The troubleshooting trick I referred above is how to start the motor moving, IF you find the motor started trembling, got stuck, and could not move by hand. This is stepper motor newbie FAQ. The trick I use is to manually scan/sweep the PWM frequency, using the mks testing tool or xy-lpwm. It took me a couple of seconds to find that the initial freq setting of 5kHz is not appropriate for my motor and microstepping frequency resolution. I found a good frequency to start is around 3kHz.

I am thinking of also using another popular hobbyist toy stepper motor 28byj18 as an example.

Now the spec says no load start freq - 1900 pps/Hz, and Holding torque = 4k8 NM. And I should set motor current to 1.5A/phase.

@kyrpav I am testing 17H8401, 1.5A 480NM, max temp 80 deg. If your motor is 17H4401, then you should not set 1.5A, or torque not strong enough and motor too hot.

from the two pins that are uart int tcm2225 which one is tx which one is rx? and what is the vm pin

can you also tell me where to find all these blue breadboards and the distantiators that you have?