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LoRaWAN Smart Thermostat – 24 VAC HVAC Control, 4.2-inch Display: WT201 | Milesight

Milesight WT201 LoRaWAN smart thermostat for 24 VAC HVAC systems. Features a 4.2-inch LCD, temperature and humidity sensors, programmable schedules and remote heating and cooling control.

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The Milesight WT201 is a LoRaWAN smart thermostat designed for temperature control and remote management of compatible 24 VAC HVAC systems. It supports heating and cooling equipment including furnaces, air conditioners, heat pumps, boilers and packaged terminal air conditioners (PTAC).

Equipped with a 4.2-inch LCD display, built-in temperature and humidity sensors, programmable operating schedules and LoRaWAN connectivity, the WT201 provides local and remote HVAC control for residential and commercial building applications.

The thermostat integrates with compatible LoRaWAN gateways and Milesight Development Platform, enabling centralized temperature management, remote configuration and interaction with other connected devices.

What is the WT201 used for?

The WT201 is designed to control indoor temperatures by managing the operation of compatible heating, cooling and ventilation equipment. It provides manual and scheduled temperature adjustment, monitors ambient temperature and humidity, and supports remote HVAC management through a connected LoRaWAN infrastructure.

The thermostat also supports a dry-contact digital input for integration with compatible physical switches, including hotel room keycard systems. This makes it suitable for installations requiring centralized temperature management and automated operating schedules.

Advantages

Broad HVAC compatibility: supports multiple 24 VAC heating and cooling systems, including furnaces, air conditioners, heat pumps, boilers and PTAC units.
Flexible temperature control: supports Heat, Emergency Heat, Cool and Auto operating modes.
Fan management: provides Auto, On and Circulate fan modes.
Programmable scheduling: supports seven working modes with up to 16 schedules per mode.
Integrated environmental sensors: continuously measures ambient temperature and relative humidity.
Clear local interface: 4.2-inch LCD display with white backlight for temperature, humidity and room status information.
LoRaWAN connectivity: supports remote monitoring and control through compatible gateways and IoT platforms.
Milesight D2D communication: enables direct interaction with compatible devices without requiring a LoRaWAN gateway for supported control functions.
Local data storage: stores up to 1,000 historical records with data retransmission and retrieval functions.
Safety and protection functions: includes freeze protection, child lock, temperature threshold alarms and anti-theft installation features.
Convenient configuration: NFC configuration through a mobile application or LoRaWAN downlink.
Building system integration: supports BACnet connectivity through compatible Milesight LoRaWAN gateways.
Remote maintenance: supports Firmware Update Over The Air (FUOTA) and multicast control.

Technical specifications

HVAC Control
Model	WT201
Compatible HVAC systems	Most compatible 24 VAC systems, including furnaces and air conditioners (2H/2C), heat pumps (4H/2C or 3H/2C + 1 AUX heat stage), boilers and PTAC
Temperature control modes	Heat, Emergency Heat, Cool, Auto
Fan modes	Auto, On, Circulate
Scheduling	7 working modes, up to 16 schedules per mode
Wire terminals	RC, RH, C, W1, W2/AUX, E, Y1, Y2/GL, G/GH, O/B, PEK, DI, GND
Relay specification	24 VAC, typical 150 mA, maximum 1 A
Digital input	1 × dry-contact input for physical switches or buttons
Additional HVAC functions	Local scheduling, freeze protection, fan delay, temperature control, dehumidification
Temperature and Humidity Sensors
Sensor technology	Digital CMOSens MEMS technology
Temperature range	-20°C to +60°C
Temperature accuracy	±0.5°C (0°C to +60°C); ±1°C (-20°C to 0°C)
Temperature resolution	Reported: 0.1°C; displayed: 0.5°C (0.5°F)
Humidity measurement range	0–100% RH
Humidity accuracy	±3% RH (40–85% RH); ±5% RH outside this range
Humidity resolution	Reported: 0.5% RH; displayed: 1% RH
Wireless Communication
Wireless technology	LoRaWAN, Milesight D2D
Frequency bands	IN865 / RU864 / EU868 / US915 / AU915 / KR920 / AS923-1, 2, 3, 4
Transmission power	16 dBm (868 MHz); 22 dBm (915 MHz)
Receiver sensitivity	-137 dBm
LoRaWAN mode	OTAA / ABP, Class C
Integration	Milesight Development Platform; BACnet via compatible Milesight LoRaWAN gateways
Display, Configuration and Data Management
Display	4.2-inch segmented LCD, white backlight
External controls	5 buttons for operating modes, temperature adjustment, fan mode and system functions
Configuration	NFC via mobile application, LoRaWAN downlink
USB interface	Internal USB Type-C for console access
Data storage	1,000 entries
Advanced functions	Threshold alarms, child lock, data retransmission, external sensor mode, Milesight D2D, multicast, FUOTA
Timekeeping	RTC backup for up to 72 hours without power
Physical and Environmental Characteristics
Power supply	24 VAC (±15%), typical 150 mA, maximum 1 A
Power consumption	Less than 1.2 W
Operating temperature	-20°C to +60°C
Relative humidity	0–95% RH (non-condensing)
Ingress protection	IP30
Housing material	PC + ABS (UL94 V0)
Dimensions	113 × 110 × 21 mm
Weight	172 g
Installation	Wall screw mounting
Regulatory approvals	FCC, ISED

