ATX PSU always on

ROCK 5 Series 5 ITX/ITX+
21

The ATX power supply starts when the green wire is connected to ground. Radxa decided to connect it to ground permanently. Without cutting the resistor from the board, or cutting the wire from the cable, there’s no way to shut it down.

But if you cut it, then you need a way to reconnect it to ground for power up and keep it that way for as long as the system is on. That’s why it’s so complicated.

So, AFAIK, there’s no simpler method than the Tasmota smart plug. Just run this during shutdown:

wget -q -O- http://tasmota_ip/cm?cmnd=backlog%20delay%20300%3Bpower%20off

And you can use the same smart plug to turn it on remotely, reset it if it hangs, etc.

1 Like
22

I operate my various devices with such a power supply, and due to the low ‘no load power consumption’, continuous operation of the power supply is not a problem. When the SBC is shut down, the power supply automatically goes into standby mode.