MMM-PIR-Senor shut off usb port(s)

shgmongohh

Hello,

I think it would be nice, if the usb port is shut down, when the monitor turns of. I have some speakers on my MM via usb and they make some noise. When it is still in the night you can hear it.
It it possible to cut of the energy supply to one or two usb ports?

Sebastian

jc21

From the quick googling I’ve done, it may be possible to disable/enable raspberry pi usb power with commands:

Disable

echo 0x0 > /sys/devices/platform/bcm2708_usb/buspower

Enable

echo 0x1 > /sys/devices/platform/bcm2708_usb/buspower

However I haven’t tested. I’d recommend writing a new module that handles this and listens for the USER_PRESENCE event notification that the Pir module triggers.