The XIAO ESP3S3 is a thumb size module enabled with 2.4GHz Wi-Fi and BLE 5.0 connectivity. The new SeeedStudio board includes lithium battery charging support and it provides up to 11x GPIOs.

Unlike the XIAO ESP32C3 (32-bit RISC-V based) launched last year, the XIAO ESP32S3 integrates a 32-bit Xtensa LX7 processor.

• ESP32-S3R8 — Dual-core Xtensa LX7 (up to 240 MHz); 8M PSRAM, 8MB Flash

ESP32S3 block diagram
(click image to enlarge)

The XIAO ESP32S3 includes support for 11x GPIOs (PWM), 9x ADC pins, 1x UART, 1x I2C, 1x I2S and 1x SPI. The board also features 1x User LED, 1x Charge LED, 1x Reset Button and 1x Boot Button.

According to the SeeedStudio, the XIAO ESP3S3 “is connected with the U.FL antenna, the remote communication distance can reach up to 100 meters.”

       
XIAO ESP32S3 peripherals (left) and pinout (right)
(click image to enlarge)

The USB-C Type-C (5V@10mA) port can be used for power and programming. The product page describes that there are three low-power modes available: Modem Sleep mode (~25.000 mA), Light Sleep Mode (~2.000 mA) and Deep Sleep mode (>14 μA).

     
XIAO ESP32S3 + antenna
(click images to enlarge)

As other products from the XIAO Series, the XIAO ESP3S3 only measures 21 x 17.5mm and it features the battery pads on the bottom of the board as shown above.

Specification listed for the XIAO ESP3S3 :

• Connectivity:
  • 2.4GHz Wi-Fi (~100 mA)
  • BLE 5.0 (~85 mA)
• I/O Interfaces:
  • 11x GPIOs
  • 1x 5V pin, 1x 3.3V pin, 1x GND
  • 1x User LED
  • 1x Wi-Fi/BT Antenna connector
• USB:
  • 1x USB Type-C
• Other Features:
  • 1x Boot button
  • 1x Reset button
  • 1x Charge LED
• Power:
  • 5V DC (via USB Type-C)
  • 4.2V Battery Input (50mA charging current)
• Mechanical:
  • 21 x 17.5mm

Further information

The XIAO ESP32S3 can be preordered for $7.49 from their online store. The product page indicates that this embedded device doesn’t include pin headers. Additionally, SeeedStudio mentioned that they will release a similar XIAO ESP32S3 variant with an integrated camera and microphone very soon.