Seeed Studio XIAO ESP32S3 Sense MCU

Seeed Studio XIAO ESP32S3 Sense MCU

R 413.66



Seeed Studio XIAO ESP32S3 Sense is built around a highly-integrated, Xtensa processor ESP32-S3R8 SoC, which supports 2.4GHz WiFi and low-power Bluetooth® BLE 5.0 dual-mode for multiple wireless applications. It has lithium battery charge management capability.

As the advanced version of Seeed Studio XIAO ESP32S3, this board comes with a plug-in OV2640 camera sensor for displaying full 1600*1200 resolution. The base of it is even compatible with OV5640 for supporting up to 2592*1944 resolution. The digital microphone is also carried with the board for voice sensing and audio recognition.

With powerful SoC and built-in sensors, this development board has 8MB PSRAM and 8MB FLASH on the chip, an additional SD card slot for supporting up to 32GB FAT memory. These allow the board for more programming space and bring even more possibilities into embedded ML scenarios.

Being a number to the Seeed Studio XIAO family, the board maintains the classic thumb-sized form-factor design and elegant productization of single-sided components mounting.

Highlighted Features

  • Powerful MCU Board: Incorporate the ESP32S3 32-bit, dual-core, Xtensa processor chip operating up to 240 MHz, mounted multiple development ports, Arduino / MicroPython supported
  • Advanced Functionality: Detachable OV2640 camera sensor for 1600*1200 resolution, compatible with OV5640 camera sensor, integrating the additional digital microphone
  • Great Memory for more Possibilities: Offer 8MB PSRAM and 8MB FLASH, supporting SD card slot for external 32GB FAT memory
  • Outstanding RF performance: Support 2.4GHz Wi-Fi and BLE dual wireless communication, support 100m+ remote communication when connected with U.FL antenna
  • Thumb-sized Compact Design: 21 x 17.5mm, adopting the classic form factor of XIAO, suitable for space-limited projects like wearable devices


  • Image processing
  • Speech Recognition
  • Video Monitoring
  • Wearable devices
  • Smart Homes
  • Health monitoring
  • Education
  • Low-Power(LP) networking
  • Rapid prototyping



Seeed Studio XIAO ESP32S3

Seeed Studio XIAO ESP32S3 Sense



Xtensa LX7 dual-core,32-bit processor that operates at up to 240 MHZ


Complete 2.4GHz Wi-Fi subsystem

BLE: Bluetooth 5.0, Bluetooth mesh

Built-in Sensors


oV2640 camera sensor for 1600*1200

Digital Microphone


On-chip 8M PSRAM & 8MB Flash

On-chip 8M PSRAM & 8MB Flash
Onboard SD Card Slot, supporting 32GB FAT


1x UART,1x IIC,1x llS,1x SPl,11xGPIOs (PWM),9x ADC,1x User LED,1x Charge LED

1x Reset button,1x Boot button

1x UART,1x lIC,1x lIS,1x SPI,11x GPIOs (PWM),9xADC,1x User LED, 1x Charge LED,1x B2B Connector(with 2 additional GPIOs)

1x Reset button, 1x Boot button


21 x 17.5mm

21 x 17.5 x 15mm (with expansion board)



Input voltage (Type-C): 5V

lnput voltage (BAT): 4.2V

Circuit operating Voltage (ready to operate):

- Type-C:5V@19mA

- BAT: 3.8V@22mA

Circuit operating Voltage (ready to operate):

-Type-C: 5V@38.3mA

- BAT: 3.8V@43.2mA (with expansion board)


Webcam Web application:

- Type-C:
- - Average power consumption: 5V/138mA

- - Photo moment: 5V/341mA
- Battery:
- - Average power consumption: 3.8V/154mA

- - Photo moment: 3.8V/304mA


Microphone recording & SD card writing:- Type-C:
- - Average power consumption: 5V/46.5mA

- - Peak power consumption: 5V/89.6mA

- Battery:
- - Average power consumption: 3.8V/54.4mA

- - Peak power consumption: 3.8V/108mA

Charging battery current:50mA

Charging battery current:100mA

Low Power Consumption Model

(Supply Power: 3.8V)

Modem-sleep Model:~ 25mA

Light-sleep Model: ~ 2 mA

Deep Sleep Model:~14 μA

Modem-sleep Model: ~44mA

Light-sleep Model: ~5mA

Deep Sleep Model: ~3mA

Wi-Fi Enabled Power Consumption

Active Model: ~ 100 mA

Active Model: ~ 110 mA (with expansion board)

BLE Enabled Power Consumption

Active Model: ~85 mA

Active Model: ~ 102 mA (with expansion board)

Working Temperature

-40°C ~65°C

Hardware Overview

Figure 1: Device Schematics

Figure 2: Pinout

Figure 3: Similar to above