I have an HP OfficeJet Pro 8210 which drops offline - sometimes, maybe. 8210 is CAT5 connected to Apple Airport Extreme.
By that I mean leaving 8210 on always means that it sooner or later goes off line. Then I have to recycle 8210 power to revive connection. The connection is more reliable if macOS is running, which is not always so as office Macs/PCs are turned off after hours.
Which defeats the purpose of having 8210 always available to other connected (e.g. macOS Sierra) and wireless (e.g. iPhone 6S).
I also have HP LaserJet P2055dn which, until HP issued new iOS app, could also be used as wired/wireless always-on printer.
So, any ideas how to keep 8210 always on and available (using new HP AiO Remote App) to all devices on local network? Seems current HP ePrint App is to be discontinued.