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Troubleshooting: USB Hub Not Recognized
After you connect Zero4U to Raspberry Pi Zero, the blue LED should light up when
you power your Raspberry Pi Zero. If you connect USB device to the USB port on
Zero4U, the white LED should light up accordingly. If you type “lsusb” command in the
console, you should see the 4-port USB hub get listed:
What to do if your Zero4U (USB hub) is not recognized?
If you are mounting Zero4U on Raspberry Pi Zero, please make sure the
4 pogo pins
are all well contacted to testing pads
on the Raspberry Pi Zero. Use tweezers to
gently adjust the pogo pins if necessary.
Have you ever
enabled the “Ethernet Gadget” on your Raspberry Pi Zero?
(
tutorial is here
) The USB port on Raspberry Pi could work in either host mode or
slave mode. By default, the USB port is in host mode, which allows you to connect
Zero4U (a USB hub) to it; If you enable the Ethernet Gadget, the USB port is in slave
mode, and the connected Zero4U will not be recognized.
If it is the case, there are two solutions:
1. Disable Ethernet Gadget via Software
You can disable Ethernet Gadget by commenting out the “
dtoverlay=dwc2
”
in the
/boot/config.txt
file, and then reboot. As for the cmdline.txt file, you can
keep it as it is.
2.
Disable Ethernet Gadget via Hardware
You can also disable Ethernet Gadget by
connecting an OTG adapter
to the
“USB” micro USB port on Raspberry Pi Zero (not the power port). An OTG
adapter is something like this:
OR
