I have unfortunately also the error “502 Bad Gateway” after a restart of the camera it functions again. unfortunately not long, (sometimes 1 hour) then the same error is again there. I already had contact with reolink by email. I was told that it is a bug in the firmware. it should be fixed in the next version. unfortunately I have not much hope after I have read here in the forum.
Since it doesn’t seem that Reolink is going to provide any documentation, I’ve started documenting some of the API that I could find via ethernet sniffing the http web client on an RLC-410-5MP. Please have a look at the following thread.