/*
 In the browser window, copy and paste this file into an arduino sketchbook. Then save this file as a file named "acquire_temperatures".
 This sketch, or computer program, allows us to collect temperature data and write the data to a monitor.
 Lines like this one (grayed out), are comments to help explain the code.
 Other explanatory comments are shown to the right of the // symbols in the code below.
*/

/*-----( First, we load necessary software libraries. Libraries are code written by someone else, but that you can and should use. )-----*/

#include <SPI.h>                 // serial peripheral interface (SPI) is a data protocol used by microcontrollers to control peripherals.
#include <DallasTemperature.h>   // this library includes software for the temperature sensor used in this exercise.
#include <OneWire.h>             // this library includes software that allows communication and power for one or more devices with a single wire.
#include <Wire.h>                // this library includes software that allows communication with two-wire interface devices

/*-----( Next, we tell the software where to find the temperature sensor--connected to Pin 2, which is where we connected it. )-----*/

#define ONE_WIRE_BUS 2 

/*-----( Declare two "objects" to communicate with devices; ourWire and sensors)-----*/
/*-----(  The result is to set up a way to communicate with the temperature sensor  )-----*/
                                                                                             
OneWire ourWire(ONE_WIRE_BUS); // allows the object ourWire to communicate with thermistor                                                                                             
DallasTemperature sensors(&ourWire); // tells the object "sensors" to handle temperature sensor //

/*-----( Perform tasks that only need to be done once. This is a typical requirement of all ARDUINO code.)-----*/
/*-----( Here we define a function called "setup". The function opens serial communications and waits for communications port to open. )-----*/

void setup() //"Void" is a special keyword associated with functions that have no output, like this one.
    {        //Curly brackets are part of the required syntax for the ARDUINO language.

    Wire.begin(); 
    Serial.begin(9600);
 
          {
            // wait for serial port to connect. Needed for native USB port only.
         }
   
      }   // end of setup. 
      
  /*-----( Perform tasks that will be repeated. Another typical requirement of sketches used with ARDUINO )-----*/
  /*-----( Here we define a function to acquire data from our sensor every 1000 milliseconds )----------------- */
   
    void loop() //Defines a function called loop that will acquire temperatures repeatedly every second
          {   
         sensors.begin();
         sensors.requestTemperatures(); // Send the command to get temperatures. Commands like requestTemperatures are from the libraries mentioned above.
         Serial.print(sensors.getTempCByIndex(0)); //Prints temperatures in degrees C in order ("by index") according to time to your serial monitor (computer screen).
         Serial.print("C"); //Prints the literal letter "C", for degrees Celsius.
         Serial.print("    "); //Prints a space; for readability.
         Serial.print(sensors.getTempFByIndex(0)); //Prints temperatures in degrees F in order ("by index") according to time.
         Serial.println("F"); //Prints the literal letter "F", for degrees Fahrenheit and provides a new line.
         delay(5000);        //Delay is the number of milliseconds between temperature samples
 }
 
/*-------(  The loop will keep running until you turn off the power to the ARDUINO )----------*/