pxt-calliope/docs/projects/compass.md

Use the compass to determine which direction you are heading.

Step 1

Continuously sample the compass heading and store in the variable degrees:

let degrees = 0;
basic.forever(() => {
    degrees = input.compassHeading();
});

Step 2

If the degrees is less than 45, we are heading North:

let degrees = 0;
basic.forever(() => {
    degrees = input.compassHeading();
    if (degrees <= 45) {
        basic.showString("N");
    } else if (false) { } else { }
});

Step 3

Otherwise, if the degrees is less than 135, we are heading East:

let degrees = 0;
basic.forever(() => {
    degrees = input.compassHeading();
    if (degrees <= 45) {
        basic.showString("N");
    } else if (degrees <= 135) {
        basic.showString("E");
    } else { }
});

Step 4

Otherwise, if the degrees is less than 225, we are heading East:

let degrees = 0;
basic.forever(() => {
    degrees = input.compassHeading();
    if (degrees <= 45) {
        basic.showString("N");
    } else if (degrees <= 135) {
        basic.showString("E");
    } else if (degrees <= 225) {
        basic.showString("S");
    } else {
    }
});

Step 5

Otherwise, we are heading west.

let degrees = 0;
basic.forever(() => {
    degrees = input.compassHeading();
    if (degrees <= 45) {
        basic.showString("N");
    } else if (degrees <= 135) {
        basic.showString("E");
    } else if (degrees <= 225) {
        basic.showString("S");
    } else {
        basic.showString("W");
    }
});