Ahmad finally closed Proteus at 4:30 AM. The "MPU6050 Proteus Library" wasn't just a file he downloaded; it was a compromise. It wasn't a perfect physics engine, but a behavioral model that required specific firmware to function.

Quickly set temperature to -10°C and check if your code's bias correction algorithm activates.

He watched as his PID algorithm in the Arduino model reacted, sending PWM signals to the virtual motor drivers. The numbers on the screen shifted, correcting the tilt.