add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# Locally computed
sha256  c8c862b0e9a7ba699a49bc98f62bdffdfafd53a5716c0e162696b4bf108d3637  libmodbus-3.1.4.tar.gz