Okay. I will try it the way you said and see how it goes?If 'POWER_OFF_ON_HALT=1' is set then 3.3V will be switched off at shutdown. You can toggle this via 'raspi-config'You're right. The Pi5 still supplies power to the 3.3V rail after a clean shutdown. To fully cut power, you'd need an external circuit or smart power switch that turns off power from the source after shutdown.I got a Pi5 that I'm going to use as a small NAS. I got all working except the poweroff behavior.
I have connected a LED to the 3v3 header pins and I have noticed that if I do a hard poweroff holding the power button it turns off but if I do a clean shutdown with a single button press or using poweroff/shutdown commands it stays lit, so I assume the pi is still powered.
gunspin
Is it possible to perform a full power down with a proper clean shutdown?Code:
sudo raspi-configAdvanced Options -> Shutdown Behaviour -> Full power off
Statistics: Posted by Facquale49 — Tue Jun 17, 2025 6:33 am