32C3

Board
by Seeed Studioxiao-esp32c3≈ cheap (under ~$15)

Also known as: seeed_xiao_esp32c3

Verify my boardCompareEdit on GitHub
Flash this board — 1 firmware option · Unverified
Seeed Studio XIAO ESP32C3 pinout
Pinout

Specifications

Radiosinherited from ESP32-C3

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
xiao
Dimensions
21 × 17.8 mm
Battery connector
yes
Charging
yes

Display & extras

Extras
external-antenna-ipex
Built onSeeed Studio XIAO ESP32C3 BoardESP32-C3 SoC

Thumb-sized bare-C3 XIAO board: 4 MB flash, USB-C, onboard LiPo charging, U.FL external antenna.

Firmware for this board

Unverified

  • NerdMiner v2Unverifieddisplay
    Flash NerdMiner v2guided

    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

  • 4 MB flash, no PSRAM
  • U.FL external antenna included
  • onboard Li-ion charge management + charge LED
  • io.gpio_exposed=11 QUOTED: vendor Specifications table states "11x GPIO(PWM)"
  • io.gpio_free=8 DERIVED, not quoted (SPEC-io-power.md §5.3). Pin Map table breaks out D0-D10 = 11 pads total (quoted: D0=GPIO2, D1=GPIO3, D2=GPIO4, D3=GPIO5, D4=GPIO6, D5=GPIO7, D6=GPIO21, D7=GPIO20, D8=GPIO8, D9=GPIO9, D10=GPIO10). Subtracting esp32-c3's soc.reserved_pins that are exposed -- strapping {2,8,9} (3, all exposed) and usb_flash_tied {18,19} (0 exposed) -- gives 11 - 3 - 0 = 8. Math not vendor-stated; verify before treating as exact.
  • io.power_out QUOTED: vendor Specifications table states "Max 3.3V Output Current: 500mA" (Power(Typ.) row, Test Condition: BAT Pin Input @ 3.8V, Source Capability: 3A). Note: the page's separate "Power Pins" narrative section states a conflicting "You can draw 700mA" for the 3V3 pin (likely reused boilerplate across the XIAO line); the formal spec-table figure is used here as the board-specific value.

Verify my board

Reads the connected chip over USB and checks it against what esp-atlas cites for Seeed Studio XIAO ESP32C3 — 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.