auto-calibration.js

/* This program uses a sensor that is automatically calibrated to measure moisture levels. It will ask for a 
measurement in air, then a measurement in water. It will repeat this process for a total  of three readings of air
and water each.It will then take the average of those readings and calibrate the sensor. It will display rows on the 
led matrix to show how much moisture it senses. */

let reading: number = 0;
let averageAir: number = 0;
let averageWater: number = 0;

class Moisture {
    
    constructor(){}; // default constructor
    calibrateAir() { //gets air reading
        basic.showArrow(4);//displays South symbol
        pins.digitalWritePin(DigitalPin.P12, 1);//powers sensor
        let air = pins.analogReadPin(AnalogPin.P0);//gets reading from sensor
        basic.pause(2000);
        pins.digitalWritePin(DigitalPin.P12, 0);//stops power to sensor
        return air;//returns reading
    }
    calibrateWater() {//gets water reading
        basic.showArrow(0);//displays North symbol
        pins.digitalWritePin(DigitalPin.P12, 1);//powers sensor
        let water = pins.analogReadPin(AnalogPin.P0);//gets reading from sensor
        basic.pause(2000);
        pins.digitalWritePin(DigitalPin.P12, 0);//stops power to sensor
        basic.clearScreen();
        basic.pause(2000);
        return water;//returns reading

    }
    getAverage() {//finds average of air and water readings
        let totalAir : number = 0;
        let totalWater : number = 0;
        totalAir = this.calibrateAir();//adds first air reading to air total
        totalWater = this.calibrateWater();//adds first water reading to water total 
        totalAir += this.calibrateAir();//adds second air reading to air total
        totalWater += this.calibrateWater();//adds second water reading to water total
        totalAir += this.calibrateAir();//adds third  air reading to  air total
        totalWater += this.calibrateWater();//adds third water reading to water total

        averageAir = totalAir / 3;//uses air total and divides by number of air readings
        averageWater = totalWater / 3;//uses water total and divides by number of water readings

    }
    getReading() {
        pins.digitalWritePin(DigitalPin.P12, 1);//powers sensor
        reading = pins.analogReadPin(AnalogPin.P0);//gets reading from sensor
        pins.digitalWritePin(DigitalPin.P12, 0);//stops power to sensor

        let i = pins.map(reading, averageAir, averageWater, 0, 4);//maps reading in a 0-4 range
        this.ledRow(i);// calls ledRow 
        this.fillRows(i);//calls fillRows
    }
    ledRow(r: number): void {//lights up the led row that corresponds with the reading
        led.plot(0, 4 - r);
        led.plot(1, 4 - r);
        led.plot(2, 4 - r);
        led.plot(3, 4 - r);
        led.plot(4, 4 - r);
    }
    fillRows(r: number): void {//lights up all led rows under the led row that corresponds with the reading
        for (let i = r; i >= 0; i--) {
            this.ledRow(i);
        }
    }
}


let test = new Moisture(); //instanciates Moisture class
test.getAverage();//calls get average
basic.showString("Calibration success");//sends success message
basic.forever(function () {//starts a continual loop after calibration is complete
    test.getReading();//calls get reading
    basic.pause(1000);
    basic.clearScreen();//clears led matrix
    basic.pause(100);
})