The WT401 is a LoRaWAN® wireless smart thermostat designed to help with managing heating and climate control systems. With integrated temperature, humidity and occupancy sensing, multiple operation modes and long battery life, it enables intelligent temperature control while helping to reduce unnecessary energy costs.

The WT401 is a smart and highly flexible wireless thermostat that can quickly respond to changes in the environment. It intelligently regulates HVAC systems or radiators (with compatible controllers) to maintain comfort and efficiency.

Compliant with standard LoRaWAN® gateways and network servers, users can remotely control room temperature and system behaviour via web platforms or mobile applications.

Features

• Supports Heat, Cool, Auto and Emergency Heat modes
• Built-in temperature, humidity and PIR occupancy sensors
• 2.7″ low-power e-ink display showing room and system status clearly
• Multiple fan modes, including Auto operation
• Occupancy-based temperature control for energy saving
• Supports long-life battery power for wire-free installation
• Multiple power supply options, including 24 V AC/DC and USB-C
• Allows manual or automatic temperature adjustment with working plans
• Easy configuration via NFC or Bluetooth
• Function well with standard LoRaWAN® gateways and network servers
• Compatible with BMS systems via Milesight LoRaWAN® gateways
• Supports multicast control and Firmware Update Over-the-Air (FUOTA)
• Includes a child lock to prevent unintended operation

Technical Specifications

Wireless

• Technology: LoRaWAN®
• Frequency: EU868 / US915 / AU915 / AS923 / IN865 / KR920 / RU864
• Tx Power: 16 dBm (868 MHz), 22 dBm (915 MHz)
• Sensitivity: −137 dBm
• Device Class: Class A / Class C
• Activation: OTAA / ABP

Sensors

• Temperature Range: −20 °C to +60 °C
• Temperature Accuracy: ±0.2 °C typical
• Humidity Range: 0–100 % RH
• Humidity Accuracy: ±2 % RH typical
• Occupancy Sensor: PIR, up to 6 m detection distance

Display & Controls

• Display: 2.7″ Black & White E-ink
• Buttons: 5 physical buttons
• LED Indicator: Power / Reset

Power

• Battery: 2 × 2700 mAh ER14505 (replaceable)
• Battery Life: Up to 5.2 years (Class A, EU868, SF7)
• Alternative Power Options: 24 V AC/DC, USB-C (5 V), PowerBus via HVAC controller

Physical

• Dimensions: 86 × 86 × 24 mm
• Installation: Wall-mounted
• Wall Box Compatibility: 60 mm / 86 mm / 118 mm / 120 mm
• Material: PC + ABS (UL94 V0)
• Ingress Protection: IP30

Typical Applications

• Commercial offices
• Hotels and hospitality
• Retail environments
• Smart buildings
• BMS-integrated HVAC systems
• Radiator control (via Milesight WT101 / WT102)

The WT401 is ideal for scalable, wireless temperature control, offering flexibility for both new installations and retrofit projects.

Delivery & Support

Delivery Information

For UK clients, we deliver all goods ordered by 14:00 on the next working day.

Support

If you have any questions about this product or need guidance choosing the right solution, our technical sales team is here to help. You can also explore detailed resources on our downloads site.