递归简单点来说，就是一个函数直接或间接调用自身的一种方法，它通常把一个大型复杂的问题层层转化为一个与原问题相似的规模较小的问题来求解。

适用于ESP32和ESP8266板、树莓派Pico的外壳3D模型

RP2040 Datasheet

In this book, we’ll look at how to get started with this hardware, and how to work with other electronic components. By the end of the book, you’ll know how to create your own programmable electronic contraptions.

The SDK (Software Development Kit) provides the headers, libraries and build system necessary to write programs for RP2040-based devices such as Raspberry Pi Pico in C, C++ or Arm assembly language.

This book is about the official MicroPython port for RP2040-based microcontroller boards.