Nowadays MicroPython is becoming one of the most popular programming tools for embedded systems. MicroPython allows you to control hardware connected to the MicroPython board, write code modules expanding the features of your program, store them on an SD card for later use, and much more. MicroPython comes with modules for interacting with the hardware such as interrupts, timers, LEDs, ADC, DAC, PWM and other peripherals.Virtually MicroPython allows you to gain complete and direct control of the hardware, but in practice many essential capabilities of MicroPython remain unused. This book aims to cover many hidden aspects of hardware control and code optimization for the popular boards based upon the STM32F4xx microcontrollers.This book is not for absolute beginners. It is assumed that you already have some experience and practical skills in MicroPython programming and understand the basics of Cortex-M CPU. The material of this book will also be useful for those who want to understand how the Cortex-M peripherals such as I/O ports, Timers, Analog-To-Digital and Digital-To-Analog converters work.The book contains over 80 code examples and numerous tips that may help the readers in designing measurement and control applications in MicroPython. The book is written by the professional embedded engineer experienced over 20 years in designing embedded systems.