(Sorry, just saw your comment) Cool! Could you possibly post some pictures of it? I was wanting to try the same thing.
Where is that error coming from?
You could try adjusting the Google cardboard viewer, mine didn't work the first few tries either. Hope you get it working!
I am not quite sure how I would do that, it is a good idea though.
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Would it be okay if I used the code for this as a step tracker in a smart watch instructable I am making? I would give the original link and credit to you.
Great idea! Have you been able to print anything with it?
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