I am currently building a remote controlled car and since I am not able to code the Arduino with c++, I use Pyfirmata to convert it to Python code. The problem is, that the Arduino is not storing the data on itself anymore, and I can't unplug it from my PC. That is making it impossible to implement it in a remote-controlled car. It is not working on itself, but needs the PC connected. I also got a battery connected to the Arduino so it should work if the Arduino would know what to do.

I tried to disconnect it from my PC and thought it was memorizing the code, but it didn't. Anyone got an idea on how to fix this?