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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.
If your follower app shows current readings but SugarPixel Mini/Classic is delayed more than 15 minutes (and not showing blue), this usually indicates a WiFi network issue — most commonly mesh networks or WiFi extenders. If you use:
  • A mesh WiFi system (multiple small nodes around your home), or
  • WiFi extenders
These setups can prevent stable communication even if other devices appear to work normally. Set up a 2.4 GHz Guest Network using the guest network steps in the WiFi Error Messages troubleshooting page, then connect SugarPixel Mini/Classic to that network. This resolves the issue in most cases.