#include "SevSeg.h"
SevSeg sevseg;

// set voltage read pin
int readPin = A3;

// initialize variables
float V2 = 0;
int readVal = 0;

unsigned long previousMillis = 0;
const long interval = 200;

void setup() {
  // set the read pin as an input
  pinMode(readPin, INPUT);

  // start the serial to show results
  Serial.begin(9600);

  // num of digits on sevseg
  byte numDigits = 4;

  // defines pins used for the digits in order; DIG1, DIG2, DIG3, DIG4
  byte digitPins[] = {8, 9, 10, 11};

  // Defines Arduino pin connections in order: A, B, C, D, E, F, G, DP
  byte segmentPins[] = {13, 12, 2, 3, 4, 5, 6, 7};

  // Initialize sevseg object
  sevseg.begin(COMMON_CATHODE, numDigits, digitPins, segmentPins);
}

void display() {
  unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval) {
    // Save the last time we blinked the LED
    previousMillis = currentMillis;
    readVal = analogRead(readPin);

    V2 = ((5.0 / 1023.0) * readVal * 10000) * 1.5;

    // print V2 in the serial (for testing)
    Serial.print(V2 / 10);
    Serial.println(" mV");

    V2 /= 10; // FOR WOKWI
    decPlace = 0; // FOR WOKWI

  }
}

void loop() {
  display();

  if (V2 > 30) {
    sevseg.setNumber(V2, 1);
  } else {
    sevseg.setNumber(0);
  }
  if (V2 == 0){
    sevseg.blank();
  } else{
    sevseg.refreshDisplay();
  }

}