Seeed Studio XIAO ESP32S3 Wi-Fi and Bluetooth 5.0 Development Board – 113991114

The Seeed Studio XIAO ESP32S3 is a compact, high-performance development board designed for Internet of Things, automation, robotics, portable devices and TinyML applications.

Its ESP32-S3R8 microcontroller integrates a 32-bit dual-core Xtensa LX7 processor running at up to 240 MHz. The combination of 8 MB PSRAM and 8 MB Flash enables demanding applications, local data processing and embedded artificial intelligence projects.

Wireless connectivity includes 2.4 GHz IEEE 802.11 b/g/n Wi-Fi, Bluetooth Low Energy 5.0 and Bluetooth Mesh. The supplied external antenna connects to the onboard U.FL/I-PEX connector for improved communication range and stability.

Despite measuring only 21 × 17.8 mm, the board provides 11 PWM-capable GPIO, nine ADC inputs, UART, I²C, I²S and SPI. It also features a USB Type-C port, programmable user LED, charging LED and Boot and Reset buttons.

Integrated battery management allows the board to operate from a 3.7 V lithium battery and charge it while connected through USB. Deep-sleep consumption can be as low as approximately 14 µA.

Castellated side pads make the board suitable for breadboards, soldered pin headers or direct surface mounting onto a custom PCB.

Main features

• Manufacturer: Seeed Studio
• Model: XIAO ESP32S3
• Part number: 113991114
• Microcontroller: Espressif ESP32-S3R8
• Processor: 32-bit dual-core Xtensa LX7
• Maximum clock speed: 240 MHz
• PSRAM: 8 MB
• Flash memory: 8 MB
• Wi-Fi: 2.4 GHz IEEE 802.11 b/g/n
• Bluetooth: Bluetooth Low Energy 5.0
• Bluetooth Mesh: supported
• GPIO: 11
• PWM: available on compatible GPIO
• Analogue inputs: 9 ADC
• Interfaces: UART, I²C, I²S and SPI
• Programmable LED: onboard
• Charging LED: onboard
• Buttons: Boot and Reset
• USB connector: USB Type-C
• Antenna connector: U.FL/I-PEX
• External 2.4 GHz antenna: included
• Logic voltage: 3.3 V
• USB-C power input: 5 V
• Battery power input: 3.7 V lithium battery
• Fast charging current: approximately 50 mA
• Trickle charging current: approximately 3.8 mA
• Typical active Wi-Fi consumption: approximately 100 mA
• Typical active BLE consumption: approximately 85 mA
• Modem-sleep consumption: approximately 27 mA
• Light-sleep consumption: approximately 2 mA
• Deep-sleep consumption: approximately 14 µA
• Operating temperature: -20 to +65 °C
• Dimensions: 21 × 17.8 mm
• Mounting: breadboard, soldered headers or surface mount
• Side terminals: castellated pads

Main pin assignment

• D0 / A0: GPIO1 / ADC / Touch
• D1 / A1: GPIO2 / ADC / Touch
• D2 / A2: GPIO3 / ADC / Touch
• D3 / A3: GPIO4 / ADC / Touch
• D4 / A4: GPIO5 / SDA / ADC / Touch
• D5 / A5: GPIO6 / SCL / ADC / Touch
• D6: GPIO43 / TX
• D7: GPIO44 / RX
• D8 / A8: GPIO7 / SCK / ADC / Touch
• D9 / A9: GPIO8 / MISO / ADC / Touch
• D10 / A10: GPIO9 / MOSI / ADC / Touch
• Power: 5 V, GND and 3.3 V

Programming compatibility

• Arduino IDE
• MicroPython
• CircuitPython
• ESP-IDF
• PlatformIO
• ESP32 libraries and ecosystem

Recommended applications

• Internet of Things
• Home automation
• Robotics
• Wireless sensors
• Portable and wearable devices
• TinyML and embedded AI projects
• Data monitoring and transmission
• Wi-Fi or Bluetooth control
• Battery-powered equipment
• Compact prototypes
• Custom PCB integration
• Educational and experimental projects

Package contents

• 1 Seeed Studio XIAO ESP32S3 board
• 1 external 2.4 GHz antenna with U.FL/I-PEX connector
• Unsoldered pin headers for mounting

Important note

This is the standard XIAO ESP32S3 version. It does not include a camera, digital microphone or microSD card slot; these components are available on the XIAO ESP32S3 Sense version.

The board uses 3.3 V logic levels. Do not apply 5 V signals directly to the GPIO.

When using a lithium battery, observe the BAT+ and BAT− polarity and use a suitable 3.7 V battery, preferably with a protection circuit. The battery and USB Type-C cable are not included.

Connect the external antenna to the U.FL connector before using Wi-Fi or Bluetooth. U.FL connectors are delicate and should be pressed vertically into place without twisting or pulling the cable.