Start here: make sure the SugarPixel app is up to date in the App Store or Play Store, and that your SugarPixel Mini/Classic has the latest firmware installed. See Firmware Update.
Previously connected, but no longer shows
Most commonly, Disconnect wasn’t tapped after the last session. The app isn’t designed to stay connected.- Unplug SugarPixel Mini/Classic
- Plug it back in to reboot
- Open the app and reconnect