Tom's Life Bits

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Arduino code:

pinMode(GPIO, OUTPUT);
digitalWrite(GPIO, STATE);

pinMode(GPIO, INPUT);
digitalRead(GPIO);

The following modes are supported for the basic input and output:

• INPUT sets the GPIO as input without pullup or pulldown (high impedance).
• OUTPUT sets the GPIO as output/read mode.
• INPUT_PULLDOWN sets the GPIO as input with the internal pulldown.
• INPUT_PULLUP sets the GPIO as input with the internal pullup.