Use pins that support digitalRead() and digitalWrite() reliably (most GPIOs). Avoid pins already used for: Hardware serial (e.g. 0, 1 on some boards), unless you know the tradeoffs. Critical timing or ...

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Odyssey Grow Arduino Grow! Get ready to learn about digitalizing agriculture by creating a fully automatic watering system to grow a plant! See how you can make a change as it grows throughout the ...