Is there a way of using Bluetooth as a proximity sensor that works quickly? My use case is that I want to have my condo door unlock when I am nearby. I have not been able to get Bluetooth tiles/locators to work. And wifi is usually slow at connecting. And if the solution involves taking my phone out of my pocket and turning it on, then that is not good. I can just punch in the PIN for my door lock instead. I want it to happen with my phone in my pocket and me nearby, as in 10 feet or up to 50 feet.