add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# Locally computed:
sha256    ccc971298db70963d3f13766c3246a3c36ae7e388acfab7ba2180149d9c8c64f  mongoose-6.7.tar.gz