add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# sha256 locally computed
sha256 2a2f5c2a214a9980c086ac7561a5dd106f13d823a630de218eabafe1d995c5b4  mono-5.4.0.201.tar.bz2