Bluetooth Proxy: Allow per-proxy blacklist of BLE device addresses to suppress forwarded advertisements

[bdngywjxkt-prog]

Component name

bluetooth_proxy

Link to component documentation on our website

https://esphome.io/components/bluetooth_proxy/

Describe the enhancement

Today, ESPHome Bluetooth Proxies forward all received BLE advertisements to Home Assistant,
which then decides which proxy to use based on RSSI and other heuristics.

In setups with multiple Bluetooth proxies and overlapping coverage, this can lead to
unreliable behavior: a BLE device may associate with a distant proxy instead of a nearby one,
causing unstable presence detection or delayed updates.

Proposed enhancement

Add an optional per-proxy blacklist of BLE device addresses.
If a device is listed in the blacklist of a given proxy, that proxy simply does not forward
advertisements from that device.

This keeps the system simple and deterministic:

• No RSSI thresholds
• No dynamic proxy selection logic
• No changes to Home Assistant’s Bluetooth stack

Example YAML configuration

bluetooth_proxy:
  blacklist:
    - "AA:BB:CC:DD:EE:FF"
    - "11:22:33:44:55:66"

Use cases

• Multi-room presence detection
  In homes with several Bluetooth proxies, presence sensors (e.g. SwitchBot devices or BLE beacons)
  may randomly associate with a farther proxy. Blacklisting allows excluding those devices on distant
  proxies while keeping redundancy on nearby ones.

• Large installations with many proxies
  In environments with 4–10 Bluetooth proxies, deterministic routing of BLE advertisements improves
  reliability and predictability.

• Improved performance and efficiency
  Suppressing unwanted advertisements at the proxy level reduces Bluetooth traffic forwarded over Wi-Fi
  and processed by Home Assistant.

• Explicit configuration instead of heuristics
  Users who know their physical layout can define clear rules instead of relying on fluctuating RSSI-based
  heuristics.

Anything else?

I have a working prototype and can provide a PR if desired.

[github-actions[bot]]

🏷️ I've automatically added the component: bluetooth_proxy label to help categorize this feature request.