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Apollo Automation AIR-1

The Apollo Automation AIR-1 is a compact indoor air quality monitor built by a small US company specifically for the Home Assistant community. It ships running ESPHome, the open-source firmware platform, and measures the pollutants that actually matter indoors: particulate matter across several size bins, volatile organic compounds, temperature, and humidity from its core Sensirion sensor module, with optional add-ons including a dedicated CO2 sensor for configurations that include it. Plug it into USB-C power, add it to your Wi-Fi, and it appears in Home Assistant over the local ESPHome API with no app, no account, and no cloud anywhere in the loop.

Aqara Door and Window Sensor P2

The Aqara Door and Window Sensor P2 is a small Thread-based contact sensor that reports whether a door, window, drawer, or cabinet is open or closed. Unlike Aqara's older Zigbee sensors, the P2 speaks Matter over Thread natively, so it pairs directly with any Thread border router and Matter controller, an Apple TV 4K, HomePod, Home Assistant with a Thread radio, or a SmartThings hub, without ever touching an Aqara hub or the Aqara cloud. Pairing is a QR-code scan, and from that point everything runs on your local network.

SONOFF Zigbee 3.0 USB Dongle Plus

The SONOFF Zigbee 3.0 USB Dongle Plus, commonly known by its model name ZBDongle-P, is a USB Zigbee coordinator built around the Texas Instruments CC2652P radio chip with a +20 dBm power amplifier and an external SMA antenna. Plugged into a machine running Zigbee2MQTT or Home Assistant's ZHA integration, it becomes the brain of a fully local Zigbee network, pairing and controlling bulbs, sensors, switches, and plugs from hundreds of manufacturers without any proprietary hub, account, or cloud service involved.