# Firmware

## Expected Behavior

- Configure PWM on selected GPIO.
- Sweep duty cycle from low to high.
- Optional: print current duty cycle to serial.

## Physical Test Procedure

1. Start with low duty cycle.
2. Observe LED brightness.
3. Measure average voltage for several duty cycles.
4. Record whether visual brightness matches expected trend.

## Code

TODO: добавить PWM firmware после выбора workflow.

## Actual Result

TODO: записать фактическое поведение.