I am using node-red-node-gpio (version 2.0.6) to control the brightness of a LED that is attached to my raspberry pi 3. When I set the brightness to a low value (e.g. 6 (6%)) then the LED flickers. I would not expect this flickering - the LED should appear as it is shining with a constant low brig…

The solution: run pigpiod daemon Assure you are running it with option -t 0 otherwise this may break audio (see above comments in this thread). I ran it as a service so I have to specify the option -t 0 in /etc/systemd/system/pigpiod.service.d/public.conf run the deamon on the host, not in …

Controlling LED brightness using node-red-node-pi-gpio with pwm results in flickering

Core Development

jbudd 30 September 2023 10:42 6

Apparently pigpio PWM uses DMA.
https://www.js4iot.com/2021/06/04/DMA_PWM-PIGPIO.html

@dceejay says he expects GPIO nodes to stop working (presumably when RPiOS is updated for the Pi 5) https://discourse.nodered.org/t/raspberry-pi-5-announced-today-available-oct-23/81656/5 so it looks like switching to node-red-node-pi-gpiod is essential.

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Controlling LED brightness using node-red-node-pi-gpio with pwm results in flickering

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