1. A method for detecting stalling of an electric stepper motor, comprising:continuously or periodically obtaining a plurality of samples of a voltage at a coil of the stepper motor;
determining a deviation value corresponding to a deviation between measured voltages of two of the plurality of obtained samples; and
determining, using the deviation value whether the electric motor is stalling,
each sample of the plurality of samples is an individual raw voltage value obtained from the coil of the stepper motor at a predefined time, and
a start sample of the plurality of samples is a sample obtained after a start of a control phase and after a predetermined time interval has lapsed.