Aqara W100

The Aqara W100 (Zigbee TH-S04D) is a temperature and humidity sensor with a display and buttons. It works as the room temperature sensor of a VTherm (see base attributes) and can also act as a wall-mounted remote to change the VTherm mode and setpoint.

Use as a remote for VTherm

Since Zigbee2MQTT 2.7.0, the W100 exposes a virtual climate entity. The Aqara W100 Thermostat Synchronization blueprint keeps it in sync with the VTherm in both directions:

1. Update Zigbee2MQTT to 2.7.0 or later and pair the W100.
2. Turn on the W100 Thermostat mode switch.
3. Import the blueprint and create an automation with:
   • Main Thermostat: the VTherm climate entity,
   • Aqara W100 Climate Controller: the W100 climate entity.

Mode, setpoint and fan mode changes made on the W100 are applied to the VTherm, and changes made on the VTherm are shown on the W100. The blueprint can also show an external temperature and humidity on the W100 display.

Reporting interval

Like other Aqara sensors, the W100 only reports the temperature when it changes. In a stable room, check that the delay between two updates stays below the VTherm safety delay (see Recommended thermometers).