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Note: You cannot connect a sensor that is charging or has a drained battery and is not blinking. The sensor must blink blue and another color to connect to the app.

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Important: The app must be allowed to run in the background on your phone. Otherwise, it cannot receive data from the sensor or store it in the cloud when you turn off the screen or open another app.

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If you encounter issues connecting an Android phone to a HAVS Protect sensor, follow these steps to troubleshoot:

1. Check Bluetooth Settings

• Turn on Bluetooth:
  • Ensure Bluetooth is enabled on your phone:
    • Go to Settings > Connections > Bluetooth (or similar, depending on your device).
    • If it is turned off, enable it.
• Find the HAVS Protect Sensor:
  • Look for the sensor in the list of available devices under Bluetooth settings.
  • Alternatively, check the sensor list in the HAVS Protect app (on the "Connect Sensor" page).

2. Check Location Settings (Older Android Versions)

Location permission is required on older Android versions (API < 31) as a security measure to protect user privacy.

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Note: No location data is stored or used; this is an Android system requirement for older versions.

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• Enable Location Services:
  • Go to Settings > Location.
  • Ensure location services are enabled.
  • Select mode: "High accuracy" is recommended.
• Grant Location Permission to the App:
  • Go to Settings > Apps > [Your App] > Permissions.
  • Ensure Location is allowed (select "Allow all the time" if possible).

3. Check Bluetooth Permissions

Android 12 and later require new permissions for BLE functionality.

• Grant Bluetooth Permissions:
  • Go to Settings > Apps > HAVS Protect > Permissions.
  • Ensure the following permissions are enabled:
    • BLUETOOTH_SCAN – to scan for BLE devices.
    • BLUETOOTH_CONNECT – to connect to BLE devices.
    • BLUETOOTH_ADVERTISE – if the app needs to advertise a BLE service (less common).

4. Ensure Device Compatibility with BLE

Not all Android devices support BLE. Verify the following: