#include <LiquidCrystal_I2C.h>     // if you don´t have I2C version of the display, use LiquidCrystal.h library instead

LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars and 2 line display

int tempo; //to store the millis() function
int rd_tm = 500; //[ms] to set time of reading
int lettura[] = {0 , 0}; // variable to read the first sensor
float volt = 0;
float pressure = 0;
int i = 0;

//support variable 
bool debug = 0; //For print more info in the serial port
bool display = 1; //To print on diplay

void setup() {

  Serial.begin(115200);
  Serial.print("--Setup--");
  pinMode(A0,INPUT);

  //Set up
  Serial.print("\n\n--interface printing--");
  Serial.print("\n\n----------TRASDUINO-----------");

}

//this function convert the value readed by the analog port to the corrispondent voltage value 
float readToVolt(int read, float scale)
{
  if(debug)
  {
    Serial.print("|   |scale -> ");
    Serial.print(scale);
  }
  float volt = read*scale;
  Serial.print("|   |Volt -> ");
  Serial.print(volt);
  return volt;
}

//this function convert the Voltage value in Bar (linear correlation)
float VoltToBar(int volt)
{
  float Bar = volt*35 -32.97; //empirical relation for the sensor
  Serial.print("|   |Bar -> ");
  Serial.print(Bar);
  return Bar;
}

void loop() 
{
  //start
  tempo = millis();
  lettura[0] = analogRead(A0); // if you want to conect the sensor to other port use this variable
  lettura[1] = analogRead(A1); // if you want to conect the sensor to other port use this variable

  i = 0;
  
  while( i < 2)
  {  
    Serial.print("\n Sensor(");
    Serial.print(i+1);
    Serial.print(") :");
    if (debug)
    {
      Serial.print("\n\n time ->");
      Serial.print(tempo);
      
      Serial.print("|   |read ->");
      Serial.print(lettura[i]); 
    }
    else
    {
      Serial.print("\n\n");
    }
     i ++; 
    }
  delay(rd_tm);
}