SoftSerial: Software UART

This article explores the implementation of a software UART on microcontrollers, a solution that becomes indispensable when hardware ports on a development board are occupied or unavailable. The author explains how to organize data transmission via GPIO, enabling a full-fledged shell terminal for debugging even on hardware with limited resources. Software UART is a flexible tool for embedded systems developers, allowing debug information to be output without the need for additional hardware modules. The article is useful for engineers facing a shortage of peripheral interfaces during electronics development. A detailed implementation guide and tips for code optimization help to quickly establish communication with the target device in the field.