Android USB ports changing

[stan4000]

Hi,

I am hitting an issue where after plug/unplug USB cable or after reboot the USB path is changed:

For example permiting access to /dev/bus/usb/001/002 and after reboot the communication is not working anymore.
Deleting the added USB device, re-applying it and it pops up with /dev/bus/usb/001/007.

When I am using the app in sever mode this makes it impossible to auto connect to the same printer .
Could it be possible to have some range of ports or to summarize them so the USB signal can try all of them until some respond?

[deakjahn]

This usually happens if you give a temporary permission to the app rather than a permanent one (also called default in some phones).

[nitincodery]

I am unable to start server, is there any video or guide to setup server mode correctly, I am also facing the same issue, I need to share it via IPP/CUPS mode, I couldn't set it up, the printer is not available on localhost and there's no option to mention IP address manually?

[nitincodery]

I also requested refund, but it got rejected, I wanted to try server mode, but it isn't working and refund also got rejected :/

[deakjahn]

@nitincodery I sent an e-mail about the refund.

We have a full, illustrated guide at https://netprinter.app/help.html, also available from the Settings page, but this is generally about the app, server mode is just one section in it.

You may misunderstand it, though: in server mode your phone becomes the print server. As such, you can't decide your IP manually or otherwise, it will be the same IP that your phone normally receives from your network. What you can specify is the port. There's really nothing else to set up, you specify the protocol you want the server to accept (IPP in this case, probably), the port (because IPP normally uses 631 and Android doesn't allow ports below 1024 for user apps, I'd suggest 1631 for simplicity but it could be any free port above 1024, actually).

When you have server mode running, the IPP server will be available at your phone's IP address, at port 1631 (or whatever you chose), it should be that simple.

[nitincodery]

Ok I'll try again, and the app is really amazing I have no complaints about it, sorry it went that way. I'll give it another go, and let you know.