Hi @Scott_Chapman,
Did you think about battery mofying the presence sensor. I use mine for my car and my dad’s truck. So I know when they come and go. There is a thread about that and it makes the battery swapping problem a lot easier and cheaper.
Check this thread out. I posted my project there too:
https://community.smartthings.com/t/presence-sensor-battery-upgrade/79737/24?u=lmosenko
My post:https://community.smartthings.com/t/presence-sensor-battery-upgrade/79737/36?u=lmosenko