Nano 33 BLE – BLE stuff

Some notes about using BLE.

Implementing file transfer over BLE
* https://www.silabs.com/community/wireless/bluetooth/forum.topic.html/how_to_send_filefrombledevicetophone-SCsx

Silabs: Bluetooth Knowledge Base Article List

Silabs: KBA_BT_0903: SPP-over-BLE example