The plain-English version
General-purpose input/output pins that software configures to read or drive digital signals.
Why it matters
Pin modes and electrical characteristics are part of the program's operating contract.
Let’s make it click
A test program reads a button state and updates an indicator.
Vibe Bro’s heads-up
A pin's logical value does not make every external connection electrically compatible; use the specific board's documented limits and suitable circuitry.
The docs behind it
Documentation links checked .
Editorial review · October 28, 2026
Supported: GPIO function and electrical-compatibility caveats are correct; logic level is not permission to connect arbitrary circuitry.