Test Stand

Reference deployment used for current validation of Sendspin BT Bridge stable v2.40.5.

The matrix below reflects the March 18 validation cycle: the stable HA add-on track on HAOS, plus standalone Proxmox and Turris LXC installs. RC/Beta add-on variants now use separate default ingress/player port ranges (8081 / 9028, 8082 / 9128) for side-by-side HAOS testing, but the HAOS node documented here remains the stable track unless noted otherwise.

Physical topology

graph TB
    subgraph net["LAN 192.168.10.0/24"]
        direction TB

        subgraph turris["Turris Omnia — Marvell Armada 385 ARMv7 / 2 GB RAM"]
            direction TB
            T_HOST["TurrisOS 9.0.4 / OpenWrt<br/>turris.my.lan<br/>router + DHCP + DNS"]
            T_USB["USB: CSR8510 A10<br/>0a12:0001"]
            subgraph T_LXC["LXC sendspin — Ubuntu 24.04 armv7l — turris-lxc.my.lan"]
                T_DBUS["D-Bus system bus<br/>bind-mount from host"]
                T_PA["PulseAudio 16.1 --system<br/>user pulse uid=109"]
                T_BLUEZ["BlueZ 5.72<br/>bluetoothctl"]
                T_SBB["SBB v2.40.5<br/>Python 3.12.3<br/>aiosendspin 4.3.2"]
                T_WEB["Flask 3.1.3 + Waitress 3.0.2<br/>:8080"]
                T_DBUS --> T_BLUEZ
                T_DBUS --> T_PA
                T_PA --> T_SBB
                T_BLUEZ --> T_SBB
                T_SBB --> T_WEB
            end
            T_HOST --> T_USB
            T_USB -.->|D-Bus passthrough| T_DBUS
        end

        subgraph proxmox["HP ProLiant MicroServer Gen8 — Celeron G1610T 2.3 GHz / 16 GB RAM"]
            direction TB
            P_HOST["Proxmox VE 8.4.16<br/>Debian 12 Bookworm<br/>Kernel 6.8.12-18-pve<br/>proxmox.my.lan"]
            P_USB1["USB Bus 4: CSR8510 A10<br/>PVE mapping: Audio"]
            P_USB2["USB Bus 2: CSR8510 A10<br/>PVE mapping: BLE"]
            P_ZIG["USB: SONOFF Zigbee 3.0<br/>1a86:55d4"]

            subgraph P_VM["VM 104 haos — QEMU/KVM — 2 vCPU / 6 GB RAM / 64 GB disk"]
                P_HAOS["Home Assistant OS<br/>haos.my.lan"]
                P_ADDON["SBB v2.40.5 addon<br/>85b1ecde-sendspin-bt-bridge<br/>3 devices / sync group"]
                P_HAOS --> P_ADDON
            end

            subgraph P_CT["CT 101 sendspin — LXC — 2 vCPU / 1 GB RAM / 4 GB disk"]
                P_DBUS["D-Bus system bus"]
                P_PA["PulseAudio 16.1"]
                P_BLUEZ2["BlueZ 5.72"]
                P_SBB["SBB v2.40.5<br/>Ubuntu 24.04 x86_64<br/>Python 3.12.3"]
                P_WEB2["Flask 3.1.3 + Waitress 3.0.2<br/>:8080"]
                P_DBUS --> P_BLUEZ2
                P_DBUS --> P_PA
                P_PA --> P_SBB
                P_BLUEZ2 --> P_SBB
                P_SBB --> P_WEB2
            end

            P_HOST --> P_USB1
            P_HOST --> P_USB2
            P_HOST --> P_ZIG
            P_USB1 -->|USB passthrough| P_VM
            P_USB2 -.->|D-Bus passthrough| P_DBUS
            P_ZIG -->|USB passthrough| P_VM
        end

        subgraph ma_box["Music Assistant Server"]
            MA["MA haos.my.lan:8095<br/>Sendspin protocol :9000<br/>mDNS auto-discovery"]
        end
    end

