#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C LCD((0x27), 16, 2);

#define A 15
#define B 2
#define C 0
#define D 4
#define E 16
#define F 17
#define G 5
#define com1 19
#define com2 18
#define b1 14
#define b2 12
#define pot 34
#define led 13

int8_t n[10] = {
  0b01111110, // 0
  0b00110000, // 1
  0b01101101, // 2
  0b01111001, // 3
  0b00110011, // 4
  0b01011011, // 5
  0b00011111, // 6
  0b01110000, // 7
  0b01111111, // 8
  0b01110011  // 9
};

int contador = 20, tempo = 0; //
float nivel = 0;
bool sb1 = 0, sb2 = 0;

void setup() {
  Serial.begin(115200);
  pinMode(A, OUTPUT);
  pinMode(B, OUTPUT);
  pinMode(C, OUTPUT);
  pinMode(D, OUTPUT);
  pinMode(E, OUTPUT);
  pinMode(F, OUTPUT);
  pinMode(G, OUTPUT);
  pinMode(com1, OUTPUT);
  pinMode(com2, OUTPUT);
  pinMode(led, OUTPUT);
  pinMode(b1, INPUT);
  pinMode(b2, INPUT);

  LCD.init();
  LCD.backlight();
  LCD.setCursor(1,0);
  LCD.print("By Gabriel Luz");
  delay(1500);
  LCD.clear();
}

void loop() {
  nivel = map(analogRead(pot), 0, 4095, 0, 100);
  Contagem();
  print7seg(contador);
  tempo++;
  LCD.setCursor(0,0);
  LCD.print("Nivel: ");
  LCD.print(nivel);
  LCD.print("%  ");
  
  if(tempo == 1){
    if(contador > nivel){
      LCD.setCursor(0,1);
      LCD.print("Alerta de nivel ");
      digitalWrite(led, !digitalRead(led));
    } else{
      LCD.setCursor(0,1);
      LCD.print("Operacao normal ");
      digitalWrite(led, 0);
    }
  }
  if(tempo > 10)tempo = 0;
}

void Contagem(){
  if(digitalRead(b1) == HIGH && sb1 == 0){
    contador = contador + 5;
    sb1 = 1;
  }
  if(digitalRead(b2) == HIGH && sb2 == 0){
    contador = contador - 5;
    sb2 = 1;
  }
  if(digitalRead(b1) == LOW && sb1 == 1)sb1 = 0;
  if(digitalRead(b2) == LOW && sb2 == 1)sb2 = 0;
  if(contador < 0)contador = 0;
  if(contador > 99)contador = 99;
  delay(10);
  
}
void printDisplay(int v){
  digitalWrite(A, n[v] & 0b01000000);
  digitalWrite(B, n[v] & 0b00100000);
  digitalWrite(C, n[v] & 0b00010000);
  digitalWrite(D, n[v] & 0b00001000);
  digitalWrite(E, n[v] & 0b00000100);
  digitalWrite(F, n[v] & 0b00000010);
  digitalWrite(G, n[v] & 0b00000001);
}
void print7seg(int v){ 
  int u = 0, d = 0;
  u = v%10; // unidade

  d = v/10; // dezena

  printDisplay(u);
  digitalWrite(com1, 1);
  delay(5);
  digitalWrite(com1, 0);

  printDisplay(d);
  digitalWrite(com2, 1);
  delay(5);
  digitalWrite(com2, 0);
}