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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@fobus
it is juddering, it only goes to forward never comes back. I think orders are correct.
I can see all leds are blinking one by one, in sequence. I think this means that stepper motor wired up correctly.
It doesn't plugged to a gear, it is working freely.