The forum can guess or you can provide the model of Epson and how you are attempting to interface.
If you have all 3 options, the first is the fastest followed by the last.
I have the Epson Stylus NX420
trying to connect via wifi
its not obtaining a IP from router.
ive reset to default on printer and ive restarted the router
If wifi is your only option - Looks like it likes 2.4ghz wireless. What are your 2.4ghz wifi settings?
If you want to compare settings below are my settings that work (I only have IoT devices on 2.4ghz). The only unusual thing is I have a couple neighbors so I set a RTS threshold (you don’t have to do that)
Using a dhcp assigned IP can be problematic in printers. Typically, if the IP gets changed, the printer configuration on your computer may need to be deleted and reset. You can avoid this one of 2 ways. MAC reservation or static IP. Can you try reserving a MAC address?
Not sure how
But I did delete all drivers and software on computer then restored printer to default settings (erased network settings)
Also deleted the printer from static on router
I am 100% with @shep on this one. DHCP reservation is a good way to go for a printer.
Out of curiosity @Jr_lefty, assuming your printer is 2.4Ghz and your 2.4Ghz radio is wlan1 on your R7800, do you see your printer's MAC access show up in the output of this command once your printer indicates it's connected to wireless?
In your config wifi-device 'radio1' block, I would try adding this line: option legacy_rates '0'
Secondly, in that same config block, channel 3 is not an ideal 2.4Ghz channel. Under almost all circumstances, you will want to pick either channel 1, 6, or 11 depending on which one has the least presence from neighboring APs. So run a channel scan and see which one of those three channels has the least interference and set that channel instead of option channel '3'.
I dont know this printer, but have you MPF (Managment Protection Frame ) active?
If so maybe your printer dont support this feature at all. I had similar problems with an old tablet, which only worked if mpf was deactivate.