almost all localName's undefined on Raspberry Pi zero W Raspbian Lite and MacOS 10.15.4 (Catalina)

[diederikfeilzer]

I consistently get an undefined localName variable. Im running node version 8.9.0 on a clean install of raspbian, + node version 10.14.1 on Mac OS 10.15.4. The dependencies are in order. Some companies do return this value consistently: Sennheiser Communications A/S, LG Electronics and TomTom. Then Google, Microsoft, Tesla Motors and Apple, Inc. devices won't return a localName. Manufacturer is inferred from first 4 bytes of manufacturing data.

[gleeds]

This is just a theory, but other BLE libraries I have used have the concept of "Active Scan", which if you enable sees to get better results for localName. My theory is that some BLE devices always broadcast their presence with the localName populated, while other devices only broadcast their full info when they receive a probe.

https://github.com/nkolban/ESP32_BLE_Arduino/blob/master/src/BLEScan.cpp#L152