The SparkFun Photon Weather Shield is an add-on board for the Particle Photon (and Core) that provides onboard barometric pressure, relative humidity, and temperature sensing. With connections for optional wind speed, wind direction, rain gauge, and soil sensors, it's a complete platform for building a WiFi-connected weather station.

The shield features pre-soldered headers and connectors for quick assembly — just stack it onto your Photon and start collecting environmental data. Combined with the Photon's built-in WiFi and cloud connectivity, you can push weather readings online with minimal setup.

Key Features

• HTU21D Sensor – Measures relative humidity and temperature
• MPL3115A2 Sensor – Measures barometric pressure and altitude
• 2× RJ11 Connectors – For optional wind and rain gauge sensors
• 3-Pin Soil Hookup – For soil temperature and moisture sensors
• Pre-Soldered Headers – Ready to stack onto Photon or Core
• Compatible with Photon & Core – Works with both Particle boards

Ideal For

• WiFi-connected weather stations
• Environmental monitoring and data logging
• IoT climate and agriculture projects
• Cloud-connected sensor networks

Package Contents

• 1× SparkFun Photon Weather Shield

Resources

• Hookup Guide
• Photon Development Guide
• HTU21D Datasheet (PDF)
• MPL3115A2 Datasheet (PDF)
• Schematic (PDF)
• Particle Library (GitHub)
• Design Files (GitHub)