You most certainly can. I have been doing this with my Moto 360 2nd gen and it works great. Unfortunately it turns out I hate sleeping with something on my wris

You most certainly can. I have been doing this with my Moto 360 2nd gen and it works great. Unfortunately it turns out I hate sleeping with something on my wrist, so I don't do it anymore. It also slowly turns on my smartlights when the alarm goes off.