The SparkFun Weather Shield is an easy-to-use Arduino shield that grants you access to barometric pressure, relative humidity, luminosity and temperature. There are also connections on this shield to optional sensors such as wind speed, direction, rain gauge and GPS for location and super accurate timing.
The Weather Shield utilizes the Si7021 humidity/temperature sensor, the MPL3115A2 barometric pressure sensor and the ALS-PT19 light sensor. The shield relies on the Si7021 and MPL3115A2 Arduino libraries.
Each shield comes with two unpopulated RJ11 connector spaces (for optional hookup of rain and wind sensors) and a 6-pin GPS connector (for optional hookup of a GP635T GPS module). Finally, each Weather Shield can operate from 3.3V up to 16V and has built-in voltage regulators and signal translators.
Note: The Weather Shield comes as a stand-alone board. Headers, connectors and additional sensors will need to be purchased separately; check the Wish List below or the Recommended Products on this page.
Note: This shield was designed for the SparkFun RedBoard and Arduino Uno and will not work with other boards (like the Arduino Yun, for example) without modification.
If you are finding that the barometric pressure readings you are getting are off, you may need to correct pressure for altitude. For instance, In Denver, if the pressure is measured by NOAA 29.92"Hg it’s already been corrected for altitude. The weather shield is going to read actual pressure, not pressure that has been corrected for altitude and you should expect to see a reading of about 24.73"Hg. Below is a link to a calculator that will give you a correction factor for whatever altitude your station is at. Link to calculator
Based on 1 ratings:
Quick delivery and good support documentation had my weather shield up and running very quickly with no problems. The website with good explanation of features and links to references makes this a project that quickly shows results.