I want to integrate motion detection by tracking our Fitbit devices or other simple BLE devices, and send the signal strength to my home automation system (to HomeSeer via MQTT). Using 3 or 4 Receivers I can triangulate the position and get much more reliable data than just using PIR.
So the question is:
How can I find any BLE device in range?
(Also quick second question: What does a slow blinking green light mean?)