pxt-calliope/docs/reference/pins/digital-write-pin.md

Digital Write Pin

Write a digital (0 or 1) signal to a pin on the micro:bit board.

pins.digitalWritePin(DigitalPin.P1, 1)

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Some pins are also used by the LED screen. Please read the page about pins carefully.

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Parameters

• a string that stores the name of the pin (P0, P1, or P2, up through P20)
• a number that can be either 0 or 1

Example: football score keeper

This program reads pin P0 to find when a goal is scored. When P0 is 1, the program makes the score bigger and plays a buzzer sound through P2 with digital write pin.

let score = 0
basic.showNumber(score)
basic.forever(() => {
    if (pins.digitalReadPin(DigitalPin.P0) == 1) {
        score++;
        pins.digitalWritePin(DigitalPin.P2, 1)
        basic.showNumber(score)
        basic.pause(1000)
        pins.digitalWritePin(DigitalPin.P2, 0)
    }
})

This program is a remote control for the score keeper program. If you connect P1 on the remote control micro:bit to P0 on the score keeper micro:bit, you can press button B on the remote. This program will use digital write pin to make the other micro:bit buzz and make the score bigger.

input.onButtonPressed(Button.B, () => {
    pins.digitalWritePin(DigitalPin.P1, 1);
    basic.pause(500);
    pins.digitalWritePin(DigitalPin.P1, 0);
});

See also

micro:bit pins, digital read pin, analog read pin, analog write pin, on pin pressed