Adding a Button to a Raspberry Pi Pico (CircuitPython School)

In this lesson we use CircuitPython to read a button wired to a Raspberry Pi Pico or Pico W. We'll also learn about different types of buttons, how code for external buttons differs from the built-in button on the CircuitPlayground boards, and we'll see why a Pull.UP resistor is necessary as we observe floating or high impedance state.
We'll also show how the Pico 2 might not show high impedance state, but STILL NEEDS the internal Pull.UP resistor.
or just the pico lessons in:
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