Understanding how our node process takes readings

In order to integrate our sensor reading code into our server, first. let's understand what is happening under the hood whenever we execute the node script that takes our sensor readings. Let's review the snippet of code that actually called for the sensor readings:

    /*
    Section A
    */
    sensor.read(11, 4, function(err, temperature, humidity) {
        /*
        Section B
        */
        //After reading the sensor, we get the temperature 
    and humidity readings
        if (!err) {
            //If there is no error, log the readings to the 
    console
            console.log('temp: ' + temperature.toFixed(1) + 
    '°C, ' +
                'humidity: ' + humidity.toFixed(1) + '%'
    
            )
        }
    });
    /*
    Section C
    */

Immediately, we can see that the...