Raspberry Pi Pico

Behold!

https://github.com/raspberrypi/pico-sdk/­releases/tag/1.5.0

Bluetooth Support for Pico W (BETA)

Key changes:
The following new libraries are provided that expose core:

BTstack functionality: pico_btstack_ble - Adds Bluetooth Low Energy
(LE) support. pico_btstack_classic - Adds Bluetooth Classic support.
pico_btstack_sbc_encoder - Adds Bluetooth Sub Band Coding (SBC)
encoder support. pico_btstack_sbc_decoder - Adds Bluetooth Sub Band
Coding (SBC) decoder support. pico_btstack_bnep_lwip - Adds Bluetooth
Network Encapsulation Protocol (BNEP) support using LwIP.

and more!