Materials: Romu board, PC with free USB-A port, IDE (Thonny or VS Code). 2. Port check: Identify a standard USB-A port on your computer. The Romu board is designed to plug directly into this connector without an intermediate cable. 3. Insertion: Hold the board by the edges to avoid electrostatic discharge. Insert the board into the USB-A port until it is firmly seated. The RGB LED on the board should light up briefly, indicating that power is correctly established. 4. System detection: On Windows, open Device Manager. Under 'USB Serial Controllers' or 'USB Bus Devices', you should see a new serial interface device (often named 'Pico' or similar). On Linux, type 'ls /dev/ttyACM*' in a terminal. On macOS, check via 'system_profiler SPUSBDataType'. 5. Port selection: In your IDE, select the serial port corresponding to the Romu board. If no port appears, ensure the board is properly inserted and try another USB port. 6. Communication test: Open the serial terminal in your IDE. If the connection is successful, you should be able to run basic MicroPython or C++ commands. This step validates that the RP2354A microcontroller is operational and ready for development.