/*
  ReadAnalogVoltage

  Reads an analog input on pin 0, converts it to voltage, and prints the result to the Serial Monitor.
  Graphical representation is available using Serial Plotter (Tools > Serial Plotter menu).
  Attach the center pin of a potentiometer to pin A0, and the outside pins to +5V and ground.

  This example code is in the public domain.

  https://www.arduino.cc/en/Tutorial/BuiltInExamples/ReadAnalogVoltage
*/

#include <SoftwareSerial.h>
SoftwareSerial SoftSerial(5, 4);

// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:
  SoftSerial.begin(9600);
  SoftSerial.println("connected"); 
  //pinMode(0, OUTPUT);
  pinMode(3, INPUT); //Photosensor 
  pinMode(4, OUTPUT); //TX
  pinMode(5, INPUT); //RX
}

// the loop routine runs over and over again forever:
void loop() {

/*
  digitalWrite(0, HIGH);
  delay(500);  
  digitalWrite(0, LOW); 
  delay(500);  
*/

  // read the input on analog pin 3:
  int sensorValue = analogRead(3);
  // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
  float voltage = sensorValue * (5.0 / 1023.0);
  // print out the value you read:
  SoftSerial.println(voltage);
  delay(500);
}