To load a PWM overlay while Linux is running, execute the following commands in a terminal:
sudo dtoverlay pwm
sudo dtoverlay pwm-2chan
Use sudo dtoverlay -r pwm
to remove the single channel
overlay, or sudo dtoverlay -r pwm-2chan
to remove the dual
channel overlay.
Overlays loaded with dtoverlay
stay active until the
Raspberry Pi is restarted.
To load a PWM overlay at startup edit the file
/boot/firmware/config.txt
and add
dtoverlay=pwm
for single channel PWM, or
dtoverlay=pwm-2chan
for dual channel PWM. Restart the
Raspberry Pi to activate the overlay.