​The Seeed Studio XIAO series comprises a collection of thumb-sized, high-performance microcontroller units (MCUs) designed for space-constrained projects. These boards are compatible with popular hardware platforms such as ESP32, RP2040, nRF52840, and SAMD21, making them ideal for applications in Tiny Machine Learning (TinyML) and Internet of Things (IoT) projects that require wireless connectivity. Despite their compact size, measuring just 21×17.5mm, XIAO boards offer powerful processing capabilities and a rich set of interfaces, making them suitable for wearable devices, small robots, and other miniaturized projects