#include <LiquidCrystal.h> // include standard LCD library

LiquidCrystal lcd(5,18,19,21,22,23); // assign pins as RS, E, D4, D5, D6, D7

// Potentiometers are connected to GPIO 34 and 35
const int potPin1 = 34;
const int potPin2 = 35;

// Declare integers for potentiometer value
int pot1Value = 0;
int pot2Value = 0;

// Declare floats for potentiometer voltage
float pot1Voltage = 0.00;
float pot2Voltage = 0.00;

void setup() {
Serial.begin(115200);
lcd.begin(16,2);
delay(100);
// pinMode(potPin1,INPUT_PULLUP);
}

void loop() {
// Measures the value of the potentiometer
pot1Value = analogRead(potPin1);
pot1Voltage = 3.3 * analogRead(potPin1)/4095;

pot2Value = analogRead(potPin2);
pot2Voltage = 3.3 * pot2Value/4095;

Serial.println((String)pot1Value + " " + (String)pot2Value);
Serial.println((String)pot1Voltage + "V, " + (String)pot2Voltage + "V");

lcd.clear();
lcd.setCursor(0,0);
lcd.println((String)pot1Value + " " + (String)pot2Value);
lcd.setCursor(0,1);
lcd.println((String)pot1Voltage + "V " + (String)pot2Voltage + "V");

delay(500);
}

/*
void setup() {
  
  Serial.begin(115200);
  analogSetAttenuation(ADC_0db);
  Serial.println("Hello, ESP32!");

  lcd.begin(16,2); // specify 16-column 2-row LCD
  //lcd.backlight(); // no function for most LCDs
  lcd.setCursor(1, 0);
  lcd.print("Hello, Wokwi!");
  delay(1000);
}

void loop()
{
  lcd.clear();
  ADCvalue = analogRead(ADCpin);
  Serial.print("ADC Value: ");
  Serial.println(ADCvalue);

  ADCvoltage = (ADCvalue * 3.3) / 4095;
  actual_voltage = ADCvoltage * 6;

  lcd.setCursor(0,0);      // set cursor to first column, first row
  lcd.print("ADC Value:"); // print message
  lcd.setCursor(11,0); // set cursor to 12th column, first row
  lcd.print(ADCvalue);

  lcd.setCursor(0,1);
  lcd.print("Voltage: ");
  lcd.print(actual_voltage);
  lcd.print("V");
  delay(500);
  lcd.clear();
  delay(10); // this speeds up the simulation
}

 /*
    int analogvalue = analogRead(A0);
    temp = (analogvalue * 5.0) / 1024.0; // FORMULA USED TO CONVERT THE VOLTAGE
    input_volt = temp / (r2/(r1+r2));

if (input_volt < 0.1) 
   {
     input_volt=0.0;
   } 
    Serial.print("v= "); // prints the voltage value in the serial monitor
    Serial.println(input_volt);

    lcd.setCursor(0, 1);
    lcd.print("Voltage: "); // prints the voltage value in the LCD display  
    lcd.print(input_volt);
    delay(300);
    */