Ever wanted to build own electronic devices? Would you like to connect them to other devices or a computer? Easiest way to achieve this is to use microcontrollers and RS-232 serial port. This book shows how to design own circuits based on AVR and STM32 microcontrollers and how to program the chips. You can learn how to handle serial transmission on microcontrollers and on a PC. The book contains practical examples and many useful tips. Hardware and software tools are described in details. There is also much information about RS-485, and serial-to-USB adapters. Presented projects give practical knowledge about not only serial communication but also topics such as LED displays, LCDs, Bluetooth, and RC-5.