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Feature

  • The First STM32-Powered XIAO: Built with the STM32C5A3CG, featuring a 144MHz Arm Cortex-M33 processor, floating-point support, and DSP instructions for embedded control and sensor processing.
  • CAN FD Connectivity Built-In: Two native CAN FD interfaces, with one channel connected to an onboard TCAN3403-Q1 transceiver and accessible CANH/CANL pads. Add an external transceiver to use the second channel.
  • 6-Axis IMU with Programmable Heating: The onboard LSM6DS3TR-C accelerometer and gyroscope are paired with dedicated heating resistors around the sensor. GPIO-controlled heating enables programmable warm-up and, with temperature-feedback firmware, closed-loop temperature regulation to help reduce temperature-related drift in robotics and motion-sensing applications.
  • 16MB External Flash: Store application data, sensor logs, configuration files, and CAN message records using application firmware.
  • External Crystal for Communication Timing: An onboard high-speed external crystal provides a clock reference for CAN FD and other timing-sensitive applications.
  • USB-C and Battery Charging: Develop over USB-C or build battery-powered devices using the onboard lithium-battery charging circuit and battery connection pads.
  • Compact, Integration-Friendly Design: The XIAO form factor and castellated edge pads support breadboard prototyping with headers and integration into custom carrier boards.

Specification

ItemSpecification
Product Versions
ProductXIAO STM32C5
XIAO STM32C5 (Pre-Soldered)
Processor & Memory
MicrocontrollerSTMicroelectronics STM32C5A3CG
CPUSingle-core Arm Cortex-M33, up to 144 MHz, with FPU and DSP instructions
Internal program Flash1 MB
SRAM256 KB
External Flash16 MB
External clockOnboard 48 MHz HSE crystal with ±10 ppm initial frequency tolerance
CAN FD Connectivity
CAN Interface2 native FDCAN interfaces
Onboard CAN transceiver1 × TI TCAN3403-Q1
Onboard CAN bus connectionCANH/CANL pads; use board GND as the signal reference
Second CAN channelDigital TX/RX signals
External CAN transceiver required
CAN termination120 Ω, enabled by default
Disconnectable through a cuttable solder link
IMU & Temperature Control
IMUSTMicroelectronics LSM6DS3TR-C, 3-axis accelerometer and 3-axis gyroscope
IMU heatingDedicated heating resistors around the IMU with GPIO-controlled drive
Temperature regulationProgrammable warm-up
Closed-loop setpoint regulation requires temperature feedback and suitable application firmware
Interfaces & Power
USBUSB-C
USB 2.0 Full Speed, 12 Mbps signaling rate
Logic level3.3 V
PowerUSB-C 5 V input
Lithium battery through BAT pads
Battery chargingOnboard charging circuit
Debug interfaceSWD
Controls & Form Factor
User buttonReset button
Boot button
IndicatorsUser LED
Charging LED
Form factorCompact XIAO module with castellated edge pads

Hardware Overview

Note

  • There are two additional GPIO on the plug-in camera sensor board linking to the microphone. If you want to apply these two external IO, the microphone should not be used at the same time.
  • TOP

 

 

  • BOTTOM

  • PinOut

 

 

Note Change Record

2025/6/30, Upgrade camera sensor from OV2640 to OV3660.

 

Application

  • USB-to-CAN FD Development: Build a compact interface for CAN device testing, message exchange, and host-based analysis with suitable firmware and software.
  • CAN Sensor Nodes: Send motion measurements and data from external sensors over a wired CAN network.
  • Robot and Motion Controllers: Communicate with external CAN-enabled motor drives for robotics and motion-control prototypes.
  • Motion-Sensing and Stabilization Development: Explore IMU preheating and temperature regulation for robot startup routines, stabilization systems, and sensor-fusion experiments.
  • Embedded Data Logging: Record selected CAN traffic, IMU measurements, and application events in external Flash.
  • Portable Development Tools: Create battery-powered monitoring devices, test fixtures, and compact diagnostic prototypes.

Documents

Certification

HSCODE8517180050
USHSCODE8517180050
UPC
EUHSCODE8543709099
COOCHINA

Part List

XIAO ESP32-S3 

x1

Plug-in camera sensor board

x1

Aluminum Heat Sink For XIAO 

x2

7 Pin Header 

x2

Antenna

x1

Note: From Sep 2, 2024, XIAO ESP32S3 Sense (113991115) ships with 2 heat sinks in China Warehouse. US&Germany warehouses ships new version from 2025.

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Seeed Studio XIAO ESP32-S3 Sense

SKU 113991115

Seeed Studio XIAO ESP32-S3 leverages dual-core ESP32-S3 chip, supporting both Wi-Fi and BLE wireless connectivities, which allows battery charge. It integrates built-in camera sensor, digital microphone. It offers 8MB PSRAM, 8MB FLASH, and external SD card slot. All of these make it suitable for embedded ML, like intelligent voice and vision AI.

XIAO Dev Board
Pin Header
Package
USD$18.90
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