Use OpenWRT (on Xiaomi Mini Wifi) as Printer Server for HP LaserJet 1020

Objective:
To share my HP LaserJet 1020 on my network without keep my computer on.

Issues:

1. The HP 1020 uses host based software.  On every power on, it need to download the software from the computer via USB in order to work properly.

Steps:

1. Install below packages
1. kmod-usb-printer
   p910nd
   luci-app-p910nd
    
2. Connect printer
3. Check device path (/dev/usb/lp0)
4. create hotplug script (to download firmware on each power on).
5. download firmware and save to the OpenWRT.
6.  Setup Windows driver
1. No bi-directional

Unresolved issue:

1. If the router reboots but the printer did not, the firmware will be download again to the printer and causing an error.
2. Cannot handle manual double page printing.

References:

1. Upsangel
2. OpenWRT p910nd page
3. Chau Chee Yang Technical Blog