Ecowitt WN90LP Modbus weather station template | ModbusCloud
Modbus TCP
Ecowitt WN90LP Modbus
Ecowitt
Integrates Ecowitt WN90LP wired Modbus weather station via RTU to TCP gateway.
Overview
Template for the Ecowitt WN90LP wired Modbus weather station. Reads temperature, humidity, wind speed and direction, rainfall, light intensity, UV index, and absolute pressure via Modbus TCP using an RTU to TCP gateway.
Key readings
Temperature
Humidity
Wind Speed and Gust
Wind Direction
Rainfall and Rain Counter
Light, UVI, ABS Pressure
Use cases
Monitor outdoor temperature and humidity on a live cloud dashboard for building management.
Log wind speed and gust data over time to assess rooftop conditions for solar panel installations.
Create an alert when UV index exceeds a defined threshold to notify facility managers.
Track cumulative rainfall using the rain counter to support irrigation or drainage planning.
Combine light intensity readings with solar inverter data to evaluate PV system performance ratios.
Set up notifications when barometric pressure drops sharply, indicating approaching storm conditions.
Installation
1Mount the Ecowitt WN90LP outdoors according to the manufacturer's installation guide and run the RS485 wiring to your equipment cabinet.
2Connect the RS485 A and B lines from the WN90LP to an RTU to TCP gateway, ensuring correct polarity.
3Configure the RTU to TCP gateway with serial parameters: 9600 baud, 8 data bits, no parity, 1 stop bit.
4Verify the WN90LP Modbus address is set to 144 decimal (0x90 hex), which is the factory default.
5Connect the ModbusCloud gateway (MCG or MLP series) to the same IP network as the RTU to TCP gateway.
6Import the Ecowitt WN90LP template in the ModbusCloud platform and assign the correct IP address and port of the RTU to TCP gateway.
Things to watch for
Registers (10)
10 read / 0 write
Name
Address
Function
Type
Unit
Access
Humidity
360
FC03
int16
%
R
Light
357
FC03
uint16
Lux
R
Temperatur
359
FC03
int16
°C
R
Wind Speed
361
FC03
int16
m/s
R
Wind Gust
362
FC03
int16
m/s
R
Wind Direction
363
FC03
int16
°
R
Rainfall
364
FC03
int16
mm
R
ABS Pressure
365
FC03
int16
hPa
R
RainCounter
366
FC03
int16
mm
R
UVI
358
FC03
uint16
R
Use directly in ModbusCloud
Import this template into your own portal with one click, or get in touch for installation support.
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