    P_ADDON -->|"WS :8928 :8929 :8932"| MA
    P_SBB -->|"WS :8928"| MA
    T_SBB -->|"WS :8928"| MA

    style net fill:none,stroke:#666
    style turris fill:#1a3a1a,stroke:#4a4
    style proxmox fill:#1a1a3a,stroke:#44a
    style ma_box fill:#3a1a1a,stroke:#a44
    style P_VM fill:#2a2a1a,stroke:#aa4
    style P_CT fill:#1a2a2a,stroke:#4aa
    style T_LXC fill:#1a2a2a,stroke:#4aa

Audio routing

graph LR
    subgraph haos_bridge["HAOS Addon (stable track) — hci0 + hci1"]
        direction TB
        H_MA["MA :9000"] -->|FLAC 44100/16/2| H_D1["daemon :8928<br/>PULSE_SINK=bluez_sink<br/>.FC_58_FA_EB_08_6C<br/>.a2dp_sink"]
        H_MA -->|FLAC 44100/16/2| H_D2["daemon :8929<br/>PULSE_SINK=bluez_sink<br/>.2C_D2_6B_B8_EC_5B<br/>.a2dp_sink"]
        H_MA -->|FLAC 44100/16/2| H_D3["daemon :8932<br/>PULSE_SINK=bluez_sink<br/>.30_21_0E_0A_AE_5A<br/>.a2dp_sink"]
    end

    subgraph proxmox_bridge["Proxmox LXC — hci0 00:15:83:FF:8F:2B"]
        P_MA["MA :9000"] -->|FLAC 44100/16/2| P_D1["daemon :8928<br/>PULSE_SINK=bluez_sink<br/>.6C_5C_3D_35_17_99<br/>.a2dp_sink"]
    end

    subgraph turris_bridge["Turris LXC — hci0 C0:FB:F9:62:D7:D6"]
        T_MA["MA :9000"] -->|FLAC 44100/16/2| T_D1["daemon :8928<br/>PULSE_SINK=bluez_sink<br/>.20_74_CF_61_FB_D8<br/>.a2dp_sink"]
    end

    H_D1 -->|"A2DP / -600ms"| S1["ENEBY20<br/>58%"]
    H_D2 -->|"A2DP / -400ms"| S2["Yandex mini<br/>52%"]
    H_D3 -->|"A2DP / -600ms"| S3["Lenco LS-500<br/>52%"]
    P_D1 -->|"A2DP / -900ms"| S4["ENEBY Portable<br/>59%"]
    T_D1 -->|"A2DP / -500ms"| S5["AfterShokz<br/>67%"]

    style haos_bridge fill:#2a2a1a,stroke:#aa4
    style proxmox_bridge fill:#1a2a2a,stroke:#4aa
    style turris_bridge fill:#1a3a1a,stroke:#4a4

MA player registry

graph TB
    subgraph ma_players["Music Assistant — 9 registered players"]
        direction TB

        subgraph sync_group["Sync Group: Sendspin BT"]
            SG["whole-home multiroom"]
        end

        subgraph bt_players["Sendspin BT Bridge players"]
            direction LR
            P1["ENEBY20 @ HAOS<br/>host: 85b1ecde"]
            P2["Yandex mini @ HAOS<br/>host: 85b1ecde"]
            P3["Lenco LS-500 @ HAOS<br/>host: 85b1ecde"]
            P4["ENEBY Portable @ LXC<br/>host: sendspin"]
            P5["AfterShokz @ OpenWRT<br/>host: ubuntu"]
        end

        subgraph other_players["Other players"]
            direction LR
            P6["MacBook Pro<br/>Sendspin desktop"]
            P7["Web Chrome x2<br/>browser players"]
        end

