The Milesight WT211 is a LoRaWAN smart thermostat for the wireless control and monitoring of 24-volt AC HVAC systems in buildings. The device is mounted on the wall with screws and connected directly to the existing wiring via standard terminals. Key technical features at a glance:
- Compatibility: Works with most systems, including boilers and air conditioners (2H/2C), heat pumps (4H/2C or 3H/2C with single-stage auxiliary heating), boilers and PTAC units, so no additional relay hardware is required for most installations.
- Scheduling and Remote Control: Supports up to 16 schedules per mode across 7 operating modes and enables remote management via the cloud, reducing the need for manual on-site adjustments.
- Built-in Sensors and Display: The built-in temperature and humidity sensor, combined with the 4.2-inch LCD display, continuously shows the current room conditions, eliminating the need for a separate sensor for basic environmental monitoring.
The WT211 operates as a Class C device and supports the Milesight D2D protocol, which enables direct device-to-device control without a gateway for time-critical commands. It is compatible with standard network servers, the Milesight development platform, and BACnet systems. Configuration is possible via NFC using a mobile app, and firmware updates are supported wirelessly. The WT211 is suitable for hotels and commercial buildings where centralized management across multiple rooms is required.
| Equipment | |
|---|---|
| sensors | ambient temperature, air humidity |
| antenna | internal |
| Communication | |
| frequency | EU868 |
| connectivity | LoRaWAN |
| activation | OTAA |
| interfaces | App, Downlink |
| Power supply | |
| power supply | mains voltage |
| Certifications | |
| enclosure protection class | IP30 |
| Others | |
| Brand | Milesight |
The thermostat is compatible with most 24VAC HVAC systems, including furnaces, air conditioners, heat pumps, boilers, Air Handling Units (AHU), and Packaged Terminal Air Conditioners (PTAC). It supports up to 2 heating and 2 cooling stages for furnaces and air conditioners. For heat pumps, it supports configurations of up to 4 heating and 2 cooling stages, or 3 heating and 2 cooling stages plus 1 stage of auxiliary heat.
Yes, it includes a digital input (DI) for dry contacts, which allows for seamless integration with hotel keycard switches or magnet switches to manage HVAC usage based on occupancy.
The thermostat offers four temperature control modes (Heat, Emergency Heat, Cool, and Auto) and three fan options (Auto, On, and Circulate).
Using digital CMOSens technology, the device provides a temperature accuracy of ±0.9°F within the 32°F to 140°F range and ±1.8°F from -4°F to 32°F. Humidity accuracy is ±3% RH between 40% and 85% RH, and ±5% RH outside of that range.
The device can be configured wirelessly using NFC via a mobile application or remotely through LoRaWAN downlinks.
The thermostat includes advanced features such as a child lock to prevent unauthorized changes, freeze protection, threshold alarms, and local control scheduling.
Yes, it is equipped with a Real-Time Clock (RTC) capable of keeping the time accurate for up to 72 hours without an active power supply.