/*

  Analog input, analog output, serial output

 Reads an analog input pin, maps the result to a range from 0 to 255

 and uses the result to set the pulsewidth modulation (PWM) of an output pin.

 Also prints the results to the serial monitor.

 The circuit:

 * potentiometer connected to analog pin 0.

   Center pin of the potentiometer goes to the analog pin.

   side pins of the potentiometer go to +5V and ground

 * LED connected from digital pin 9 to ground

 created 29 Dec. 2008

 modified 9 Apr 2012

 by Tom Igoe

 This example code is in the public domain.

 */

#include <SoftwareSerial.h>

SoftwareSerial mySerial(255, 2);

// These constants won't change.  They're used to give names

// to the pins used:

const int analogInPin = A2;  // Analog input pin that the potentiometer is attached to

const int analogOutPin = 3; // Analog output pin that the LED is attached to

int sensorValue = 0;        // value read from the pot

int outputValue = 0;        // value output to the PWM (analog out)

void setup() {

  // initialize serial communications at 9600 bps:

  mySerial.begin(9600); 

  pinMode(analogOutPin, OUTPUT);

  digitalWrite(analogOutPin, LOW);           

}

void loop() {

  // read the analog in value:

  sensorValue = analogRead(analogInPin);            

  // map it to the range of the analog out:

  outputValue = map(sensorValue, 0, 1023, 0, 255);  

  // change the analog out value:

  // print the results to the serial monitor:

  mySerial.print("sensor = " );                       

  mySerial.print(sensorValue);      

  mySerial.print("\t output = ");      

  mySerial.println(outputValue);   

  // wait 2 milliseconds before the next loop

  // for the analog-to-digital converter to settle

  // after the last reading:

  delay(200);                     

}