I have a first generation (2012) Nexus 7 running Android 5.0. There is a screen cast feature in the popup settings, but when I try to setup my Chromecast it is not working and cannot detect it. Does this device support screen casting?
According to an article from July, the first gen Nexus 7 does not support screen casting to the Chromecast.
That information MIGHT be out of date but as of four months ago, the 2nd gen (2013) was the only Nexus 7 that was supported for screen casting