Priced at 59 euros, Nabu Casa introduced the Connect AUX-2 to connect older audio gear to local smart home systems.
The small hardware box functions as an open and local alternative to Google’s discontinued Chromecast Audio while offering broader integration capabilities, Živě.cz reported.
Running on an ESP32-S3 chip with ESPHome firmware, the device integrates directly into the Home Assistant platform. Audio transmission relies on a single 3.5mm connector supporting both analog and optical digital output.
Sync audio across multiple players using Sendspin
Playback is handled by the Music Assistant server alongside the Sendspin protocol for multiroom audio synchronization. Users can group multiple AUX-2 units together and combine them with Sonos, Apple HomePod, and other compatible players.
The unit features two RS-232 serial ports for local communication with supported televisions and AV receivers. These ports enable local automation tasks like powering devices on, adjusting volume, and switching inputs without relying on manufacturer cloud servers.
An integrated USB-A port supports the Connect ZWA-2 adapter for Z-Wave wireless technology or a Modbus adapter to link solar stringers and backup power supplies. The device also functions as a Bluetooth proxy to connect nearby Bluetooth accessories directly to Home Assistant.
Flash alternative firmware via an unlocked bootloader
An unlocked bootloader allows users to flash alternative firmware options such as Squeezelite or Snapcast onto the hardware. Power and network connectivity can be supplied via Power over Ethernet, or users can rely on a standard USB-C connection paired with 2.4 GHz Wi-Fi 4.
Power consumption ranges between 1 and 2 watts during operation. Standard operation requires Home Assistant 2026.9 or newer.
The recommended retail price is 59 euros including tax, while Czech retailers Alza and SmarterHome list the hardware at 1,649 CZK. Connection cables are not included in the retail packaging and must be purchased separately.
What powers and runs the Connect AUX-2?
What firmware powers the Connect AUX-2 out of the box?
The device runs on ESPHome firmware using an ESP32-S3 chip to integrate directly with Home Assistant.
How much power does the device consume during standard operation?
Power consumption ranges between 1 and 2 watts, with connectivity options including PoE, USB-C, and Wi-Fi 4.
What software version is required to run the device?
Standard operation requires Home Assistant 2026.9.
Home Assistant and Nabu Casa provided the product details and pricing specifications.