Relax Aqara — Aqara W100 for Homey
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Easy guide: using thermostat mode on the W100
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1. Add the W100 to Homey Zigbee and open the device in the Homey app.
2. Turn thermostat mode ON with a Flow:
When … (whatever you like)
Then … Aqara W100 → "Set thermostat mode" → On (thermostat display & control).
3. After that, use the W100 screen and keys as a normal thermostat (mode, fan, target temp).
4. Optional Flows to push targets from Homey:
• "Set PMTSD heating target (°C)"
• "Set PMTSD cooling target (°C)"
5. Turn thermostat mode OFF with the same card set to Off when you want the unit to behave
like a simple sensor + three buttons again (see next section).
Physical buttons vs Homey Flows (read this)
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When THERMOSTAT MODE IS ON:
The W100 uses its keys for the on-device thermostat UI. Homey does NOT receive the
same multistate events as when thermostat mode is off, so Flow triggers such as
"Up button single pressed", "Middle button held", etc. DO NOT WORK.
Use these instead while thermostat mode is on:
• "Heating target changed on panel" (tag: degrees)
• "Cooling target changed on panel" (tag: degrees)
• "Thermostat mode changed on panel" (tag: mode: off / cool / heat / auto)
When THERMOSTAT MODE IS OFF:
The three physical buttons can trigger your classic Flows (up / middle / down × single,
double, hold, release).
Flow cards quick reference
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Actions (Then):
• Set thermostat mode — On = thermostat UI; Off = button Flows.
• Set PMTSD heating target (°C)
• Set PMTSD cooling target (°C)
Triggers (When) — device: Aqara W100:
Thermostat mode ON (panel): heating/cooling target changed, thermostat mode changed (see above).
Thermostat mode OFF: up / middle / down button triggers.
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