[arduino code examples for T64M]-01 Turn ON/OFF OUTPUT

Code:
/*

 * Made by KinCony IoT: https://www.kincony.com

 *

 * This program controls 64 outputs using 4 PCF8575 I/O expanders.

 * It sequentially turns on outputs 1 to 64, then turns them off from 64 to 1, in a loop.

 * 

 * I2C Pin Definitions:

 * - SDA: GPIO 48

 * - SCL: GPIO 47

 *

 * PCF8575 Addresses:

 * - Output  1~16 : 0x25

 * - Output 17~32: 0x24

 * - Output 33~48: 0x21

 * - Output 49~64: 0x20

 *

 * Delay Time:

 * - 200 milliseconds between switching outputs

 */



#include <Wire.h>        // Include the Wire library for I2C communication

#include <PCF8575.h>     // Include the PCF8575 library



#define SDA_PIN 48       // Define SDA pin

#define SCL_PIN 47       // Define SCL pin

#define DELAY_TIME 200   // Delay between operations in milliseconds



// Create PCF8575 objects for each chip

PCF8575 pcf_1(0x25); // output  1-16

PCF8575 pcf_2(0x24); // output 17-32

PCF8575 pcf_3(0x21); // output 33-48

PCF8575 pcf_4(0x20); // output 49-64



// Array of pointers to PCF8575 objects

PCF8575* pcfArray[4] = { &pcf_1, &pcf_2, &pcf_3, &pcf_4 };



void setup() {

  Wire.begin(SDA_PIN, SCL_PIN);  // Initialize I2C with specified pins

  Serial.begin(115200);

  Serial.println("PCF8575 64-Channel Output Control Starting...");



  // Initialize all PCF8575 modules and set all pins to HIGH (OFF)

  for (int i = 0; i < 4; i++) {

    pcfArray[i]->begin();

    for (int j = 0; j < 16; j++) {

      pcfArray[i]->write(j, HIGH);  // Turn off all outputs initially

    }

  }

}



void loop() {

  // Turn ON outputs from 1 to 64 (LOW)

  for (int channel = 0; channel < 64; channel++) {

    int chipIndex = channel / 16;         // Which PCF8575 (0 to 3)

    int pinIndex = channel % 16;          // Which pin on that PCF8575 (0 to 15)

    pcfArray[chipIndex]->write(pinIndex, LOW); // Turn ON the output

    delay(DELAY_TIME);

  }



  // Turn OFF outputs from 64 to 1 (HIGH)

  for (int channel = 63; channel >= 0; channel--) {

    int chipIndex = channel / 16;

    int pinIndex = channel % 16;

    pcfArray[chipIndex]->write(pinIndex, HIGH); // Turn OFF the output

    delay(DELAY_TIME);

  }

}