add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# locally computed
sha256  092c26c51166d1d1f025cd06742981783dea7e42bfe4f73f10c4418fc003de94  ympd-v1.2.3.tar.gz