add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# locally computed
sha256  2d496828a085ada8ff139da9306bd2b8cb987798fee93caf0089dc399195e238  libphidget_2.1.8.20140319.tar.gz