Recently I had to buy a new printer, and I didn’t have time to do any real research on what I wanted, so I bought one of HP’s low-budget all-in-ones, the HP DeskJet 3755. Currently this printer is selling for less than $100.
Setting this printer up on WiFi has been more complicated than I expected. I have never had any real difficulties in setting up a printer on the HP Smart app before. My Asus router has both the 2.4 GHz band as well as the 5 GHz band. I’ve always operated both bands using the same SSID and password, and it’s never been a problem before. However, since the 3755 model does not support the 5 GHz band, it always picks the 2.4 GHz network.
It appears that devices on the 5 GHz network cannot consistently see those on the 2.4 GHz network even though AP isolation mode is disabled. This problem may not exist for routers made by other manufacturers, or maybe even other Asus models.
By turning off the 5 GHz band, my Mac, iPhone, and the printer can now see each other, and I was able to set up the printer in HP Smart.
I have no requirement to turn the 5 GHz network back on at this time, but I will continue to see if there is a way to allow the two networks to see each other.