#include

int Read_Voltage = A1;
int Read_Current = A0;
const int rs = 2, en = 4, d4 = 9, d5 = 10, d6 = 11, d7 = 12;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
float Voltage = 0.0;
float Current = 0.0;
float Power = 0.0;
void setup()
{
lcd.begin(16, 2);
Serial.begin(9600);

lcd.print(" Arduino ");
lcd.setCursor(0, 1);
lcd.print(" Wattmeter ");

delay(2000);
lcd.clear();

}

void loop()
{

Voltage = analogRead(Read_Voltage);
Current = analogRead(Read_Current);

Voltage = Voltage * (5.0/1023.0) * 6.46;
Current = Current * (5.0/1023.0) * 0.239;

Serial.println(Voltage);
Serial.println(Current);

Power = Voltage * Current;

Serial.println(Power);

lcd.setCursor(0, 0);
lcd.print("V="); lcd.print(Voltage);
lcd.print(" ");
lcd.print("I=");lcd.print(Current);
lcd.setCursor(0, 1);
lcd.print("P="); lcd.print(Power);
delay(1000);
}