To all those asking, this is the PAD I selected, runs HA perfectly with Android App.
I use this for wall mount:
https://www.amazon.com/dp/B000WVXX2E?psc=1&ref=ppx_yo2ov_dt_b_product_details
Because I have power, I put in a 2-gang box about 10" higher on wall than normal light switches above the light switch so easy to pull power. In that box I have one USB charging outlet and a blank side. I use the blank side of the wall plate for the mount (instead of just going into the drywall).
Here is one ready for installation.
The only thing I will change out would be the small, short USB cable. I am looking for one the goes 90 degrees backwards for a cleaner look. Like this:
Please note that I do not use mine ethernet connected, all of them are wireless. Hence I have not tested with any PoE adapter.