If your sensor fails to connect on activation, try to activate the sensor again to wake it up. Please remember the sensor will not flash until the activation is completed. If the activation continues to fail, you will need to uninstall the app and reinstall the app.  Then walk through the activation process again. 

• Uninstall the app. 
• Reinstall the app from the App Store.
• Open the app and Login. 
• Tap on the menu. 
• Go to My Sensor. 
• Tap on Add a Sensor.
• Scan or Type Serial #.  If having problems tap on Having Trouble?
• Shake sensor until it connects (should connect within 5-10 seconds) 

If still having issues, please contact customer support.