add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# From http://lists.gnu.org/archive/html/bug-ed/2017-02/msg00005.html
sha256    f57962ba930d70d02fc71d6be5c5f2346b16992a455ab9c43be7061dec9810db    ed-1.14.2.tar.lz