Here is the connection problem I am having. Six Reolink E1 & E1 plus installed on my router set 10.0.0.1 with no problems. But purchased Reolink Argus PT/Solar & won't connect. My router is set to 10.0.0.1 . So I took this camera to Router set to 192.168.1.1 & it easily connected. (both routers are Netgear) There is a difference in the Reolink Argus PT. (the E1 also connected to both the 10.0.0.1 & 192.168.1.1) I am awaiting for reply from support.
I'm no expert when it comes to router settings, but since you said "took this camera to Router set to 192.168.1.1 & it easily connected" I assume there is a reason why you could not leave the router set to 192.168.1.1 is that correct ?
I am asking because a short while back I switched from an old ASUS router to a new Netgear router and have not been able to get my Reolink Argus PT cameras to reconnect. I have other brands of WIFI cameras that reconnected easily so it makes me feel it is a problem with Reolink and not my router but that is just a guess and I have been doing a lot of research but still no solution.