TriSens

main.js

console.log("TriSens");

var mraa = require('mraa');
console.log('MRAA Version: ' + mraa.getVersion());

var tempPin = new mraa.Aio(0);
var lightPin = new mraa.Aio(1);
var soundPin = new mraa.Aio(2);


var B = 3975; // B value of the thermistor
function toCelsius(v) {
    var resistance = (1023 - v) * 10000 / v;
    var celsius_temperature = 1 / (Math.log(resistance / 10000) / B + 1 / 298.15) - 273.15;
    return celsius_temperature;
}

setInterval(function () {
    var time = new Date();
    console.log("==== " + time + " ====");
    var tempValue = tempPin.read();
    var lightValue = lightPin.read();
    var soundValue = soundPin.read();
    
    console.log("tempPin Value: " + toCelsius(tempValue));
    console.log("lightPin Value: " + lightValue);
    console.log("soundPin Value: " + soundValue);
}, 5000);