The Raspberry Pi Pico is a powerful microcontroller board designed specifically for physical computing, i.e. hardware-based applications. The Raspberry Pi Pico can be programd to perform a single task very efficiently, enabling fast real-time control and monitoring applications. The Pico, as we call it, is based on the fast, efficient and cost-effective Dual-Core ARM Cortex-M0+ RP2040 microcontroller chip, which runs up to 133MHz and has 264KB SRAM and 2MB flash memory. In addition to the large memory, the Pico has other attractive features, including a large number of GPIO pins and common interfaces such as ADC, SPI, I²C, UART and PWM. To top it off, the chip offers fast and accurate timers, a hardware debug interface and an internal temperature sensor.The common high-level languages such as MicroPython or C/C++ can be easily used for programming. This book is an introduction to using Pico with the MicroPython programming language. The Thonny development environment (IDE) is used in a