A session should last at least 150 seconds to get correct sensor data. Make sure your sessions are not too short. The result should normally appear in the app within a few seconds, but in some rare cases it may take several minutes to get the data.

If there is still no data being shown or recorded in the Glimp app during your Pebbles usage, follow these steps to troubleshoot the issue:

1. Restart the app: If there is an API error occurs, restarting the Glimp app will fix the problem. Some time is needed to process the results.
2. Check Connectivity: Ensure that your Pebbles are properly connected to your smartphone via Bluetooth. The app needs an active connection to receive and record data.
3. Proper Thumb Placement: During use, ensure your thumb is properly and firmly placed on the PPG sensor. Incorrect positioning can result in the app not receiving accurate data.
4. Clean the Sensor Area: Ensure that the PPG sensor, located where your thumb rests on the left Pebble, is clean and free from any dirt or obstructions. Gently wipe it with a soft, dry cloth.
5. Check PPG Sensor Functionality: Ensure that the PPG sensor, located where your thumb rests on the left Pebble, is functioning properly. The small LED on the sensor should flash in green. If you do not see the LED lights, try fully charge your Pebbles and/or restart your device.  If the issue still isn't resolved, please seek help from the Glimp support team.
6. Check if there is a firmware update needed: Open the Glimp app and check for any notifications related to firmware updates. If so, please follow the instructions to update the Pebbles' firmware, and restart the Pebbles and app. Keeping the Pebbles' firmware up to date is crucial for optimal performance. Outdated firmware can lead to functional irregularities, including sensor issues.

If you've tried these steps and there is still no data shown in the app, it's best to contact Glimp's customer support for further assistance. We can provide more in-depth troubleshooting or advise on the next steps, possibly including a warranty claim if necessary.

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