A: This is because the recording function of the device is not triggered. Did you delete the device from the home page and then add the device again?
There is a delete button on the home page, you can delete it and try again.
That’s because the phone corrects the data at the same time as it reads it, and if it corrects the error, the reading will fail.
If the reading fails, go back to the home page and type again to see if it is back to normal, and turn off the sensor while loading the data.