Seeed XIAO ESP32S3 – Tiny Board, Big Performance

By Lee – LY Repairs

Every now and then I come across a piece of hardware that genuinely impresses me, and the Seeed XIAO ESP32S3 is one of those products. Despite being one of the smallest development boards I've worked with, it delivers performance that rivals much larger boards while consuming very little power.

As someone who enjoys repairing electronics and building custom projects, I appreciate hardware that's both reliable and easy to integrate. The XIAO ESP32S3 ticks those boxes perfectly.

First Impressions

The first thing that stands out is just how incredibly compact the board is. Measuring only 21 x 17.5 mm, it can fit almost anywhere, making it ideal for embedded electronics, wearable devices and projects where space is limited.

The build quality is excellent. The USB-C connector feels robust, the PCB finish is clean, and all the components are neatly laid out. It gives the impression of being a premium product rather than just another inexpensive development board.

Performance

Powered by Espressif's dual-core ESP32-S3 processor, this tiny board packs plenty of processing power.

Key specifications include:

  • Dual-core Xtensa LX7 CPU running up to 240 MHz

  • Integrated Wi-Fi and Bluetooth 5 LE

  • USB-C programming and power

  • Excellent low-power operation

  • Plenty of GPIO for sensors and peripherals

  • Built-in support for AI and machine learning applications

  • Compatible with Arduino IDE, PlatformIO and ESP-IDF

Programming the board is straightforward, and I've found uploads to be consistently reliable.

Why I Like It

What really makes this board stand out is its versatility.

I've found it suitable for:

  • Home automation projects

  • Environmental monitoring

  • Wireless sensor networks

  • Smart repair tools

  • Portable electronics

  • Robotics

  • IoT prototypes

  • Custom controllers

The wireless performance has been solid during testing, with stable Wi-Fi connections and responsive Bluetooth communication.

Excellent Power Efficiency

One of the biggest advantages is its low power consumption.

If you're designing battery-powered devices, this board is an excellent choice. The ESP32-S3 sleep modes allow projects to run for extended periods on battery power, making it ideal for remote monitoring systems and portable electronics.

Development Experience

Programming with the Arduino IDE couldn't be much easier. After installing the ESP32 board package, the XIAO ESP32S3 was recognised without any issues.

The onboard USB-C interface makes flashing firmware quick and hassle-free, and I've experienced no stability problems during development.

Documentation from Seeed Studio is clear, and there's a large online community producing libraries, tutorials and example projects.

Build Quality

As someone who repairs electronics daily, I pay close attention to manufacturing quality.

The XIAO ESP32S3 scores highly thanks to:

  • High-quality PCB manufacture

  • Well-positioned USB-C connector

  • Clean soldering throughout

  • Reliable component layout

  • Compact yet durable design

It feels like a professional-grade development board rather than a budget compromise.

Final Thoughts

The Seeed XIAO ESP32S3 proves that great things really do come in small packages.

It combines impressive processing power, dependable wireless connectivity, excellent power efficiency and outstanding build quality into one of the smallest development boards available.

Whether you're creating IoT devices, automation systems, wearable technology or experimenting with embedded electronics, this board is well worth considering.

Overall Rating

⭐⭐⭐⭐⭐ 5/5

Pros

  • Extremely compact design

  • Fast dual-core processor

  • Reliable Wi-Fi and Bluetooth

  • USB-C connectivity

  • Excellent power efficiency

  • Great build quality

  • Easy to program

  • Strong community support

Cons

  • Limited GPIO compared to larger ESP32 development boards

  • Small size can make soldering headers a little fiddly for beginners

My Verdict

The Seeed XIAO ESP32S3 has become one of my favourite microcontroller boards. It offers an outstanding balance of size, performance and reliability, making it ideal for both hobbyists and professionals. It's the kind of board I keep reaching for because it simply works and fits into projects where larger development boards cannot.

LY Repairs Rating: ⭐⭐⭐⭐⭐ (5/5)