UUGear MEGA4 USB Hub

MaasPower has been tested with this device. It can power and control 4 Raspberry Pi 4’s. Other USB powered SBCs should also work.

This board is designed to be mounted on top of a Raspberry Pi and controlled by it. However I used a USB extension cable with type A socket to connect it to the back of my NAS.

A suitable power supply is required to be plugged into the USB C port (J5). For details of power supply choice [see here](https://github.com/gilesknap/IaC-at-home/blob/main/nas/03-maas/PowerSupply.md)

The usb hub control utility here works well https://github.com/mvp/uhubctl. See the github repo for details on compiling this utility.

On linux you need to enable permissions using the device’s vendor ID. The following steps will enable access:

sudo vim /etc/udev/rules.d/52-usb.rules
# add the following line
# SUBSYSTEM=="usb", ATTR{idVendor}=="2109", MODE="0666"

sudo usermod -a -G dialout $USER
sudo udevadm trigger --attr-match=subsystem=usb

The commands you will need are as follows:

# turn on port 3
uhubctl -a 1 -p 3

# turn off port 3
uhubctl -a 0 -p 3

# get status for port 3
uhubctl -p 3

# for query use this regex for 'on'
# .* power
# for query use this regex for 'off'
# .* off