Only 2 mounting blocks for 3 modules (anemometer, vane, rain)? Check manual.

Name: Weather Station Kit with Anemometer/Wind Vane/Rain Bucket
Brand: DFRobot
SKU: SEN0186
Price: 138 USD
Availability: InStock
Rating: 5.00 (2 reviews)

There are two ports under the anemometer, you need to connect the anemometer to the wind direction and then connect to the adapter board.

Weather Station Kit with Anemometer/Wind Vane/Rain Bucket

$138.00

SKU: SEN0186

IoT weather station kit with anemometer, wind vane, and rain bucket. Compatible with Arduino, used for monitoring wind/rain in various applications.

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Introduction

Ever want to build your own weather station? This IoT weather station kit includes an anemometer, wind vane, and rain bucket. The serial communication method provides good compatibility and makes it easy to use with most controllers in the market.

Together with other components, this IoT weather station kit can be widely used in measuring wind/rain in engineering, railways, docks, power plants, meteorological, cableway, environment study, agriculture, energy monitoring, health study with corresponding signal output.

Also, it is compatible with Arduino devices.

Weather Station Kit with Anemometer/Wind Vane/Rain Bucket

Version Update (2016/3/28): Upgrade the Temperature and Humidity sensor, the range and accuracy will be improved.

Метеостанция для arduino : герконы рулят

Project 1: Make Your Own Arduino Weather Station
This durable Arduino weather station kit includes an anemometer, wind vane, rain bucket and DH11 temperature and humidity sensor. It can transmit data via serial or RF interfaces.

Hardware List:
LCD12864 Shield for Arduino
Weather Station Kit with Solar Panel
Weather Station Kit with Anemometer/Wind Vane/Rain Bucket
Bluno M3 - A STM32 ARM with Bluetooth 4.0 (Arduino Compatible)