Bluetooth sensor will not connect or disconnects frequently

If your heart rate monitor, power meter, or speed/cadence sensor is not connecting or drops connection during rides, check the following common causes:

1. Ensure the sensor isn't paired to your phone's OS Bluetooth menu: BLE fitness sensors must connect directly inside the SuperCycle app, not through your phone's general Bluetooth settings. If paired in iOS Settings → Bluetooth or Android Bluetooth Settings, select "Forget Device".
2. Verify Bluetooth (BLE) support (No ANT+): ANT+ is not supported. SuperCycle connects exclusively to Bluetooth Low Energy (BLE) devices. If a sensor only supports ANT+, it cannot connect to SuperCycle.
3. Wake up the sensor: Most sensors (speed, cadence, power) go to sleep to save battery when idle. Spin your pedals or wheels 3-4 times to wake them before scanning.
4. Smartwatches (e.g. Garmin watches): Ensure your watch is actively broadcasting heart rate over Bluetooth (e.g. on Garmin: Wrist Heart Rate → Broadcast Heart Rate).
5. Check for competing Bluetooth apps: Most BLE sensors only support 1 (or at most 2) active Bluetooth connections. If your sensor is connected over Bluetooth to Zwift, another cycling app, a smartwatch, or another phone, SuperCycle will be blocked from pairing. Disconnect or turn off Bluetooth on nearby devices. (Note: ANT+ broadcasts do not interfere with Bluetooth—your sensor can broadcast over ANT+ to a Garmin or Wahoo bike computer while simultaneously connecting to SuperCycle over Bluetooth).
6. Did you recently replace the battery? (Changed Sensor ID): When you replace the coin cell (CR2032) battery in some sensors, the sensor generates a new Bluetooth hardware address. SuperCycle will keep searching for the old address. Delete the sensor from your Sensor library, wake the sensor, and re-scan.
7. Did you restore a database across platforms (Android ↔ iOS)? Android uses hardware MAC addresses, while iOS generates private UUIDs. If you restored a backup from Android to iPhone (or vice versa), delete the sensors in your Sensor library and re-pair them.
8. Cold weather battery voltage drops: CR2032 coin cells suffer sharp voltage drops near 0°C (32°F), causing the sensor to lose connection or drop packets mid-ride even if the battery tests fine at room temperature.
9. The capacitor discharge reset: Some sensors require a hardware reset after a battery swap. Briefly insert the CR2032 battery upside down (reversed polarity) for 2 to 3 seconds to fully discharge internal capacitors, then flip it right-side up.
10. Reset phone Bluetooth: Toggle Bluetooth OFF in your phone settings, wait 10 seconds, then toggle it ON again.