Eve Thermo 5th Gen Review: Matter and Thread, No Cloud Needed

The box contains two AA batteries, a mounting screw with nut, and adapters for Danfoss RA, RAV and RAVL. The standard connection is M30 × 1.5 mm. Installation on a bathroom towel radiator was straightforward.

Setup and scheduling

The thermostat was first added to Home Assistant through an own OpenThread Border Router, with Home Assistant acting as Matter controller. It was then shared by Matter code with Apple Home and the Eve app (multi-admin). Setting up with the Eve app requires a Bluetooth connection to an iPhone.

An Android Eve app exists, but it only supports devices connected through Google Home with a Thread border router. Without one of those, Android users lose the central comfort feature: schedules. Schedules created in the Eve app are stored on the thermostat itself and keep running even if Home Assistant, the phone or the cloud is unavailable. Schedules built with Home Assistant tools such as the Scheduler Card only work while the server is running.

In Home Assistant the device exposes many entities, including a climate entity with off and heat modes and several presets, a valve position sensor showing opening from 0 to 100 percent, a temperature offset for calibration, child lock, Thread diagnostics, battery data and error indicators.

Thermo Control as external sensor

Because the thermostat sits directly on the valve, its internal sensor tends to read too high because of radiated heat. Eve's answer is the Thermo Control, sold separately for about 76 euros. The sensor has an E-Ink display, measures temperature and humidity, and links to the thermostat through a direct Matter binding. Pairing it with the thermostat also works without the Eve app, via Home Assistant. Alternatively, the internal sensor can be calibrated with the offset.