Spent days trying to get this thing to respond. Libraries loaded, pi boot reconfigured. Just blocks the engine and sits there. The instructions are partly in English, which in itself is a bit of a mystery. Tried both connections on two different stepper motors. Also set all switches to 0 and back to "1". I've never had a completely useless Pi product, so I kept trying. It's only $21, so not a big loss. If you try, good luck!
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