WT201 and WT211 Model Comparison

The WT201 and WT211 share the same main thermostat functions, LoRaWAN communication features and environmental sensors. Their primary documented difference concerns the electrical ratings of their relay outputs and power supply.

Parameter	WT201	WT211
Relay voltage	24 VAC	24 VAC
Typical current	150 mA	1 A
Maximum current rating	1 A	3 A per channel; 5 A total
LoRaWAN communication	Supported	Supported
Temperature and humidity sensing	Integrated	Integrated
Display	4.2-inch LCD	4.2-inch LCD

Typical applications

Commercial building HVAC management: control and monitor heating and cooling systems across connected building installations.
Residential HVAC control: manage compatible 24 VAC heating and cooling systems using manual and scheduled temperature settings.
Hotel room temperature management: integrate with compatible room keycard switches and centralized control systems.
Building automation: integrate thermostat data and control functions into compatible LoRaWAN and BACnet environments.
Remote facility management: monitor indoor temperature and humidity, adjust thermostat settings and manage schedules through compatible connected platforms.

What should you check before choosing the WT201?

Before selecting the WT201, verify the compatibility of the existing 24 VAC HVAC system, the required heating and cooling stages, the wiring terminals and the relay current requirements.

For installations requiring higher relay current ratings, the WT211 should also be evaluated. The electrical requirements of the connected equipment must be checked before selecting either model.

For Canadian projects, confirm the appropriate US915 LoRaWAN configuration, network infrastructure and installation requirements. The WT201 is an IP30-rated wall-mounted thermostat intended for compatible indoor installations.

Frequently asked questions

Which HVAC systems are compatible with the WT201?

The WT201 supports a range of compatible 24 VAC HVAC systems, including furnaces, air conditioners, heat pumps, boilers and PTAC devices. Compatibility must be verified against the specific equipment and wiring configuration.

Can the WT201 operate with programmable schedules?

Yes. It supports seven working modes and up to 16 schedules per mode for automatic temperature management.

Does the WT201 measure temperature and humidity?

Yes. The thermostat includes integrated temperature and relative humidity sensors and displays the measurements on its 4.2-inch LCD screen.

Can the WT201 be integrated with BACnet systems?

Yes. BACnet integration is supported through compatible Milesight LoRaWAN gateways.

What is the difference between the WT201 and WT211?

The primary documented difference is the electrical current rating. The WT201 has a maximum rating of 1 A, while the WT211 supports up to 3 A per channel and 5 A total.

Why choose the Milesight WT201?

The Milesight WT201 Smart Thermostat combines configurable HVAC control, integrated temperature and humidity monitoring, programmable schedules and LoRaWAN connectivity in a compact wall-mounted device.

Its support for multiple HVAC configurations, remote management functions and building automation integration makes it a suitable option for connected temperature control in residential and commercial buildings.

Technical support from ES Canada

ES Canada supports Canadian customers in selecting Milesight LoRaWAN thermostat and building monitoring solutions according to HVAC compatibility, wireless infrastructure and installation requirements.