Power manager
powerSourceMinVoltage
Set minimum voltage required for VIN to be used. This applies only when powered through VIN. The value is in millivolts or 1000ths of a volt, so 3880 is 3.880 volts.
The default is 3880 (3.88 volts).
// PROTOTYPES
SystemPowerConfiguration& powerSourceMinVoltage(uint16_t voltage)
uint16_t powerSourceMinVoltage()