[arduino code examples for A6v3]-01 Turn ON/OFF OUTPUT

Code:
/*

 Blink led on PIN0

 by Mischianti Renzo <http://www.mischianti.org>



 https://www.mischianti.org/2019/01/02/pcf8574-i2c-digital-i-o-expander-fast-easy-usage/

*/



#include "Arduino.h"

#include "PCF8574.h"



// Set i2c address

PCF8574 pcf8574(0x24);



void setup()

{

  Wire.begin(12, 11); // SDA: GPIO12, SCL: GPIO11

    Serial.begin(115200);

//    delay(1000);



    // Set pinMode to OUTPUT

    pcf8574.pinMode(P0, OUTPUT);

  pcf8574.pinMode(P1, OUTPUT);

  pcf8574.pinMode(P2, OUTPUT);

  pcf8574.pinMode(P3, OUTPUT);

  pcf8574.pinMode(P4, OUTPUT);

  pcf8574.pinMode(P5, OUTPUT);





  pcf8574.digitalWrite(P0, HIGH);

  pcf8574.digitalWrite(P1, HIGH);

  pcf8574.digitalWrite(P2, HIGH);

  pcf8574.digitalWrite(P3, HIGH);

  pcf8574.digitalWrite(P4, HIGH);

  pcf8574.digitalWrite(P5, HIGH);



    Serial.print("Init pcf8574...");

    if (pcf8574.begin()){

        Serial.println("OK");

    }else{

        Serial.println("KO");

    }

}



void loop()

{

    delay(300);

    pcf8574.digitalWrite(P0, LOW);

  delay(300);

  pcf8574.digitalWrite(P1, LOW);

  delay(300);

  pcf8574.digitalWrite(P2, LOW);

  delay(300);

  pcf8574.digitalWrite(P3, LOW);

  delay(300);

  pcf8574.digitalWrite(P4, LOW);

  delay(300);

  pcf8574.digitalWrite(P5, LOW);

  delay(300);

}