using johnny five to control an arduino-based UV sensor

// --------------------------------------------------------------------------
// -- uv-sensor.js
// --------------------------------------------------------------------------

var five = require("johnny-five");
var board = new five.Board();

let uvReading = 0;
let uvVoltage = 0;

board.on("ready", function() {
    let uvSensor = new five.Sensor({
          pin: "A0",
          freq: 500
      });
    uvSensor.on("data", function () {
        uvReading = this.value;
        uvVoltage = this.value/1024*5.0;
        console.log("sensor value: " + uvReading, "; sensor voltage: " + uvVoltage + "V");
    })
});