KC868-A8 OpenPLC Function Blocks for Digital input

Code:
#include <Arduino.h>

//#include <Wire.h>

#include <PCF8574.h>



// PCF8574 input address

#define I2C_INPUTS_ADR 0x22



PCF8574 pcf_in(I2C_INPUTS_ADR);



void setup()

{

    // ESP32 KC868 default I2C pins

    Wire.begin(4, 5); // SDA, SCL



    // Initialize PCF8574

    pcf_in.begin();



    // Configure PCF8574 pins as inputs

    pcf_in.pinMode(P0, INPUT);

    pcf_in.pinMode(P1, INPUT);

    pcf_in.pinMode(P2, INPUT);

    pcf_in.pinMode(P3, INPUT);

    pcf_in.pinMode(P4, INPUT);

    pcf_in.pinMode(P5, INPUT);

    pcf_in.pinMode(P6, INPUT);

    pcf_in.pinMode(P7, INPUT);



}



void loop()

{

    // KC868 inputs are active LOW

    IN_0 = (pcf_in.digitalRead(P0) == LOW);

    IN_1 = (pcf_in.digitalRead(P1) == LOW);

    IN_2 = (pcf_in.digitalRead(P2) == LOW);

    IN_3 = (pcf_in.digitalRead(P3) == LOW);

    IN_4 = (pcf_in.digitalRead(P4) == LOW);

    IN_5 = (pcf_in.digitalRead(P5) == LOW);

    IN_6 = (pcf_in.digitalRead(P6) == LOW);

    IN_7 = (pcf_in.digitalRead(P7) == LOW);

}