[arduino code examples for TA]-01 Turn ON/OFF relay

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



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

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



#define SDA_PIN 8        // I2C SDA pin

#define SCL_PIN 18       // I2C SCL pin



#define RELAY1 14        // Relay 1 (PCF8575 CH15)

#define RELAY2 15       // Relay 2 (PCF8575 CH16)



#define I2C_ADDRESS 0x22 // I2C address of PCF8575



PCF8575 pcf8575(I2C_ADDRESS); // Create PCF8575 object



void setup() {

    Wire.begin(SDA_PIN, SCL_PIN); // Initialize I2C bus

    Serial.begin(115200);

    Serial.println("PCF8575 Relay Control: Starting...");



    pcf8575.begin(); // Initialize PCF8575



    // Initialize relay state, default OFF (HIGH)

    pcf8575.write(RELAY1, HIGH);

    pcf8575.write(RELAY2, HIGH);

    Serial.println("All relays are OFF");

}



void loop() {

    Serial.println("Turning Relay 1 ON");

    pcf8575.write(RELAY1, LOW); // Turn ON relay 1

    delay(2000);

    Serial.println("Turning Relay 1 OFF");

    pcf8575.write(RELAY1, HIGH); // Turn OFF relay 1

    delay(2000);



    Serial.println("Turning Relay 2 ON");

    pcf8575.write(RELAY2, LOW); // Turn ON relay 2

    delay(2000);

    Serial.println("Turning Relay 2 OFF");

    pcf8575.write(RELAY2, HIGH); // Turn OFF relay 2

    delay(2000);

}