        SG ---|member| P1
        SG ---|member| P2
        SG ---|member| P3
        SG ---|member| P4
        SG ---|member| P5
    end

    style ma_players fill:none,stroke:#666
    style sync_group fill:#3a1a1a,stroke:#a44
    style bt_players fill:#1a1a3a,stroke:#44a
    style other_players fill:#1a1a1a,stroke:#666

Port strategy snapshot

The current deployment matrix reflects the post-2.40.5 port model:

• stable HA addon keeps the standard HA ingress listener on 8080 and defaults device listeners from 8928 upward
• prerelease HA addon variants, when installed, use their own channel defaults (8081 / 9028 for RC, 8082 / 9128 for beta)
• standalone Docker/LXC deployments can override WEB_PORT, BASE_LISTEN_PORT, or per-device listen_port explicitly

Bridge instances

1. HAOS Addon — haos.my.lan:8080 (stable track)

Runs as the stable Home Assistant add-on track inside the HAOS VM on Proxmox.

Parameter	Value
Host	Proxmox VE 8.4.16, VM 104 (HAOS), 2 cores, 6 GB RAM
Platform	Home Assistant OS
Delivery track	stable (85b1ecde_sendspin_bt_bridge)
Hostname	85b1ecde-sendspin-bt-bridge
Bridge version	2.40.5 (build 2026-03-18)
BT adapters	Dual CSR8510 A10 passthrough (Audio + BLE mappings exposed to the addon runtime)
Audio	PulseAudio 17.0, A2DP sinks
Ports	Ingress 8080, player base 8928
MA server	auto:9000 (mDNS)

Devices (3):

Player	BT MAC	Sendspin port	PA sink	Volume	Delay
ENEBY20 @ HAOS	FC:58:FA:EB:08:6C	8928	bluez_sink.FC_58_FA_EB_08_6C.a2dp_sink	58%	−600 ms
Yandex mini @ HAOS	2C:D2:6B:B8:EC:5B	8929	bluez_sink.2C_D2_6B_B8_EC_5B.a2dp_sink	52%	−400 ms
Lenco LS-500 @ HAOS	30:21:0E:0A:AE:5A	8932	bluez_sink.30_21_0E_0A_AE_5A.a2dp_sink	52%	−600 ms

All 3 devices share MA sync group b55d7f67-acc2-4cba-b37e-9fbd3eb3b410 for multiroom playback. MA API integration is active (bi-directional volume/transport sync).

HA add-on track semantics

This stand validates the stable HA add-on track. RC and Beta variants can be installed side by side with defaults 8081 / 9028 and 8082 / 9128, but they must not manage the same Bluetooth speakers, adapters, or conflicting manual port overrides at the same time.

2. Proxmox LXC — proxmox-lxc.my.lan:8080

Runs as a systemd service inside an unprivileged LXC container on Proxmox.

Parameter	Value
Host	Proxmox VE 8.4.16, CT 101, 2 cores, 1 GB RAM, 4 GB disk
OS	Ubuntu 24.04 LTS (Noble Numbat), x86_64
Hostname	sendspin
Bridge version	2.40.5 (build 2026-03-18)
Python	3.12.3
BlueZ	5.72
PulseAudio	16.1
aiosendspin	4.3.2
Flask	3.1.3, Waitress 3.0.2
BT adapter	CSR8510 A10 (00:15:83:FF:8F:2B, hci0)
MA server	auto:9000 (mDNS)

Devices (1):

Player	BT MAC	Sendspin port	PA sink	Volume	Delay
ENEBY Portable @ LXC	6C:5C:3D:35:17:99	8928	bluez_sink.6C_5C_3D_35_17_99.a2dp_sink	59%	−900 ms

MA API integration active.

3. Turris LXC — turris-lxc.my.lan:8080

Runs as a systemd service inside an LXC container on Turris Omnia router (OpenWrt).

