For those who have pets that stay in the RV when you're out running errands or just away from the RV without them I recommend the Govee WIFI thermometer. We've been using this for a couple of months now and love it. You do need WIFI internet for the WIFI to work but if you do it works great. Cheap piece of mind (less than fifty bucks).
https://smile.amazon.com/gp/product/B07FBCTQ3L/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
https://smile.amazon.com/gp/product/B07FBCTQ3L/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1