Welcome to Cayenne!
- Yep, just click the magnifying glass in the top right on the page to search the forums.
- Currently custom widgets for the Pi are not supported, however, you can use the MQTT API documented here: Cayenne Docs
- The ESP8266 is not currently officially supported, but you can add it to the dashboard just fine (and add custom widgets) Esp8266 - #20 by kreggly