pxt-calliope/docs/projects/analog-pin-tester.md

Analog Pin Tester

Use this program to graph the analog values that are read from pin P0. Press A to scroll the value on the screen.

let reading = 0
basic.forever(() => {
    reading = pins.analogReadPin(AnalogPin.P0)
    led.plotBarGraph(
        reading,
        1023
    )
    if (input.buttonIsPressed(Button.A)) {
        basic.showNumber(reading)
    }
})