TCA_read_digital

#include "EEPROM.h"

#include "Wire.h"
#include "TCA9555.h"
TCA9555 TCA1(0x20);
TCA9555 TCA2(0x21);

unsigned long cur_time, old_time;
int ledState = LOW;

byte pin_tca[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
byte pin_led = 16;
byte dt_tca1[20];
byte dt_tca2[20];

byte addr_status = 2;
int dt_status = 0;

void setup() {
  // put your setup code here, to run once:
  delay(10);
  Serial.begin(115200);
  Serial.println();

    if (!EEPROM.begin(1000)) {
      Serial.println("Failed to initialise EEPROM");
      Serial.println("Restarting...");
      delay(1000);
      ESP.restart();
    }
    delay(100);

  dt_status = EEPROM.readInt(addr_status);
  if(dt_status == -1 )dt_status = 0;
  Serial.print("dt_status: ");
  Serial.println(dt_status);
  delay(2000);

  pinMode(pin_led, OUTPUT);

  Wire.begin();
  TCA1.begin();
  TCA2.begin();

  for (int i = 0; i < sizeof(pin_tca); i++) {
    Serial.print(i); Serial.print(",");
    TCA1.pinMode(pin_tca[i], INPUT_PULLUP);
    TCA2.pinMode(pin_tca[i], INPUT_PULLUP);
  }
  Serial.println();
}

void loop() {
  // put your main code here, to run repeatedly:
  cur_time = millis();
  if (cur_time - old_time >= 100) {
    ledState = !ledState;
    digitalWrite(pin_led, ledState);
    Serial.print("TCA1: ");
    for (int i = 0; i < sizeof(pin_tca) - 4; i++) {
      dt_tca1[i] = TCA1.digitalRead(pin_tca[i]);
      Serial.print(dt_tca1[i]);
      Serial.print(",");
      if(dt_tca1[i] == 0){
        dt_status ++;
        EEPROM.writeInt(addr_status, dt_status);
        EEPROM.commit();
      }
      delay(20);
    }
    Serial.println();
    Serial.print("TCA2: ");
    for (int i = 0; i < sizeof(pin_tca) - 4; i++) {
      dt_tca2[i] = TCA2.digitalRead(pin_tca[i]);
      Serial.print(dt_tca2[i]);
      Serial.print(",");
      if(dt_tca2[i] == 0){
        dt_status ++;
        EEPROM.writeInt(addr_status, dt_status);
        EEPROM.commit();
      }
      delay(20);
    }
    Serial.println();
    Serial.print("dt_status: ");
    Serial.println(dt_status);
    old_time = millis();
  }
}