STs motion sensors used outdoors in protected entry areas

The question of what motion sensors to use outdoors is a good one, in fact you’ll probably find a dozen or more threads in the forums discussing it already. :sunglasses:

If you want a quick answer take a look at the following:

If you want an in-depth detailed discussion, see the FAQ:

As far as the ring doorbell, there is an official integration:

https://support.smartthings.com/hc/en-us/articles/214288206-Ring-Doorbell