add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# md5 from https://pypi.python.org/pypi/asn1crypto/json, sha256 locally computed
md5    74a8b9402625b38ef19cf3fa69ef8470  asn1crypto-0.22.0.tar.gz
sha256    cbbadd640d3165ab24b06ef25d1dca09a3441611ac15f6a6b452474fdf0aed1a  asn1crypto-0.22.0.tar.gz