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Added PWM support, both hardware and software.
For hardware support it needs this inside /boot/firmware/config.txt:
dtparam=audio=off
dtoverlay=pwm-2chan
I added a new class in utils (_HwPWM with the singleton hwpwm) in file pwm_hardware.py
It allows checkings of hardware pwm capabilities and settings.
gpio.py is modified to check if hardware pwm is available and, in case, use it.
A route is also added for lights:
@router.put("/{light_name}/intensity", response_model=LightStatusResponse)
value is from 0% to 100%. Frequency is preset in config file.