Milesight LoRaWAN smart thermostats provide wireless, battery-friendly climate control for buildings — covering individual radiators, central HVAC systems, and fan coil units. All communicate via LoRaWAN Class C for near-real-time control and integrate with BMS systems via MQTT, HTTP, or BACnet.
Thermostat model selector
WT101 / WT102 | Smart radiator thermostat — for individual radiators with thermostatic valves (TRVs). Best for hotels, residential, offices with radiator heating. |
WT201 / WT211 | Smart thermostat for 24VAC HVAC — heat pumps, furnaces, boilers, AHU, PTAC. For buildings with central HVAC systems. |
WT301 / WT303 / WT304 | Smart fan coil thermostat — for FCUs (fan coil units), 2-pipe or 4-pipe, on/off or 0–10V proportional valve, 3-speed or EC fan. |
WT401 | Wireless split-unit thermostat — unmatched installation flexibility, works without fixed wiring to the HVAC unit. |
WT101 / WT102 — Smart Radiator Thermostat
Fits standard thermostatic radiator valves (TRVs). Controls per-radiator temperature, enabling room-by-room heating management without central infrastructure changes.
Control | Per-radiator temperature setpoint, scheduling (up to 16 heating plans) |
EPBD compliance | Designed to help meet EU Energy Performance of Buildings Directive (EPBD) requirements for individual room temperature control |
Energy harvesting | Some models include energy harvesting capability |
Integration | Links with EM300-TH zone sensors for accurate room temperature input, and with WS301 window/door contacts to stop heating when windows open |
Use cases | Hotels (pre-heating before check-in, setback when vacant), offices, residential buildings with radiator heating |
WT201 / WT211 — Smart HVAC Thermostat (24VAC)
Controls central heating and cooling systems. Supports up to 4 stages of heating, 2 stages of cooling, and emergency heat mode for heat pumps.
Compatible systems | Heat pumps, furnaces, boilers, AHU, PTAC, air conditioning (24VAC systems) |
Modes | Heat, Cool, Auto, Emergency Heat, Fan (Auto/On) |
Heating stages | Up to 4 stages heating, 2 stages cooling + emergency heat |
Temperature input | Supports up to 5 EM300-TH zone sensors via D2D for accurate room-level control |
Data storage | Up to 1000 records — retransmits on reconnect |
BMS protocols | MQTT(S), HTTP, BACnet via Milesight IoT Cloud or gateway |
Use cases | Commercial office buildings, hotels with central HVAC, mixed heating/cooling systems |
WT301 / WT303 / WT304 — Smart Fan Coil Thermostat
Manages fan coil units (FCUs) — the most common HVAC terminal unit in hotels, offices, and commercial buildings worldwide.
Compatible FCU types | 2-pipe or 4-pipe, on/off valve or 0–10V proportional valve, 3-speed fan or EC fan |
WT303/WT304 | Next generation of WT301/WT302 — extends to 4-pipe FCUs, EC fans, more complex scheduling (8 plans × 16 time slots) |
Key card integration | Key card input — room switches to Comfort mode when card inserted, ECO mode when removed (hotel energy saving) |
Temperature modes | 3 control modes, 4 fan speed modes |
Local control | LCD screen and touch buttons for in-room control |
Use cases | Hotels (energy saving via key card), commercial offices, serviced apartments, any building with FCU climate control |
WT401 — Wireless Smart Thermostat
Split-unit design with maximum installation flexibility — no fixed wiring to the HVAC unit required. The temperature control display and the HVAC interface can be installed in separate locations.
Power | Multiple power supply options (mains or battery) |
Use cases | Situations where wiring to the HVAC unit is impractical, retrofit installations, accessible areas requiring separate thermostat placement |
Setup in Vemcount
Milesight thermostats connect via LoRaWAN gateway (UG65/UG67/SG50) pushing to Vemcount at ttn.vemcount.app UDP 1700. In Vemcount, thermostat setpoints, current temperature readings, and HVAC mode data appear on the IoT dashboard. Threshold alerts (e.g. temperature exceeds set point by X°C) can be configured for automated notifications to facility management teams.