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The SparkFun Photon Weather Shield is an easy to use add-on board that grants you access to barometric pressure, relative humidity, and temperature. There are also connections on this shield to optional sensors such as wind speed, direction, rain gauge and soil readings!

These Weather Shields utilize the HTU21D humidity and MPL3115A2 barometric pressure sensors. Each shield comes with two RJ11 connectors (for optional hook up of rain and wind sensors) and a 3-pin soil temperature and moisture hookups. Finally, each Weather Shield can attach effectively and easily to your Photon in no time at all!

The Particle Photon is a tiny WiFi development kit for creating connected projects and products. Sporting a 120Mhz ARM Cortex M3 and built-in WiFi, the Photon is not only powerful, but easy to use. The small form factor is ideal for IoT projects with cloud-connectivity.

Note: Not only can this shield operate with the Photon, it can also be used with the Particle Core! We understand that there are a ton of you out there who still haven’t been able to get your hands on a Photon yet and would like to start playing with this shield now. If that person is you we hope we have obliged!



  • Humidity/Temperature Sensor - HTU21D
  • Barometric Pressure - MPL3115A2
  • Headers and Connectors Pre-Soldered
  • Compatible with the Photon and the Core


Smarter Irrigation Controller
  • 268
  • 1

Work in progress

Enhanced algorithm to control the disabling of an irrigation system based on multiple sensor input and future rain fall amounts.

ThingSpeak Weather Station & Data Analysis
  • 8,140
  • 52

Full instructions

Building your own portable weather station and analyzing weather data in the cloud.

Multiple mode Environmental Sensor Deck with MKR1000
  • 7,376
  • 37

Full instructions

Many fun environmental sensors need a hardware interrupt. With the MKR1000, you no longer need to choose! You get I2C, analog ins too!

Climate Dashboard
  • 3,082
  • 26

Full instructions

Create dashboard to monitor conditions using Structure and Particle Photon.

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