add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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BEGIN:VCARD
VERSION:3.0
N:Smith;Kelvin
FN:Kelvin Smith
TEL;WORK;VOICE:(858) 592-1223
ROLE:Programmer
NICKNAME:Kel
CHARSET:abby
END:VCARD