Description: The 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.
These Weather Shields utilize the HTU21D humidity, MPL3115A2 barometric pressure, and ALS-PT19 light sensors and relies on the HTU21D and MPL3115A2 Arduino libraries. Each shield comes with two unpopulated RJ11 connector spaces (for optional hook up of rain and wind sensors) and a 6-pin GPS connector (for optional hook up 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 related items or wish list below!
Based on 2 ratings:
I have just completed interfacing the WS to a chipKIT Pro MX7 mostly because I wanted to look at the sensor performance. The pressure sensor requires some tuning of the I2C register read function in that there is a delay between when the pressure sensor is commended to take a measurement and when the data is available. The Hold mode doesn’t appear to work at all. To use the No Hold mode, I needed to inset a 50 ms delay between writing the command and reading the measurement. The barometer reads about 2.56 in Hg low. The humidity sensor reads about 3% RH low The temperature measurements between the pressure sensor and the humidity sensor differ by 1 degree F and both read about 6 degrees F high. This may be due to my hardware configuration. These sensor measurements were compared to a General Eastern Model 900 Thermal-Hygrometer.
The light sensor doesn’t appear to have much functionality since the WS circuit board cannot be exposed to the outside environment.
The bottom line is that I believe I will bet better results using sensors packaged individually but it was fun to play with.
Hi, Thanks for the feedback. We have used these in long term outdoor projects (https://learn.sparkfun.com/tutorials/weather-station-wirelessly-connected-to-wunderground?_ga=1.22051570.833401513.1365169143) however, you do need to take specific consideration to how the device is housed outdoors. You could certainly build a system using individual components as well if that’s feels more user friendly. Happy hacking!
Note that if you plan to use this in conjunction with the XBee Shield there are some pin conflicts. The XBee Shield uses pins 2 and 3 for serial communication and the Weather Shield uses pins 2 and 3 for the rain and wind gauges. If you don’t plan to use the rain and wind gauges then it “just works”, but if you install the rain or wind gauges then you’ll have to move the serial communication of the XBee to different unused pins.