The programming language "Python" has experienced an enormous upturn in recent years. Last but not least, various single-board systems such as the Raspberry Pi have contributed to their recognition. Python has also been widely used in other areas, such as artificial intelligence or machine learning. It is therefore obvious to use Python or the "MicroPython" variant also for use in SoCs (Systems on Chip).Powerful controllers such as the ESP32 from Espressif Systems offer excellent performance, Wi-Fi and Bluetooth functionality at an affordable price. With these features, the maker scene was conquered by storm. Compared to other controllers, the ESP32 has a much larger flash and SRAM memory, as well as a much higher CPU speed. Due to these features, the chip is suitable not only for classic C applications, but also for programming with MicroPython.This book introduces the application of modern one-chip systems. In addition to the technical background, MicroPython itself is the main focus