add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# md5 from https://pypi.python.org/pypi/backports_abc/json, sha256 locally computed
md5 7d1936ec183a3586290adf60f6f96764 backports_abc-0.5.tar.gz
sha256 033be54514a03e255df75c5aee8f9e672f663f93abb723444caec8fe43437bde backports_abc-0.5.tar.gz