add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# Locally computed:
sha256  16cdaeb62eb3e6dfab2435f7d7bccd2f37438d21c5218ec4e58efa9157d4d41a  libexif-0.6.21.tar.bz2