Hi, since I upgraded from a hub 5 to a smart hub 2 my HP printer thinks is offline. HP think it may be because the smart hub 2 is broadcasting 5g and their printer is expecting 2.4. Everything else (including my old iphone 6s which I'm pretty sure does not accept 5g works fine from the new hub so I'm guessing that HP have it wrong and the smart hub is not broadcasting in 5g? Printer was printing but now has decided it wont until I connect it to the internet (that it is already connected to).
did you reset the printer after installing SH2?
you need to get printer to forget your HH5 SSID and then in printer setup find the new SSID of the SH2 and try and connect then enter the wifi password and see if that connects to hub
I avoid your problem by changing new hub SSID to that of previous hub and use same password and that way my wifi devices just connect when hub boots up