Raspberry Pi Bluetooth Speaker: Play Audio Wirelessly using Raspberry Pi
GitHub - RuckerGauge/Raspberry-Pi-Zero-W-Bluez-5.50-upgrade-steps: Steps for installing Bluez version 5.50 on Raspberry Pi Zero W for setup as a Bluetooth Low Energy Peripheral.
The Bluetooth Technology for Linux Developers Study Guide | Bluetooth® Technology Website
Starting with Bluetooth LE on the Raspberry Pi - Homepage von Michael Haugk
Install bluez on the Raspberry Pi | Adafruit Learning System