#include <LiquidCrystal.h> 


LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

const float referenceVolts = 5;        // the default reference on a 5-volt board
//const float referenceVolts = 3.3;  // use this for a 3.3-volt board

const float R1 = 10000; // value for a maximum voltage of 10 volts
const float R2 = 10000;
// determine by voltage divider resistors, see text
const float resistorFactor = 1023.0 / (R2/(R1 + R2));  
const int batteryPin = 0;         // +V from battery is connected to analog pin 0

int sensorPin3 = A3;    // select the input pin for the potentiometer

int sensorValue0 = 0;  // variable to store the value coming from the sensor
int sensorValue3 = 0;  // variable to store the value coming from the sensor


void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
  lcd.begin(20,4);              // columns, rows.  use 16,2 for a 16x2 LCD, etc.
  lcd.clear();                  // start with a blank screen
}

void loop() {
  
   int val = analogRead(batteryPin);  // read the value from the sensor
   float volts = (val / resistorFactor) * referenceVolts ; // calculate the ratio
   Serial.print("Volts :"); 
   Serial.println(volts);  // print the value in volts
   
 float average = 0;
  for(int i = 0; i < 1000; i++) {
    average = average + (.0264 * analogRead(A3) -13.51) / 1000;
    delay(1);   
 }
  Serial.print("Amps :"); 
  Serial.println(average);  
  
  lcd.setCursor(0,0);           // set cursor to column 0, row 0 (the first row)
  lcd.print("Volts:");    // change this text to whatever you like. keep it clean.
  lcd.setCursor(0,1);           // set cursor to column 0, row 1
  lcd.print(volts);
  
  // if you have a 4 row LCD, uncomment these lines to write to the bottom rows
  // and change the lcd.begin() statement above.
  lcd.setCursor(0,2);         // set cursor to column 0, row 2
  lcd.print("Amps");
  lcd.setCursor(0,3);         // set cursor to column 0, row 3
  lcd.print(average);
  
}