Ok I don't fully understand your reply, what do you mean by serial interface features? I only want to code in C/C++ not other languages. The commands are not the same as you write things like "Serial.println" instead of "printf" if that's what you're saying. I want to code the serial monitor to ask some questions which the user will answer, rather than just put in "on" or "off" - I want a proper interface. I have yet to see anybody that has done that on the internet to show me that it can be done.