I would like to make Orangepi zero to  capture USB output destined for a printer in order to log the output from a system. 

1 ) Mimic the connected USB printer (so that the machine thinks it still has the original printer attached)
2 ) Capture the output from the machine
3 ) Send the captured output to the printer.

 

 

 

1 hour ago, Deepu S said:

capture USB output destined for a printer

You have to start here: https://www.kernel.org/doc/html/v5.3-rc3/usb/gadget_printer.html

After you've done this, just write something to /dev/usb/lp0 on the host side, again just a standard file. Simplest would be to echo "asdf" >> /dev/usb/lp0 Take care of the permissions for both files, you need your user to be in the lp group and have write permissions.

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