Ultrasonic 9-in-1 RS485 Weather Station Sensor for Arduino

The ultrasonic 9-in-1 weather station from DFRobot measures wind speed, wind direction, temperature, humidity, air pressure, light intensity, noise and particulate matter PM2.5 and PM10 in one device. Wind is measured with four ultrasonic probes without moving parts, which saves maintenance and on-site calibration. The UV-resistant ABS housing is protected to IP54. The values come via RS485 with Modbus-RTU, the supply is 10 to 30 V DC; there is an Arduino example from DFRobot.

Recommended Accessories:

• DFRobot RS485-to-UART Module with Active Isolation
• USB to RS485 Converter Module
• Universal plug-in power supply 3–12V DC 1000mA
• DC Socket Female Barrel Jack 5.5mm / 2.1mm with Screw Terminals

Features:

• Wind 0 to 40 m/s (start 0.5 m/s), ±(0.5 m/s + 2 % FS); direction 0 to 359°, ±3°
• Temperature -40 to 80 °C, ±0.5 °C; humidity 0 to 99 % RH, ±3 % RH
• Air pressure 0 to 120 kPa, ±0.15 kPa; light 0 to 200000 lux, ±7 %
• Noise 30 to 120 dB, ±0.5 dB (94 dB at 1 kHz)
• Particulate matter PM2.5 and PM10 each 0 to 1000 µg/m³, ±3 % FS at 100 µg/m³, response time up to 90 s
• No rain gauge
• RS485 with Modbus-RTU, factory address 1, 4800 baud (1200 to 115200 baud selectable)
• Polling interval and waiting time at least 200 ms each; use a 120 Ω termination on long lines (DFRobot FAQ)
• Cable: brown VCC (10 to 30 V), black GND, yellow RS485-A, blue RS485-B
• Clean the lower measuring surface of dust regularly (DFRobot)

Application Examples:

• Weather station for garden, roof or school
• Ventilation and irrigation in the greenhouse based on weather data
• Measuring point with LoRaWAN node or PLC
• Air quality and noise on streets and squares

Documentation:

• Wiki DFRobot SEN0658
• Arduino example (DFRobot Wiki)
• Modbus registers and settings (DFRobot Wiki)
• Dimension drawing

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: SEN0658
• Supply: 10 to 30 V DC
• Current consumption: 50 mA (wiki)
• Interface: RS485, Modbus-RTU, address 1, 4800 baud factory setting
• Wind speed: 0 to 40 m/s, ±(0.5 + 2 % FS), response time 1 s
• Wind direction: 0 to 359°, ±3°, response time 1 s
• Temperature: -40 to 80 °C, ±0.5 °C
• Humidity: 0 to 99 % RH, ±3 % RH
• Air pressure: 0 to 120 kPa, ±0.15 kPa, response time 2 s
• Light intensity: 0 to 200000 lux, ±7 %, response time 2 s
• Noise: 30 to 120 dB, ±0.5 dB, response time 1 s
• PM2.5 and PM10: 0 to 1000 µg/m³, ±3 % FS (100 µg/m³), counting efficiency 50 % at 0.3 µm, 98 % from 0.5 µm, response time up to 90 s
• Long-term stability: humidity ≤1 %, temperature ≤0.1 °C, noise ≤3 dB, PM ≤1 % per year
• Protection class: IP54
• Housing: ABS, UV-resistant
• Cable: 14 cm on the sensor, adapter cable 150 cm
• Dimensions: 240 × 96 × 96 mm
• Weight: 717 g

Scope of Delivery:

• 1× ultrasonic weather station 9-in-1 RS485
• 1× adapter cable 150 cm