add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# locally computed
sha256  6fb92f6f5925e0af918ffbb90acf19b7b88706ebcd40fc186b7caa76609b6350  yaml-cpp-0.5.2.tar.gz