This is a MicroPython board You can get started right away by writing your Python code in 'main.py'. For a serial prompt: - Windows: you need to go to 'Device manager', right click on the unknown device, then update the driver software, using the 'pybcdc.inf' file found on this drive. Then use a terminal program like Hyperterminal or putty. - Mac OS X: use the command: screen /dev/tty.usbmodem* - Linux: use the command: screen /dev/ttyACM0 Please visit http://micropython.org/help/ for further help.