/**
   Arduino Electronic Safe

   Copyright (C) 2020, Uri Shaked.
   Released under the MIT License.
*/
#include <math.h>
#include <LiquidCrystal.h>
/* Display */
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
float randomNum;

void setup() {
 randomSeed(analogRead(0));
  lcd.begin(20, 4);
 lcd.setCursor(5, 0);
  lcd.print("PZEM-004T");
  lcd.setCursor(2, 1);
  lcd.print("3-PHASE AC METER");
  lcd.setCursor(2, 2);
  lcd.println("CONNECTING BLYNK");
  // showWaitScreen(400);
  delay(1000);
  lcd.clear();
}

void loop() {
  lcd.setCursor(4,0);
  lcd.print ("PHASE-1 (R)");
  
  float tegangan1 = random(2000, 2201)/10.0;
  lcd.setCursor(0,1); lcd.print (tegangan1,1);
  lcd.setCursor(7,1); lcd.print ("V");
  
  float arus1 = random(0, 20)/10.0;
  lcd.setCursor(9,1); lcd.print (arus1);
  lcd.setCursor(14,1); lcd.print ("A");

  float power1 = tegangan1 * arus1;
  float S1 = tegangan1 * arus1;
  float pf1 = power1 / S1;
  float pf1Angle = acos(pf1)*(180.0 / PI);
  float var1 = tegangan1 * arus1 * sin(pf1Angle *(PI / 180.0));
  lcd.setCursor(0,2); lcd.print (power1,1); lcd.print(" ");
  lcd.setCursor(7,2); lcd.print ("W");
  lcd.setCursor(9,2); lcd.print (pf1);
  lcd.setCursor(14,2); lcd.print ("Pf");
  lcd.setCursor(0,3); lcd.print (var1,1); lcd.print(" ");
  lcd.setCursor(7,3); lcd.print ("VAR");



  delay(1000);

  
}

void showWaitScreen(int delayMillis) {
  lcd.setCursor(4, 3);
  lcd.print("[..........]");
  lcd.setCursor(5, 3);
  for (byte i = 0; i < 10; i++) {
    delay(delayMillis);
    lcd.print("=");
  }
}