// Example for the TM1637 display with TM1637_RT library.
// By Koepel, 28 February 2023.
//
// Library: "TM1637_RT", https://github.com/RobTillaart/TM1637_RT

#include <TM1637.h>

TM1637 TM1, TM2, TM3, TM4;       // Each display needs its own object

int display1 = 21;
int display2 = 22;
int display3 = 23;
int display4 = 24;


/*const int buttonPin1up   = 34;
const int buttonPin1down = 35;
const int buttonPin2up   = 32;
const int buttonPin2down = 33;
const int buttonPin3up   = 5;
const int buttonPin3down = 17;
const int buttonPin4up   = 16;
const int buttonPin4down = 4;
*/

const int buttonPinsup[4]   = {34,32,5,16};
const int buttonPinsdown[4] = {35,33,17,4};
int UPVALUES[4] = {0,0,0,0};
int DOWNVALUES[4] = {0,0,0,0};

int prevButtonup[4] = {HIGH,HIGH,HIGH,HIGH}
int prevButtondown[4] = {HIGH,HIGH,HIGH,HIGH}


char buffer[5];             // buffer for third display

void setup()
{
  Serial.begin(115200);

  // -----------------------------------------
  // First display
  // -----------------------------------------
  TM1.begin(14, 12, 4);       //  clockpin, datapin, #digits
  TM1.displayClear();
  TM1.setBrightness(7);     // full brightness, default is 3
  TM1.displayInt(display1, 0); // Initial text on third display
  
  // -----------------------------------------
  // Second display
  // -----------------------------------------
  TM2.begin(26, 27, 4);       //  clockpin, datapin, #digits
  TM2.displayClear();
  TM2.setBrightness(7);     // full brightness, default is 3
  TM2.displayInt(display2, 0); // Initial text on third display

  // -----------------------------------------
  // Third display
  // -----------------------------------------
  TM3.begin(22, 23, 4);       //  clockpin, datapin, #digits
  TM3.displayClear();
  TM3.setBrightness(7);     // full brightness, default is 3
  TM3.displayInt(display3, 0); // Initial text on third display

  // -----------------------------------------
  // Fourth display
  // -----------------------------------------
  TM4.begin(18, 19, 4);       //  clockpin, datapin, #digits
  TM4.displayClear();
  TM4.setBrightness(7);     // full brightness, default is 3
  TM4.displayInt(display4, 0); // Initial text on third display

// displays OK


  for (int i = 0; i < 4; i++) {
    pinMode(buttonPinsup[i], INPUT_PULLUP);
  }
  for (int i = 0; i < 4; i++) {
    pinMode(buttonPinsdown[i], INPUT_PULLUP);
  }


}

void loop()
{

  for (int i = 0; i < 4; i++) {
    // Read the current state of the button
    int currentButtonup = digitalRead(buttonPinsup[i]);
    int currentButtondown = digitalRead(buttonPinsdown[i]);

    // Check if the button state has changed from HIGH to LOW
    if (prevButtonup[i] == HIGH && currentButtonup == LOW) {
      // Increment the corresponding UPVALUE
      UPVALUES[i]++;

      // Print the updated UPVALUE
      Serial.print("UPVALUE ");
      Serial.print(i);
      Serial.print(": ");
      Serial.println(UPVALUES[i]);

      // Wait until the button is released
      while (digitalRead(buttonPinsup[i]) == LOW);

      // Additional delay to avoid multiple increments from button bouncing
      delay(50);
    }
    if (prevButtonup[i] == HIGH && currentButtonup == LOW) {
      // Increment the corresponding UPVALUE
      UPVALUES[i]++;

      // Print the updated UPVALUE
      Serial.print("UPVALUE ");
      Serial.print(i);
      Serial.print(": ");
      Serial.println(UPVALUES[i]);

      // Wait until the button is released
      while (digitalRead(buttonPinsup[i]) == LOW);

      // Additional delay to avoid multiple increments from button bouncing
      delay(50);
    }
    // Update the previous button state
    prevButtonup[i] = currentButtonup;
    prevButtondown[i] = currentButtondown;




    }