Seeed Studio XIAO ESP32-C3 – Compact 32-bit RISC-V Wi-Fi & BLE IoT Board

The XIAO ESP32-C3 brings powerful wireless connectivity to a thumbnail-sized development board. Built on a 160 MHz RISC-V single-core processor, it integrates 2.4 GHz Wi-Fi, Bluetooth 5, and BLE Mesh, enabling long-range wireless communication with an external U.FL antenna.

Designed for energy-efficient embedded projects, the board supports four operating modes, reaching as low as 44 µA in deep-sleep, making it ideal for portable and battery-powered electronics. With an onboard lithium battery charging circuit, the XIAO ESP32-C3 can operate as a standalone wearable module without extra hardware.

The hardware follows the classic Seeed Studio XIAO one-sided SMD layout, keeping the footprint breadboard-friendly and production-ready for commercial PCBA integration. With 11 GPIO (PWM-capable), 4 analog inputs, UART/I²C/SPI, reset/boot buttons, and 4 MB Flash memory, developers get a flexible platform for sensors, automation, and IoT control systems.

The XIAO ESP32-C3 ships with an external antenna and supports Arduino, CircuitPython, and other popular frameworks for easy development.

🚀 Key Features 

• 32-bit RISC-V MCU @ 160 MHz for responsive embedded processing

• Integrated Wi-Fi + Bluetooth 5 / BLE Mesh for IoT communication

• <44 µA deep-sleep consumption helps extend battery life

• Onboard Li-ion charge management for portable projects

• Over 100 m wireless range using the U.FL antenna

• Tiny footprint – approx. 21 × 17.8 mm for wearable devices

• Breadboard-friendly & SMD-ready form factor

• Arduino & CircuitPython support for easy programming

• No backside components—ideal for mass-production PCBA

🛠️ Typical Applications

• Internet-of-Things (IoT) sensors

• Wearable devices

• Portable health-monitoring gadgets

• Low-power wireless nodes

• Smart home devices

• Robotics and education prototyping

• Edge-connected data loggers
  

  Parameter	Specification
  MCU	ESP32-C3 RISC-V Single-Core, 160 MHz
  Wireless	2.4 GHz Wi-Fi + Bluetooth 5 / BLE Mesh
  RAM	400 KB SRAM
  Flash	4 MB
  Interfaces	UART × 1, I²C × 1, SPI × 1, 11× GPIO (PWM), 4× ADC
  Buttons	Reset & Boot
  Operating Voltage	3.3 V @ ~200 mA
  Battery Charging	Supported (Li-ion charge circuit)
  Input Voltage	5 V
  Deep-Sleep Current	~44 µA
  Wi-Fi Active	<75 mA
  BLE Active	<27 mA
  Dimensions	~21 × 17.5–17.8 mm
  Working Temperature	−40 °C to +85 °C
  Antenna	External U.FL Included