Home Assistant Connect ZWA-2, Z-Wave adapter and antenna

The Home Assistant Connect ZWA‑2 is one of the most advanced Z‑Wave adapters, specifically developed for use with the Home Assistant ecosystem. It's the perfect choice for reliably connecting Z‑Wave devices across long distances, especially thanks to its Z‑Wave Long Range support.

The antenna and adapter base are precisely tuned to the Z‑Wave frequency to optimize range and connection stability—even through thick walls or when communicating with remote devices. Z‑Wave Long Range technology not only enhances reliability but also improves battery life for Z‑Wave devices powered by batteries.

The product was developed by the Home Assistant and Z‑Wave JS teams. Installation is virtually plug-and-play, with an easy migration process from previous adapters and one-click firmware updates.

About Nabu Casa

The Home Assistant Connect ZWA‑2 is developed by Nabu Casa, the official organization behind the Home Assistant project. Nabu Casa aims to make building and managing a smart home system easier for users, with a strong emphasis on data privacy and local control.

Its most well-known offerings include the Home Assistant Cloud service, and hardware products like Home Assistant Green and Yellow. Nabu Casa solutions are designed to natively support the Home Assistant platform and primarily serve users who value open-source, flexible, and privacy-respecting smart home environments.

Z-Wave® Protocol – Overview

The Z-Wave® protocol is an interoperable, wireless, radio-frequency based communication technology designed specifically for control, monitoring, and status reporting in residential and light commercial environments. As a proven and widely adopted solution, Z-Wave® is the global market leader in control systems, offering affordable, reliable, and easy-to-use "smart" products for every aspect of daily life.

Interoperability has always been a core element of the Z-Wave® protocol, with features like backward compatibility, security, and reliability. All Z-Wave® devices can work within any Z-Wave® network alongside other Z-Wave® certified devices, regardless of manufacturer or brand. In the network, any node that is mains-powered also acts as a repeater—regardless of vendor—further increasing the network’s reliability.

There are over 4,000 certified Z-Wave® products available, all backward and forward compatible within the Z-Wave® ecosystem, with over 100 million devices currently on the market. The technology boasts more than 20 years of market presence and offers robust security measures to make your home network smarter and safer.

Main Product Features

• Precision design – The antenna and base are tuned to perfectly match the ideal wavelength of Z‑Wave technology, ensuring maximum range and reliable connectivity.
• Latest Z‑Wave technology – Utilizes the latest Z‑Wave 800 series chip (Silicon Labs ZG23), offering full compatibility with all Z‑Wave devices, including Z‑Wave Plus and Plus V2 variants.
• Dedicated Z‑Wave frequency band – Operates on a separate frequency band from other wireless devices like Wi‑Fi or Bluetooth, offering stable connections even through thick walls.
• Z‑Wave Long Range standard – Enables faster and more reliable communication with distant devices and extends battery life of battery-powered Z‑Wave devices.
• Fully compatible with Home Assistant – Designed by the Home Assistant and Z‑Wave JS teams for seamless integration with the platform.
• Easy migration – Effortlessly switch from most existing Z‑Wave adapters without needing to reconfigure your setup.
• Second-generation platform – Based on the Home Assistant Connect second-gen architecture(Silicon Labs ZG23), delivering high performance and future integration readiness.
• Designed for home use – Stylish, candle-like design with semi-transparent polycarbonate housing and discreet lighting fits any interior.

Smart Home Protocols and Platform Compatibility

• Protocols – Z‑Wave and Z‑Wave Long Range
• Native compatibility – Fully supported in Home Assistant environments.
• Voice control – Not directly supported by Alexa or Google Assistant, but control is possible via Home Assistant integration.

Smart Features

• Remote status monitoring (ON/OFF status available on the Home Assistant interface)
• Remote ON/OFF control
• Create automations and scenes in Home Assistant (e.g. turn on lights when motion is detected)
• OTA firmware updates with one-step simplicity
• Quick migration from previous Z‑Wave adapter
• Plug-and-play installation with setup wizard
• Local operation – fully functional within Home Assistant, no cloud dependency
• Advanced features – second-generation platform allows excellent scalability and readiness for further Home Assistant integrations

Technical Specifications

• Power supply – USB‑C, 5 V DC, 1 A required
• Omnidirectional antenna – Uniform signal transmission in all directions
• Dimensions – 125 × 125 × 315 mm
• Material – Polycarbonate plastic, glossy white with semi-transparent top at the antenna
• Certifications – CE, FCC, RCM, FCC‑ID: 2A8ZE05
• Compatibility regions – All Z‑Wave regions (US, EU, AU); current Long Range support: US and EU
• Environmental conditions – Indoor use only, 0 °C to 65 °C, non-condensing environment, avoid excessive dust, direct sunlight, or heat sources