add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# Locally computed:
sha256  bf9a17673adffcc28ff7ea18764f06136547e97bbd9edf2ec612f09b207f0659  espeak-1.48.04-source.zip