The Seeed Studio XIAO ESP32C3 is a compact microcontroller board built around the ESP32-C3 RISC-V SoC. It features complete Wi-Fi and Bluetooth 5.0/BLE connectivity in the signature XIAO thumb-sized form factor (21 × 17.8 mm), making it well suited for IoT, wearables, and low-power wireless projects.

With Arduino and CircuitPython support, a rich set of GPIO, and deep sleep consumption as low as 44 µA, the XIAO ESP32C3 balances versatility with power efficiency. All components are mounted on one side for clean, production-ready designs.

Key Features

• RISC-V Processor – ESP32-C3 single-core 32-bit, up to 160 MHz
• Wireless – 2.4 GHz Wi-Fi and Bluetooth 5.0/BLE mesh; U.FL antenna connector for 100 m+ range
• Memory – 400 KB SRAM, 4 MB flash
• GPIO – 11× GPIO (PWM capable), 4× ADC, 1× UART, 1× I²C, 1× SPI
• Power Modes – Active (<75 mA), modem-sleep (<25 mA), light-sleep (<4 mA), deep-sleep (>44 µA)
• Battery Support – Lithium battery charge management (350 mA / 100 mA)
• Compact Size – 21 × 17.8 mm, single-sided component mounting
• Operating Voltage – 3.3 V @ 200 mA; 5 V input (VIN)
• Temperature Range – −40 °C to 85 °C
• Development – Arduino and CircuitPython supported

Ideal For

• IoT and connected device projects
• Wearable devices and health monitoring
• Low-power wireless sensor networks
• Rapid prototyping and education

Resources

• ESP32-C3 Datasheet (PDF)
• XIAO Series SOM Datasheet (PDF)
• XIAO ESP32C3 Pinout Sheet (XLSX)
• Schematic & PCB Design Files (ZIP)
• Low Power Consumption Report (PDF)
• Bottom Pad Positioning / Dimensions (ZIP)
• RoHS Compliance Report (PDF)
• XIAO Reference Design (PDF)
• 3D Printing Case Studies (PDF)
• XIAO Starter Kit Courses – Free tutorials for getting started
• Grove Ecosystem Wiki – Compatible Grove modules and expansion