Rotary_Encoder

main.ts

let Min_X = 1;
let Max_X = 15;

let a = 0
let b = 0
let x = 5
let lastA = pins.digitalReadPin(DigitalPin.P5);
basic.forever(() => {
    a = pins.digitalReadPin(DigitalPin.P5);
    b = pins.digitalReadPin(DigitalPin.P11)
    if ((a != lastA) && (a == 0)) {
        // Knob Rotated l when aVal changes, BUT use only if aVal is LOW.
        if (b == 0) {
            x++;
        } else {
            x--;
        }
        x = Math.max(Min_X, Math.min(x, Max_X))
    }
    // keep x from 0 to 9
    lastA = a
})
basic.forever(() => {
    led.plotBarGraph(x, Max_X)
})

pxt.json

{
    "name": "Rotary_Encoder",
    "version": "0.0.0",
    "description": "Rotary Encoder Project",
    "license": "MIT",
    "dependencies": {
        "core": "*",
        "radio": "*"
    },
    "files": [
        "main.ts"
    ],
    "public": true,
    "publicGist": true
}