add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# md5 from https://pypi.python.org/pypi/chardet/json, sha256 locally computed
md5    7dd1ba7f9c77e32351b0a0cfacf4055c  chardet-3.0.4.tar.gz
sha256    84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae  chardet-3.0.4.tar.gz