Door opening counter with LED display and Battery Standby

// with sleep mode and count button wake-up
// Cut 1637 Power on low side via Pin LED_power !!!
// Tested 05/05/2024 JLG

#include <LowPower.h>
#include "SevenSegmentTM1637.h"
#include "SevenSegmentExtended.h"



// IO defines
#define Button 2 // Button on interrupt to wake-up from sleep
#define LED_power 7 // powered by pin (20mA max)

#define onboard_LED 13
#define Wreset 5
#define COUNT_0 6
#define PIN_CLK 3   // define CLK pin (any digital pin)
#define PIN_DIO 4  // define DIO pin (any digital pin)
SevenSegmentExtended    display1(PIN_CLK, PIN_DIO);

int counter=0;


void wakeUp()
{
  // Just a handler for the pin interrupt.
}




void setup() {
  digitalWrite(Wreset, HIGH);
  pinMode(Wreset, OUTPUT);
  
  digitalWrite(onboard_LED, LOW);
  pinMode(onboard_LED, OUTPUT);
  
  digitalWrite(LED_power, LOW);
  pinMode(LED_power, INPUT);

  
  pinMode(Button, INPUT_PULLUP);
  pinMode(COUNT_0, INPUT_PULLUP);

  Serial.begin(9600);


    counter=0;
    
}



void loop() {

  attachInterrupt(digitalPinToInterrupt(Button), wakeUp, FALLING); // new syntax
  LowPower.powerDown(SLEEP_FOREVER, ADC_OFF, BOD_OFF);



  // after Button Press, continue from here
  detachInterrupt(digitalPinToInterrupt(Button));

  // Power ON and initialize
  
  pinMode(LED_power, OUTPUT);
  
  digitalWrite(onboard_LED, HIGH);
   
  
  // update LED

counter++;
if ( digitalRead(COUNT_0)== LOW ) counter = 0; // reset counter
display1.begin();         
display1.setBacklight(100);
display1.printNumber(counter);
 
 delay(2000); // showtime 2 sec
  
  
  // cut power
  
  pinMode(LED_power, INPUT);
  digitalWrite(onboard_LED, LOW);
  digitalWrite(Wreset, LOW);
}