To measure Weather, you need specialized sensors. The SwitchDoc Labs WeatherRack contains the three most important components: Wind Speed, Wind Direction and Rainfall. This product can be interfaced into your own project, but the SwitchDoc Labs WeatherPiArduino and WeatherPlus boards are specifically designed for the WeatherRack.
The SwitchDoc Labs WeatherRack Sensors provide a suite of weather sensors for use by Arduino and Raspberry Pi based small computers. It can also be used to connect with other computers and systems. It includes a Wind Vane, Anemometer and a tipping bucket Rain Gauge. Mounting hardware and a metal mast is also included. The included wires are terminated in RJ11 plugs. The Specification is below. The WeatherRack is compatible with the SwitchDoc Labs WeatherPiArduino
Weather Station Interface Board available on SwitchDoc.com. If you combine it with the SwitchDoc Labs WeatherPiArduino
board (available on SwitchDoc.com) you can add a Barometer, Temperature Sensors, Real Time Clock, and optionally: Lightning Sensor / Humidity / ADC.
The WeatherRack sensors contain no active electronics. The sensors use sealed magnetic reed switches and magnets to take readings. A voltage must be supplied to each sensor to take a reading.
An Instructable for Building a Complete Raspberry Pi Weather Station using the WeatherRack
Downloads For WeatherRack
To Set North on Wind Vane
Wind Vane screw Should Point North - This is South[/caption] North is the screw hole on the base (without the tab).
On newer units, there is a tiny little S near the top of the round base of the wind vane and a small N on the other side.
Another way you can calculate it is hand setting the wind vane to north, reading from the software, and marking the base to indicate North.
If you accidentally mount it incorrectly, you can always adjust the direction in software.