BT5.1 - Direction finding and positioning with BLE

Angle of Arrival (AoA) / Angle of Departure (AoD)
The latest version of the Bluetooth Standard (5.1) was official adopted on 21st January 2019, with the most significant development being the “Angle of Arrival/Angle of Departure” feature. In simple terms, this allow one device to find the angle from which another device is transmitting.