Assist_microphone ConnectionResetError loop - OpenWakeWord not receiving audio - Pi 4 fresh install

Configuration Voice Assistant
1

Hello everyone,

I’m having issues getting the wake word detection working on a fresh Home Assistant OS installation on a Raspberry Pi 4 (4GB).

Important: I do not want to use Nabu Casa / Home Assistant Cloud. I want a fully local setup.

Setup:

  • :desktop_computer: Hardware: Raspberry Pi 4 4GB
  • :studio_microphone: Microphone: Razer Seiren V3 Mini (USB) — correctly detected in assist_microphone config
  • :loud_sound: Speaker: Built-in Audio Stereo
  • :package: Add-ons: assist_microphone, OpenWakeWord, Whisper (faster-whisper), Piper
  • :gear: Pipeline: Nestor — STT: faster-whisper (fr), TTS: piper/gilles, Wake word: OpenWakeWord + Okay Nabu

Problem: assist_microphone connects to the server, sends run-pipeline, then gets a ConnectionResetError: [Errno 104] Connection reset by peer repeatedly. The add-on restarts every ~8-16 minutes (signal 15, clean exit). OpenWakeWord loads okay_nabumodel correctly but stops receiving audio after a while.

assist_microphone log pattern:

INFO:root:Connected to server
INFO:root:Streaming audio
DEBUG:root:Event(type='run-pipeline', data={'start_stage': 'wake', ...})
DEBUG:root:Ping enabled
WARNING:root:Did not receive ping response within timeout
DEBUG:root:Server disconnected
ConnectionResetError: [Errno 104] Connection reset by peer

OpenWakeWord log pattern:

Client connected: XXXX
Loaded models: ['okay_nabu']
Receiving audio from client: XXXX
[... then after a few minutes ...]
Client disconnected: XXXX
[no new audio client connects]

What works:

  • :white_check_mark: Whisper starts correctly
  • :white_check_mark: Piper TTS works
  • :white_check_mark: Pipeline works via Assist web interface (text mode)
  • :white_check_mark: assist_satellite.announce action plays audio correctly
  • :white_check_mark: CPU usage ~23%, no resource issues

What doesn’t work:

  • :x: Wake word “Okay Nabu” never detected
  • :x: OpenWakeWord stops receiving audio after reconnection cycles
  • :x: Did not receive ping response within timeout appears regularly

Has anyone experienced this on a recent HAOS version? Any fix or workaround appreciated :pray: