Arduino Code

/*
** Example Arduino sketch for SainSmart I2C LCD2004 adapter for HD44780 LCD screens
 ** Readily found on eBay or http://www.sainsmart.com/ 
 ** The LCD2004 module appears to be identical to one marketed by YwRobot
 **
 ** Address pins 0,1 & 2 are all permenantly tied high so the address is fixed at 0x27
 **
 ** Written for and tested with Arduino 1.0
 ** This example uses F Malpartida's NewLiquidCrystal library. Obtain from:
 ** https://bitbucket.org/fmalpartida/new-liquidcrystal 
 **
 ** Edward Comer
 ** LICENSE: GNU General Public License, version 3 (GPL-3.0)
 **
 ** NOTE: TEsted on Arduino NANO whose I2C pins are A4==SDA, A5==SCL
 */
#include <Wire.h>
#include <LCD.h>
#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x3F  // Define I2C Address where the PCF8574A is
#define BACKLIGHT_PIN     3
#define En_pin  2
#define Rw_pin  1
#define Rs_pin  0
#define D4_pin  4
#define D5_pin  5
#define D6_pin  6
#define D7_pin  7

int n = 1;
int threshold0=200;
int threshold1=400;
int ledPin =  13; 
int ledState= HIGH;    
LiquidCrystal_I2C lcd(I2C_ADDR,En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6_pin,D7_pin);

void setup()
{
  Serial.begin(9600);
   
  lcd.begin (20,4);
 pinMode(ledPin, OUTPUT);
  // Switch on the backlight
  lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE);
  lcd.setBacklight(10 ); lcd.home ();                   // go home

  lcd.write(Serial.read());  
  
   
lcd.setCursor(0,0);
   lcd.println("SPHS Engineering/Hort");
    //lcd.scrollDisplayLeft();
  lcd.setCursor ( 0, 1 );        // go to the 2nd line
    lcd.print("Test BY: MATT/TYLER");
  lcd.setCursor ( 0, 2 );        // go to the third line
  lcd.print("Moisture Sensor");
  lcd.setCursor ( 0, 3 );        // go to the fourth line
  lcd.print("Soil Cond.:");
}
void loop() {

   lcd.setCursor (11,3); 
  int range = map(analogRead(0), threshold0, threshold1, 0, 2);
switch (range) {
  case 0:    // your hand is on the sensor
   lcd.print("PERM.WILT");   digitalWrite(ledPin, HIGH);

    break;
  case 1:    // your hand is close to the sensor
    lcd.print("FIELD CAP.");    digitalWrite(ledPin, LOW);

    break;
  case 2:    // your hand is a few inches from the sensor
   lcd.print("SATURATED ");    digitalWrite(ledPin, LOW);

    break;
    //digitalWrite(ledPin, HIGH);

  } //  if (ledState == LOW)
     //analogRead 
    
   // else
    //  ledState = LOW;

    // set the LED with the ledState of the variable:
    
  delay(50);        // delay in between reads for stability
}  
// constants won't change. Used here to 
// set pin numbers:
    // the number of the LED pin

// Variables will change:
         // ledState used to set the LED

// the follow variables is a long because the time, measured in miliseconds,
// will quickly become a bigger number than can be stored in an int.

  // set the digital pin as output:
  
//void loop()




  

/* if (analogRead(0)>threshold0)
{lcd.print("dry");
}
  else if(threshold0<analogRead(0)<threshold1);
  {lcd.print("moist");}
  else else if(analogRead(0)>threshold1);
  {lcd.print("soaked");}
}

*/
 

 
 // Backlight on/off every 3 seconds
/* lcd.setCursor (14,3);        // go col 14 of line 3
 
  lcd.print(analogRead(0)>200);
lcd.print(analogRead(0)<400);}*/
  
 
  
 


    // when characters arrive over the serial port...
  //if (Serial.available()) 
    // wait a bit for the entire message to arrive
   // delay(100);
    // clear the screen
    //lcd.clear();
    // read all the available characters
    //while (Serial.available() > 0) 
      
 // Serial.print();
// Serial.print(analogRead(0));