add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# Locally computed:
sha256  30719c9a4ffbcf15676b8f528233ccc54ee6cba96cb4590975f5fd60c68a066f  netcat-0.7.1.tar.gz