add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# Locally computed:
sha256    ccf6d8fbae03fb2e0ba32878ed8e57d8b4f73538b1064df90a3e764da5fac010    tinydtls-0.8.2.tar.gz
sha256    65fbf31c3551633e7dcc051fac80f2c1a73b0b077af9ed564d726155dfc40513    tinydtls.h