[USB hub not working on OdroidC2]

Hi Guidol,
Thanks for replying.
I am not using an external usb-hub rather the usb-hub of the odroicdc2. 
None of the USB peripherals connected to the ports o f the hub are detected by the OS. 
I tried connecting a barcode scanner and a ZTE USB modem. None of them were detected in lsusb.

Thanks
Sumit

[USB hub not working on OdroidC2]

Hi,
Can anyone please help me with this issue?

Thanks in advance.

Sumit

[USB hub not working on OdroidC2]

Hi @TonyMac32,
Thank you so much for replying.
This is the link to the output of  `armbianmonitor -U` : https://pastebin.com/7VS5BzZ4
Couldn't upload debug info using

armbianmonitor -u

as the usb hub is not working I couldn't connect the device to the internet through USB Modem.

Thanks again.
Sumit 

[USB hub not working on OdroidC2]

I used a stable Armbian Image (Armbian Stretch mainline kernel 4.18.y) for OdroidC2. The OS booted up normally but the USB hubs didn't detect the connected peripherals. The output of `lsusb` didn't show any of the connected peripherals.

Thanks
Sumit

[Which service shows orangepi zero as a usb device on a host PC]

Solved the problem (edited)

Disabled usb gadget service of orangepi zero
`sudo  /sbin/rmmod g_serial`  (edited)
then 
 `sudo bash create-gadget.sh` 
link to solution: https://vjordan.info/log/fpga/nanopi-neo-usb-otg-with-armbian-mainline-4x-kernel.html

 

after `rmmod g_serial` , it can be verified on the host pc by `lsmod`.

 

On the orangepi:
 `ls /dev/hid*`  lists the hid device ports (hidraw1, hadraw2 ... ) and gadget port (hidg0)

 

 

[Which service shows orangepi zero as a usb device on a host PC]

I want to load my custom service to show orangepi zero as three devices on the host PC. But as the UDC  ( /sys/class/udc/musb-hdrc.1.auto) is being used by another service which is probably the builtin service using udc to show orangepi as:
 

Bus 001 Device 048: ID 0525:a4a7 Netchip Technology, Inc. Linux-USB Serial Gadget (CDC ACM mode)  

 I want to disable that service so that my custom service can use the UDC for the required purpose.

 

This is the command:

echo "$(ls /sys/class/udc/)" > UDC

 

and this is the error:

echo: write error: Device or resource busy

 

"ls /sys/class/udc" has the file musb-hdrc.1.auto

 

and UDC is in the folder /sys/kernel/config/usb-gadget/< custom name>/    ,   which is created using a bash script

 

Regards,

Sumit