read.js

var solar = require("easybotics-ina219");

solar.init();

solar.calibrate32V1A(function () {
    solar.getBusVoltage_V(function (volts) {
        // console.log("Voltage: " + volts);
        solar.getCurrent_mA(function (current) {
            // console.log("Current (mA): " + current + "\n\n");
        });
    });
});

function readFromSolar() {
    var reading = {
        voltage1: 0,
        current1: 0,
        power1: 0,
    };

    solar.getBusVoltage_V(function (volts) {
        // console.log("Voltage: " + volts);
        solar.getCurrent_mA(function (current) {
            // console.log("Current (mA): " + current + "\n\n");
            reading.voltage1 = roundOff(volts);
            reading.current1 = 200;
            reading.power1 = roundOff((volts * reading.current1) / 1000);
        });
    });
    return reading;
}

function readFromMains() {
    var reading = {
        voltage2: 0,
        current2: 0,
        power2: 0,
    };
    // make mains power constant
    reading.power2 = 2;
    return reading;
}
function roundOff(numero) {
    return Math.round(numero * 100) / 100;
}

function read() {
    var mains = readFromMains();
    var green = readFromSolar();
    return (results = {
        ...mains,
        ...green,
        price: roundOff(calculatePrice(green.power1, mains.power2)),
    });
}
// price calculation is dynamic and depends on the amount of power from green energy sources
// and the amount of power from fossil souces
function calculatePrice(greenPower, fossilpower) {
    var ceilingPrice = 26;
    var minPrice = 5;
    var totalpower = greenPower + fossilpower;
    var diff = ceilingPrice - minPrice;
    var deduction = (greenPower / totalpower) * diff;
    return ceilingPrice - deduction;
}
// export our functions to be consumed by the module that uploads the
// data to azure IOT
module.exports = {
    readFromMains,
    readFromSolar,
    read,
};