Parameter	Value
Host	Turris Omnia, TurrisOS 9.0.4 (OpenWrt), Marvell Armada 385 ARMv7, 2 GB RAM, 8 GB eMMC
OS	Ubuntu 24.04.4 LTS (Noble Numbat), armv7l
Hostname	ubuntu
Bridge version	2.40.5 (build 2026-03-18)
Python	3.12.3
BlueZ	5.72
PulseAudio	16.1
aiosendspin	4.3.2
Flask	3.1.3, Waitress 3.0.2
BT adapter	CSR8510 A10 USB (C0:FB:F9:62:D7:D6, hci0)
MA server	auto:9000 (mDNS)

Devices (1):

Player	BT MAC	Sendspin port	PA sink	Volume	Delay
AfterShokz @ OpenWRT	20:74:CF:61:FB:D8	8928	bluez_sink.20_74_CF_61_FB_D8.a2dp_sink	67%	−500 ms

OpenWrt specifics

The host requires a pulse user (uid 109) in /etc/passwd for D-Bus EXTERNAL authentication. Without it, PulseAudio inside the container cannot load module-bluez5-discover and BT audio profiles fail with br-connection-profile-unavailable. See OpenWrt LXC README for details.

Hardware summary

Hosts

Host	Hardware	CPU	RAM	Role
Proxmox	HP ProLiant MicroServer Gen8	Intel Celeron G1610T 2.3 GHz, 2 cores	16 GB	VM/CT hypervisor
Turris Omnia	CZ.NIC Turris Omnia	Marvell Armada 385 ARMv7 1.6 GHz, 2 cores	2 GB	Router + LXC host

Bluetooth adapters

All adapters are CSR8510 A10 (Cambridge Silicon Radio) USB dongles, USB ID 0a12:0001.

Adapter MAC	Location	Speakers
C0:FB:F9:62:D6:9D	Proxmox → HAOS VM 104 (USB passthrough)	ENEBY20, Yandex mini, Lenco LS-500
00:15:83:FF:8F:2B	Proxmox → CT 101	ENEBY Portable
C0:FB:F9:62:D7:D6	Turris Omnia USB	AfterShokz

Bluetooth speakers

Speaker	Type	BT MAC	Bridge	Notes
IKEA ENEBY20	Shelf speaker	FC:58:FA:EB:08:6C	HAOS	Multiroom group member
Yandex Station mini	Smart speaker	2C:D2:6B:B8:EC:5B	HAOS	Multiroom group member
Lenco LS-500	Turntable with BT	30:21:0E:0A:AE:5A	HAOS	Multiroom group member
IKEA ENEBY Portable	Portable speaker	6C:5C:3D:35:17:99	Proxmox LXC	Standalone
AfterShokz	Bone conduction headset	20:74:CF:61:FB:D8	Turris LXC	Standalone

Music Assistant

Parameter	Value
URL	http://haos.my.lan:8095
Host	HAOS VM 104 on Proxmox
Total players	9 (5 BT bridges + 1 sync group + 2 web + 1 desktop)
Sync group	”Sendspin BT” — groups all speakers for whole-home audio

Network

All devices on a flat 192.168.10.0/24 LAN. Turris Omnia is the router/gateway at turris.my.lan.

IP	Host	Service
turris.my.lan	Turris Omnia	Router, LXC host
haos.my.lan	HAOS VM	Music Assistant (:8095), Bridge addon (:8080)
proxmox.my.lan	Proxmox VE	Hypervisor web UI (:8006)
turris-lxc.my.lan	Turris LXC	Bridge (:8080)
proxmox-lxc.my.lan	Proxmox CT 101	Bridge (:8080)

Software stack (common)

All LXC bridge instances share the same software stack:

Component	Version
Sendspin BT Bridge	2.40.5
Ubuntu	24.04 LTS
Python	3.12.3
BlueZ	5.72
PulseAudio	16.1
aiosendspin	4.3.2
Flask	3.1.3
Waitress	3.0.2