#define SW1 4
#define SW2 16

int KeyPressesSW1 = 0;
bool statusSW1 = false;
int KeyPressesSW2 = 0;
bool statusSW2 = false;

void IRAM_ATTR isrSW1 (){
  KeyPressesSW1 += 1;
  statusSW1 = true;
}

void IRAM_ATTR isrSW2 (){
  KeyPressesSW2 += 1;
  statusSW2 = true;
}

void setup() {
  Serial.begin(115200);
  pinMode(4,INPUT);
  pinMode(16,INPUT);
  attachInterrupt(4,isrSW1,CHANGE);
  attachInterrupt(16,isrSW2,CHANGE);
}

void loop() {
  // put your main code here, to run repeatedly:
  if(statusSW1){
    Serial.printf("SW1 press %u times\n",KeyPressesSW1);
    statusSW1=false;
  } 
  if(statusSW2){
    Serial.printf("SW2 press %u times\n",KeyPressesSW2);
    statusSW2=false;
  }
  
}