I’m trying to connect to my Xiaomi Band 8 and read heart rate data using gatttool. I followed steps from similar articles for heart rate monitors like Polar Beat. While I can connect to the device and write to the Client Characteristic Configuration Descriptor (CCCD) to enable notifications for the Heart Rate Measurement characteristic, I do not receive any notifications. Despite ensuring that the fitness tracker is active and properly worn and also refreshing the heart rate manually, no heart rate data is being received from the output..