1. Bluetooth connection timeout.
Reason:S9 wasn't turned on. Reason:S9 was connected by other person. Reason: S9 in low battery. Reason: Phone location access is denied. Reason: S9 hardware error.2. No data received.
Reason:User hasn't measured for a long time. Reason:S9 hardware error.3. Receive weight with no fat or heartbeat.
Reason: Shoes were not taken off during the measurement.(Including user's feet is dirty, or user doesn't stand on metal plates.) Reason: User didn't wait util fat measurement was completed. Reason:Minors are not currently supporting body fat testing. Reason:S9 hardware error.4. Receive weight and fat with no heartbeat.
Reason:User didn't wait util heartbeat measurement was completed. Reason:Heartbeat switch is closed. Reason: S9 hardware error.5.Received weight and heartbeat except fat.
Reason:Mobile phone network anomaly. Reason:Minors are not currently supporting body fat testing. Reason: S9 hardware error.