/*Potentsiometer with 3 leds */
const int RP_pin = 12;     
const int LED1 =  17;      
const int LED2 =  4;
const int LED3 =  2;
int RP_val;
//#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);  // set the LCD address to 0x3f for a 16 chars and 2 line display

//float potnvolt;
void setup()
{
  lcd.init();
  lcd.backlight();
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(RP_pin, INPUT);
  digitalWrite(LED1, LOW);
  digitalWrite(LED2, LOW);
  digitalWrite(LED3, LOW);
  Serial.begin(9600);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Pot with 3 leds");
  delay(5000);
  lcd.clear();
  analogReadResolution(10);   
}

void loop()
{ 
  RP_val = analogRead(RP_pin);
  //potnvolt=(float)(digitpotnval*5.0)/1023;
  Serial.print(RP_val);
  Serial.print("\n");
  //Serial.println(digt_poten_val);
  lcd.setCursor(0, 1);
  lcd.print("RP_val=");
  lcd.setCursor(7, 1);
  lcd.print(RP_val);
  delay(1000);
  lcd.clear();
  if (RP_val <=250)
  {
  digitalWrite(LED1, LOW);
  digitalWrite(LED2, LOW);
  digitalWrite(LED3, LOW); 
  }
  else if ((RP_val>255)&&(RP_val <=510))  
  {
  digitalWrite(LED1, HIGH);
  digitalWrite(LED2, LOW);
  digitalWrite(LED3, LOW);
  }
  else if ((RP_val>510)&&(RP_val <=765))  
  {
  
  digitalWrite(LED1, HIGH);
  digitalWrite(LED2, HIGH);
  digitalWrite(LED3, LOW);
  }
  else if (RP_val>765)
  {
  digitalWrite(LED1, HIGH);
  digitalWrite(LED2, HIGH);
  digitalWrite(LED3, HIGH);
  }
}