Hi Guys,

Long time lurker of this excellent forum but now looking for a bit of advice if you don't mind,

I'm running Astroberry/Ekos on a Rpi 4b and have been trying to control a servo actuated flap via Servoblaster using the instructions here... www.indilib.org/support/tutorials/165-di...e-cover.html?start=1
I just can't seem to get any response from the servo other than the occasional hum or jitter. I have an oscilloscope and can see that there is PWM control from GPIO pin 17 however the PWM seems unstable.
I tried running the same software setup and settings on an old Rpi 3b and it works ok on that, albeit a bit jittery.

Any ideas? am I missing something extra that's required for it to run on Rpi4?


Many thanks,

Rich

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