Your picture does not show any power connections to the board to run the NodeMCU and the stepper motor. If your using the USB on the NodeMCU to power the system then you probably wont have enough power and risk damaging your NodeMCU.
Your picture does not show any power connections to the board to run the NodeMCU and the stepper motor. If your using the USB on the NodeMCU to power the system then you probably wont have enough power and risk damaging your NodeMCU.