Nabu Casa Launches Home Assistant Connect Aux-2

Nabu Casa launches Home Assistant Connect AUX-2, a multifunctional device that connects traditional household equipment with smart home systems through audio streaming, Bluetooth, serial control, and Power over Ethernet.

Nabu Casa, the company behind official Home Assistant hardware, launches Home Assistant Connect AUX-2, a multifunctional connectivity device designed to integrate conventional household equipment into smart home ecosystems. The new device aims to extend the functionality of existing appliances and electronic equipment without requiring homeowners to replace them with connected alternatives. Priced at $69 in the United States and €59 in Europe, the product is available worldwide.

Connect AUX-2 combines audio streaming, serial device control, Bluetooth connectivity, and Power over Ethernet (PoE) support in a compact unit. It enables users to connect traditional audio equipment, televisions, climate control systems, solar inverters, and other compatible devices to Home Assistant. The system also supports USB connectivity and Wi-Fi, offering flexibility in installation and network configuration.

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One of its key features is audio streaming, which allows users to connect older amplifiers and hi-fi systems with modern smart speakers. Through Music Assistant and the Sendspin protocol, AUX-2 supports synchronized audio playback across compatible speaker systems, including devices from different manufacturers. Its combined optical digital and analog audio output supports high-quality music playback, including locally stored FLAC files and supported streaming services.

The device also incorporates two RS-232 serial ports, enabling users to control compatible televisions, AV receivers, and other equipment through Home Assistant. It additionally supports RS-485 connectivity through an external USB adapter, extending integration to compatible industrial and household systems, including solar inverters and heating equipment. This functionality allows users to manage certain device operations while reducing dependence on proprietary cloud services.

For wireless connectivity, AUX-2 functions as a dedicated Bluetooth proxy, enabling Home Assistant to discover and communicate with compatible Bluetooth devices. Its USB port also supports compatible Z-Wave adapters, allowing users to position their wireless network equipment in locations with better signal coverage. The company indicates that Zigbee connectivity is still undergoing testing and is not yet promoted as a fully supported everyday feature. Thread connectivity is not supported.

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Another feature is its Grove connector, which enables users to attach external sensors for monitoring temperature, humidity, and lighting conditions. Built on ESPHome, the device supports firmware customisation and hardware modifications, providing flexibility for developers and smart home enthusiasts. PoE and USB-C power options further simplify installation.

Through Connect AUX-2, Nabu Casa strengthens the Home Assistant ecosystem by promoting device compatibility, local control, and hardware sustainability. The launch reflects the growing demand for flexible smart home solutions that extend the usefulness of existing appliances while reducing electronic waste.