Aqara Smart Radiator Thermostat E1 (SRTS-A01)

Quick verdict

A polished radiator valve with a colour display that, on Zigbee2MQTT, gives you the whole feature set locally - modes, presets, child lock, window detection, frost protection and an external-temperature input. ZHA support is thinner than Z2M, so Zigbee2MQTT is the recommended path. Note that Matter and HomeKit are only available by bridging through an Aqara hub; the bare valve is Zigbee-only.

Standout: A Zigbee radiator valve exposing a full climate set on Zigbee2MQTT - schedules, window detection, frost protection, external temperature - with no Aqara hub.

Notes last checked Jun 7, 2026.

Compatibility snapshot

Why it stands out

• Pairs directly to a generic Zigbee coordinator on ZHA or Zigbee2MQTT - no Aqara hub for core heating control
• Zigbee2MQTT exposes the full feature set: setpoint 5-30C, presets, child lock, window detection, frost protection, external temperature
• Roughly one-year battery life; ships with RA/RAV/RAVL adapters for broad radiator fit

Reasons to hesitate

• ZHA support is more limited than Zigbee2MQTT (some modes/battery may not surface)
• HomeKit, Matter bridging and Aqara-app features require an Aqara hub + cloud
• No native Matter or Thread on the valve itself

Best for

• Zigbee2MQTT users wanting a full-featured local radiator valve
• Hydronic-radiator homes already running a Zigbee coordinator

Avoid if

• You only run ZHA and want every feature exposed (Z2M is better here)
• You have electric baseboard or forced-air heat rather than hydronic radiators

Privacy and local-control notes

On Zigbee2MQTT or ZHA it pairs straight to your own coordinator with no Aqara hub or cloud. An Aqara hub is only needed for the Aqara app, HomeKit or Matter bridging.

Home Assistant support: supported · integration path: Zigbee2MQTT (full features) or ZHA (more limited), local.

Buying reality check

Price notes: Around $55-$70. Runs about a year on 2x AA.

Compare side by side: see thermostat comparisons →