It's behaving as it should. The scrollphat.buffer_len() will remain the same until you call scrollphat.write_string() again. That's why we have the status_length variable that we decrement by 1 on each pass of the while loop, which makes sure we only scroll for the length of the tweet. Is my code above still not working for you? Are you doing this with a fresh install of the Scoll pHAT library? Can you post the whole script that you're using, so that I can check it, please?
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Twitter #hashtag to scroll pHAT
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