Measure and display temperature with a BBC Micobit computer

program.js

// The number of leds represent how many
// degrees Celsius are above 15C
// run and compile at https://pxt.microbit.org

const getLedArray = (temp: number) => {
    const n = Math.max(0, temp - 15);

    return[
        Math.min(5, n),
        Math.max(0, Math.min(5, n - 5)),
        Math.max(0, Math.min(5, n - 10)),
        Math.max(0, Math.min(5, n - 15)),
    ];
};

const drawArray = (vals: Array < number >) => {
    vals.map((value: number, y: number) => {
        for (let x = 0; x < value; x++) {
            led.plot(x, y);
        }
    });
}
let canDisplay = true;

basic.forever(() => {
    if (canDisplay) {
        basic.clearScreen()
        drawArray(getLedArray(input.temperature()));
        basic.pause(1000);
        led.toggle(4, 4);
    }
    basic.pause(1000);
})

input.onButtonPressed(Button.A, () => {
    canDisplay = false;
    basic.showString(`${ input.temperature() } C`);
    canDisplay = true;
})

bluetooth.startTemperatureService();