Robust weatherproof solar powered weather station. Uploads to Weather Underground via WiFi.
Redneck project by a redneck team.
Automated soil moisture management
Check and control the temperature of your home from your Android phone and shut off the heating remotely (Now with installable app!).
A physical notebook about tides and tidepools with a Spark Core inside to retrieve and display tide levels in the SF Bay Area.
How to build a DIY Wi-Fi gas detector that sends SMS alerts using a Particle Photon, a gas sensor and a buzzer