add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# Locally calculated
sha256 e8cfcf0817eb8430f736426bc7557273765cef0e8002a17cca51645114e723b7  tinymembench-v0.3.tar.gz