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Temperature sensor

Milesight WT401 LoRaWAN decoder and payload format

The Milesight WT401 is a LoRaWAN temperature sensor that reports valve position, motion and temperature. It is rated IP30 and it works from -20 to 60 °C.

Milesight WT401
Official decoderDatasheetPartner page

Payload format

An uplink from the device as it arrives at the network server, and what the official decoder returns for it. Examples come from the decoder's own test cases.

Example 1 · fPort 85

Payload (hex)

00 64 01 10 0E 02 30 02 03 02 05 01

Decoded (JSON)

{
  "battery": 100,
  "temperature": 36,
  "humidity": 56,
  "temperature_control_mode": "cool",
  "execution_plan": "plan_2"
}
FieldValue
battery100
temperature36
humidity56
temperature_control_modecool
execution_planplan_2

Specifications

Manufacturer
Milesight
Model
WT401
Type
Temperature sensor
Measures
valve position, motion, temperature
Protection
IP30
Operating temperature
-20 … 60 °C
LoRaWAN regions
EU863-870, US902-928, AU915-928, AS923, CN470-510, KR920-923, IN865-867, RU864-870

Connect it to Cloud Studio IoT

  1. 1

    Register the device in your network server

    Add it to The Things Stack, ChirpStack, Actility ThingPark or LORIOT with its DevEUI, JoinEUI and AppKey and the frequency plan of your region.

  2. 2

    Apply the decoder

    In The Things Stack, pick the model from the device repository and its decoder is applied for you. In ChirpStack v4, paste the official decoder as the device profile's JavaScript codec.

  3. 3

    Connect the network server to Cloud Studio IoT

    Set up the integration once per network server; every device registered there then reaches Cloud Studio IoT with its decoded values.

  4. 4

    Build dashboards and alarms

    The decoded fields become device variables for dashboards, alarms by email or SMS, and scheduled reports.

See your Milesight WT401 on a dashboard

Start a free trial, add the device with its DevEUI and get dashboards and alarms from its next uplink.

Talk to us

Frequently asked questions

Device facts and decoder examples: The Things Network Device Repository (Apache-2.0) · commit 7693223, imported 2026-10-05.