I tried using my new 6dD MKII and I had issues. I was using my photo booth solution. The WPS-pro1, Dnp printer DS620A printer.
I ran the wifi app. I connected my camera to the iPad and the iPad on the wps pro1 network. The problem I had was I couldn’t connect to 2 things at once on the WPS pro1. So if the camera was connected to the iPad for photos the printer was not connected even when it was through the usb cable. I restarted everything. Got the printer connected to the WPS pro1 but the camera wont connect while thats happening. I couldn't even connect with my phone to run blueprint. So I ended up ditching the printer for the evening with a sad Bride and Groom

I would try to ask DNP for support but I think they would be clueless. I am thinking maybe its just cause its a new camera. On another note the 6dii is blazingly fast with the live view preview on app
Todd