The Adafruit WCH CH9102F Friend – USB to Serial Converter is a compact and dependable USB-to-UART interface board designed for programming, debugging, and serial communication with microcontrollers and embedded systems. Built around the WCH CH9102F chipset, it offers stable performance and broad OS compatibility, making it a reliable alternative to traditional FTDI-based converters.
This board supports both 3.3V and 5V logic levels, allowing it to work seamlessly with popular platforms such as Arduino, ESP8266, ESP32, RP2040, STM32, and other UART-based devices. The “Friend” form factor provides clearly labeled pins, making wiring and breadboard connections simple and error-free.
