Ultrasonic 7-in-1 RS485 Weather Sensor

1. Example Code for Arduino-7-in-1 Weather Station Data Reading

This project demonstrates how to use an Arduino board with the RS485 7-in-1 Weather Station Sensor to read and print meteorological parameters including wind speed, wind direction, temperature, humidity, atmospheric pressure, light intensity, and rainfall. Users will learn how to establish RS485 communication using a Modbus-RTU protocol, send sensor-specific commands, and parse the returned data to obtain meaningful environmental measurements.

Reference

This article delves into the Modbus-RTU communication protocol, detailing its parameters, data frame format, register addresses, and calibration methods for sensor networks.

Parameter	Details
Power supply voltage	DC10~30V
Working current	<10mA
Output mode	RS485
Measurement elements	ultrasonic wind speed and direction, temperature, humidity, atmospheric pressure, light, rainfall
Measurement range	- Wind speed: 0~40m/s, start wind speed 0.5m/s - Wind direction: 0~359° - Humidity: 0~99%RH - Temperature: -40°C~80°C - Atmospheric pressure: 0~120kPa - Light: 0~200000Lux - Rainfall: ≤4mm/min
Measurement accuracy	- Wind speed: ±0.5+2%FS (60%RH, 25℃) - Wind direction: ±3° (60%RH, 25℃) - Humidity: ±3%RH (60%RH, 25℃) - Temperature: ±0.5℃ (25℃) - Atmospheric pressure: ±0.15kPa (101kPa, 25°C) - Light: ±7% (25℃) - Rainfall: ±4%
Response time	- Wind speed: 1s - Wind direction: 1s - Humidity: ≤25s - Temperature: ≤8s - Atmospheric pressure: ≤2s - Light: ≤2s
Long-term stability	- Humidity: ≤1%/y - Temperature: ≤0.1℃/y - Atmospheric pressure: -0.1kPa/y - Light: ≤5%/y
Protection level	IP54
Housing material	ABS polymer plastic
Sensor cable length	14cm
Adapter cable length	150cm

Num	Label	Description
Brown line	VCC	Power input positive pole, DC10-30V power supply
Black line	GND	Power ground wire
Yellow line	485-A	RS485 data line A
Blue line	485-B	RS485 data line B

Ultrasonic 7-in-1 RS485 Weather Sensor

Specification

Pinout