I saw in another thread that people don’t have luck with waveshare io board, I tried the methods in the thread and nothing seems to work. I tried to ground pin 101 as well but it didn’t help for me.
I’ve tried the same CM3 on:
Waveshare CM4 to 4B adapter
Spotpear CM4 to 4B adapter
Piunora & Piunora lite
Radxa CM3 io board
The only device with working usb is Radxa CM3 io board. Does anyone have any success outside of Radxa devices? I tried both linux and android images.
If you use the cm3-io images from here :
you can enable usb with a little trick
connect to it via ssh and do this :
wget openhdfpv.org/wp-content/BaseImages/usb.service
chmod +x usb.service
systemctl enable usb
this will install a service which will enable usb on each boot.
The newer images : https://github.com/radxa-build/radxa-cm3-rpi-cm4-io
won’t work with that hack
Not sure if I’m doing anything wrong but I tried the images from debos-radxa and still does not work. It looks like the usb services just runs the otg_mode setting.
That’s all that is needed (at least on my board)
You can also do the solder way, it’s discribed here 
CM3 + CM4-IO-BASE-B(Waveshare)
I just want to report back that I had to switch to CM4 dtb as per instructions of the newer repo after installing from debos-radxa repo. I’m just glad I don’t have a paper weight.
Hi Raphael,
I’ve tried the method you said but when doing systemctl enable usb, the message that I’m getting back is the following:
==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-unit-files ===
Authentication is required to manage system service or unit files.
Authenticating as: rock, (rock)
Password:
==== AUTHENTICATION COMPLETE ===
Failed to enable unit: Unit file usb.service does not exist.
I’m using the following image radxa-cm3-io-debian-bullseye-xfce4-arm64-20230201-1123-gpt.img.xz
Glad is someone can help me with this topic.
Many thanks,
Regards.
try
sudo systemctl enable usb
Hi Raphael, same output. Failed to enable unit: Unit file usb.service does not exist.
long time ago where I wrote the post 
.. let’s do it this way:
sudo -s
cd /etc/systemd/system/
wget http://openhdfpv.org/wp-content/BaseImages/usb.service
chmod +x usb.service
systemctl enable usb
this should work