A stepper motor or step motor or stepping motor is a brushless DC electric motor that divides a full rotation into a number of equal steps. The motor's position can then be commanded to move and hold at one of these steps without any position sensor for feedback (an open-loop controller), as long as the motor is carefully. 7 Feb Step motors can be driven in several modes: full-step, half-step, or micro-step ( quarter and eighth stepping are common). Full-step operation can be achieved by one-phase-on excitation at a time at the rated current. Maximum torque is achieved in the full-step mode with both phases fully energized at the. I have a stepper and a Wemos D1. However, there is something wrong with the Wemos as I can not use libaries with the stepper. I found a code that work. However, it is for full step but I want to use half step, and my programming skills are not sufficient to understand the code. Is there some one how.