xDrip » FAQ » Encircled P in front of the reading
An encircled P is shown in front of the blood glucose reading on the main screen if the following two conditions are satisfied.
1- A plugin is used. This is enabled at Settings −> Less common settings −> Advanced Calibration −> Use Plugin Glucose.
2- The Calibration plugin is not null. This is done by choosing anything other than None at Settings −> Less common settings −> Advanced Calibration −> Calibration Plugin.
