Probably Bluetooth 5.1 with AoA/AoD extensions for direction finding, now that it's standardized. You can expect similar functionality in the next Android versi

Probably Bluetooth 5.1 with AoA/AoD extensions for direction finding, now that it's standardized. You can expect similar functionality in the next Android version, as soon as the API is defined by Google... https://www.silabs.com/products/wireless/learning-center/bluetooth/bluetooth-direction-finding https://www.silabs.com/products/wireless/learning-center/blu... Note: ultra-wideband U1 chip is not suitable for general tag finding, as it requires practically uninterrupted line-of-sight because of the very high frequencies.