Nabu Casa
Home Assistant Voice Preview Edition
- Wi-Fi
- Bluetooth
Verified September 2026
This is Nabu Casa's own voice assistant hardware — and the 'Preview Edition' name is honest: expect occasional rough edges as wake-word accuracy and language support keep evolving. The pitch is real though. Unlike Alexa or Google Home, nothing is stored or profiled; voice runs fully local on capable Home Assistant hardware (Intel N100 or better) or via Home Assistant Cloud, which trades a touch of latency for far better accuracy on lower-powered setups. Best suited to households already committed to Home Assistant who want a genuinely private mic in the room — not a first assistant for casual smart-speaker buyers.
In Home Assistant
| Control | Type | What it does |
|---|---|---|
| Assist | Voice pipeline | Local (or cloud-assisted) voice commands |
| Mute | Switch | Physically cuts power to the microphones |
| Wake word | Selector | Choose the trigger phrase |
| Media player | Media player | Plays responses and announcements through the built-in speaker |
Voice pickup runs through a dedicated XMOS XU316 DSP doing echo cancellation and noise removal before audio ever reaches the ESP32-S3 — so if Assist mishears you, the audio front-end is the first thing to check, not the wake-word model. The hardware mute switch is a real HA entity (not just a firmware toggle), so you can build an automation that silences the device's own TTS announcements or site-wide notifications whenever someone physically mutes it.
Specs
- soc
- ESP32-S3 with 16MB flash, 8MB PSRAM
- audio
- Dual microphones with XMOS XU316 audio processing; internal speaker for voice feedback plus 3.5mm line out (TI DAC, 48kHz)
- power
- USB-C, 5V/2A minimum (5V/3A recommended); power supply not included
- firmware
- ESPHome, fully open source
- dimensions
- 84 x 84 x 21 mm, 96g
- connectivity
- 2.4 GHz Wi-Fi, Bluetooth 5.0