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Meet the WT102 LoRaWAN Smart Radiator Thermostat

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Milesight WT102 LoRaWAN Smart Radiator Thermostat – Follow‑Along Training Guide

Forest Rock Knowledge Base Edition
Video Reference: https://www.youtube.com/watch?v=vomkidfFbxU

OVERVIEW
WT102 is a LoRaWAN® radiator thermostat designed to help manage the heating control system. It uses thermal energy harvesting to power itself, eliminating the need for battery replacement or a wired power connection, thus reducing maintenance costs. With one preset date period and up to 16 customized heating plans, it enables the smart management of the heating system. WT102 is a smart and highly environmentally-sensitive product. Abnormal temperature difference and extremely low temperatures can quickly trigger it, prompting fast corrective action by adjusting the valve opening.

Compliant with Milesight LoRaWAN® gateway and Milesight Development Platform solution, WT102 is able to work with the WT401 wireless thermostat to achieve remote linkage control.

The device has the following features:

  • Built-in temperature sensor with support for external NTC sensor or WT401 wireless thermostat connection enables environmental detection and accurate control

  • Intuitive, direction-adjustable LED display suitable for various installation environments

  • Maintenance-free, self-powered by temperature difference with no battery replacement required

  • Equipped with NFC for one touch configuration

  • Up to 16 heating plans within one preset Date Period

  • Supports open-window detection and freeze protection

  • Supports the child lock function and anti-theft installation for safety reasons

  • Stores historical records locally and support retransmission to prevent data loss

  • Function well with standard LoRaWAN® gateways and network servers

  • Compatible with BACnet system via Milesight LoRaWAN® gateways

  • Compatible with Milesight Development Platform

  • Supports multicast for control in bulk

  • Support Firmware Update Over the Air (FUOTA) featureThis knowledge base is compiled from the Milesight video series. For the latest videos and updates, visit the Milesight YouTube channel.

NOTE:
If you want to watch the video while following along with the Forest Rock generated training notes, then right click and open the video link in a new split screen window and the video should appear on the right of the notes so that you can follow along.

This guide assists engineers in following the Milesight WT102 product video with timestamped notes, technical references, and device comparison tables.
It is designed to support bench testing, commissioning, and deployment planning.

1. Video Timeline – Key Learning Points

0:01 – 0:10 | The Problem

  • Traditional TRVs require frequent battery changes.

  • Maintenance becomes costly in multi‑room or hard‑to‑reach deployments.

0:10 – 0:24 | Introducing WT102

  • WT102 uses thermoelectric energy harvesting from radiator heat vs. air temperature.

  • Results in near zero‑maintenance operation.

  • Up to 2 years standby when radiators are off and no heat is available

  • Can be recharged with a standard USB-C power source and cable

0:24 – 0:33 | Smart Temperature Control

  • Built‑in temperature sensor.

  • Adaptive algorithms for comfort + reduced energy waste.

0:33 – 0:41 | Robust Metal Design

  • Metal enclosure designed for resilience.

  • Ideal for schools, hospitals, and public areas.

0:41 – 0:52 | Local & Remote Control

  • High‑definition LED display.

  • Minimalist control panel.

  • Precise local setpoint adjustment.

0:52 – 1:06 | Local Scheduling

  • Create up to 16 heating schedules within one date‑period template.

  • Operates standalone once configured.

1:06 – 1:19 | LoRaWAN Class B

  • Faster command response than Class A.

  • Integrates with:

    • Niagara N4

    • Forest Rock LoRa driver

    • TTN / ChirpStack / Milesight Cloud

1:19 – 1:26 | DtoD with WT401

  • Device‑to‑Device pairing for same‑room temperature control.

  • REDUCES gateway dependency or latency.

1:26 – 1:32 | Open‑Window Detection

  • Sudden temperature drop triggers anti‑waste behaviour.

  • Valve avoids reopening fully after temperature dip.

1:32 – 1:46 | Frost Protection

  • Approaches 3°C → valve opens automatically.

  • Prevents pipe freezing and asset damage.

1:46 – 2:00 | Product Summary

  • Maintenance‑free

  • Long‑life

  • Energy‑efficient

  • Ideal for estate‑level deployments

2. Comparison: WT102 vs WT101


WT102 (Energy Harvesting)

WT101 (Battery Powered)

Power Source

Thermal energy harvesting (no batteries)

AA batteries

Maintenance Load

Zero

Battery replacement cycle

LoRaWAN Class

Class B

Class A

Display

High‑definition LED

LCD

Body Material

Metal

Plastic

Scheduling

Up to 16 schedules

Basic scheduling

Valve Torque

Higher torque

Medium torque

Best Use Cases

Schools, hospitals, social housing

Residential & light commercial

Frost/Open‑Window

Yes

Yes

DtoD Support

Yes (with WT401)

Limited

3. DtoD‑Compatible Devices

DtoD allows sensors and thermostats to communicate directly, without round‑trips via the gateway.
Useful for real‑time control in a single room/zone.

Compatible Devices:

WT401 Smart Thermostat

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  • Primary interface for users of a particular room or zone

  • Controls multiple TRVs in a single zone

Room Environmental Sensors

  • AM103L / AM307 (Temp/Humidity/CO₂)

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    AM103L
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AM307

  • VS121 People Counter (for occupancy‑based temperature reduction)

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    VS121

Occupancy & PIR Sensors

  • WS202 PIR / Light Sensor

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    WS202

  • Supports enhanced open‑window logic

  • WS301 Door/Window Sensor

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    WS301

5. Additional Resources