The homeassitantbluetoothspeaker from adrgumula

The goal of this tutorial is to pair arbitrary bluetooth speaker with the Home Assistant (HASSO) to be able to hear notifications & TTMs

Proxmox
BT dongle (Broadcom - BCM20702A0); A list of supported BT dongles -> https://www.home-assistant.io/integrations/bluetooth#known-working-high-performance-adapters
Home Assitant (Supervisioned version) (I've being using currently Home Assistant 2023.6.3 -> Supervisor 2023.06.4 -> Operating System 10.3)
any bluetooth spearker without auto-inactivity auto-shutdown funciton. I've used Xiaomi Mi Compact Bluetooth Speaker 2 (XMYX02YM)

Identify your BT speaker's BT MAC Address & BT Name
Make sure that Proxmox - HA VM as Audio device added (for example: device=intel-hda, driver=none)
Install SSH addon into the HA and configure it
Switch off yout BT speaker
Loging into the HA using termina: login@IP_Adress
Type: bluetoothctl
Type: scan on
Switch on your BT speaker & enter it into paring mode
Check on the console if your BT speaker was detected (by name of MAC adress)
Type: pair MAC_ADRESS (for example: pair 00:11:22:33:44:55)
Type: trust MAC_ADRESS (for example: trust 00:11:22:33:44:55)
Type: connect MAC_ADRESS (for example: connect 00:11:22:33:44:55)
(in the case of any problems type help for more info)
Check the connected devices using command: pactl list pactl and look for something simiar to Name: bluez_sink.4C_72_74_XX_XX_XX.a2dp_sink
Make the new BT device as the default sound output by using follwing command: pactl set-default-sink NAME_OF_YOUR_BT_SPEAKER_FIND_IN_THE_PREV_STEP
Check of the output is not muted, nor volume set to zero, by Mute: (should be no) and Volume:, should be front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB by using following commend: pactl list sinks | grep "Mute:" and pactl list sinks | grep "Volume:"
Type ha audio reload and wait for Command completed successfully message
At this point your BT should be connected to your HA
Type: exit

Goto HA and install Settings -> Add-in VLC Local
Goto VLC Local -> Configuration
Set the Telnet Password and Http Password (you can use the default mypasswrd as well)
change the Audio-Output to the correspinding BT Name (it's the same obtainied at I.1 point)
Go back to VLC-Local Info tab and enable Auto-Start option
Get back to Info tab hit Start
Go to HA Settings -> Devices & Services (Integrations) and Add New Integration
Search for VLC LAN select it and pick-up Local VLC Media player via Telnet
Enter the password Telnet Password and click Submit
NOTE: in case when VM with HA restarts & or BT device shutdowns power on the dev (XMYX02YM should say "Connected" after a few seconds) and go to section I.12 and II.4 points, and start VLC Local back again

Go to Developers Tools and Services and enter followings :
Service: Media player: Play media
Target: Search for VLC and select your one
Content type: music
Content ID: /local/your.mp3 (files your.mp3 should be located at the /local/www/ folder of your HA installation)
Press Call-Service