The Onion PWM Expansion Python module, `pwmExp` is based on the [C PWM Expansion Library](./PWM-Expansion-C-Library). Using this module, you will be able to control the PWM Expansion from within your ...

While the script is running, the fan stays off, as expected (writing 0 would enable it). However, when the script finishes, the fan suddenly turns on! I don't know why the pwm would suddenly activate.