poll rate example

Would someone please write an example that changes the poll rate to a higher speed? I'm having trouble making it work. The only thing that has worked for me is to change the default in my local copy of cedargrove_nau7802.py.
Thanks!

Start by reading cedargrove_nau7802.py to find how the poll rate is configured, then inspect the repository for existing examples. Done means an example clearly demonstrates setting a higher poll rate without changing the library's default; no specific test is mentioned in the issue.

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