[arduino code examples for A32 Pro]-11 How to use digital input port trigger relay

Code:
/*

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



  Program functionality:

  This program uses ESP32-S3 to read inputs from two PCA9555 I/O expander chips (I2C addresses 0x24 and 0x25)

  for channels 1-32, and control corresponding relays using two PCA9555 I/O expander chips (I2C addresses 0x21 and 0x22)

  for controlling 32 relays (1-32). When input1 is triggered, relay1 is activated; when input2 is triggered, 

  relay2 is activated, and so on.



  The I2C bus is initialized on GPIO pins 11 (SDA) and 10 (SCL) with a frequency of 100kHz.

*/



#include <PCA95x5.h>

#include <Wire.h>



// Initialize the PCA9555 objects for reading inputs (channels 1-32)

PCA9555 input_ioex1;  // For channels 1-16 (I2C address 0x24)

PCA9555 input_ioex2;  // For channels 17-32 (I2C address 0x25)



// Initialize the PCA9555 objects for controlling relays (channels 1-32)

PCA9555 output_ioex1; // For relays 1-16 (I2C address 0x21)

PCA9555 output_ioex2; // For relays 17-32 (I2C address 0x22)



void setup() {

    // Start serial communication for debugging

    Serial.begin(115200);

    delay(10);



    // Initialize the I2C bus with GPIO 11 as SDA and GPIO 10 as SCL, 100kHz frequency

    Wire.begin(11, 10, 100000);



    // Configure the input PCA9555 chips (for inputs 1-32)

    input_ioex1.attach(Wire, 0x24);  // I2C address 0x24 for inputs 1-16

    input_ioex1.polarity(PCA95x5::Polarity::ORIGINAL_ALL);  // No polarity inversion

    input_ioex1.direction(PCA95x5::Direction::IN_ALL);  // Set all pins as inputs



    input_ioex2.attach(Wire, 0x25);  // I2C address 0x25 for inputs 17-32

    input_ioex2.polarity(PCA95x5::Polarity::ORIGINAL_ALL);  // No polarity inversion

    input_ioex2.direction(PCA95x5::Direction::IN_ALL);  // Set all pins as inputs



    // Configure the output PCA9555 chips (for relays 1-32)

    output_ioex1.attach(Wire, 0x21);  // I2C address 0x21 for relays 1-16

    output_ioex1.polarity(PCA95x5::Polarity::ORIGINAL_ALL);  // No polarity inversion

    output_ioex1.direction(PCA95x5::Direction::OUT_ALL);  // Set all pins as outputs

    output_ioex1.write(PCA95x5::Level::H_ALL);  // Initialize all relays to OFF (HIGH)



    output_ioex2.attach(Wire, 0x22);  // I2C address 0x22 for relays 17-32

    output_ioex2.polarity(PCA95x5::Polarity::ORIGINAL_ALL);  // No polarity inversion

    output_ioex2.direction(PCA95x5::Direction::OUT_ALL);  // Set all pins as outputs

    output_ioex2.write(PCA95x5::Level::H_ALL);  // Initialize all relays to OFF (HIGH)



    delay(50);  // Wait for initialization to complete

}



void loop() {

    // Read the input states from the first PCA9555 chip (inputs 1-16)

    uint16_t inputs_1_16 = input_ioex1.read();

    

    // Iterate through each input (1-16) and control corresponding relay output

    for (int i = 0; i < 16; ++i) {

        bool input_state = bitRead(inputs_1_16, i);  // Read the state of each input (0 = triggered, 1 = not triggered)

        if (input_state == 0) {  // If the input is triggered (pressed, i.e., LOW)

            output_ioex1.write((PCA95x5::Port::Port)i, PCA95x5::Level::L);  // Activate corresponding relay (LOW)

        } else {

            output_ioex1.write((PCA95x5::Port::Port)i, PCA95x5::Level::H);  // Deactivate relay (HIGH)

        }

    }



    // Read the input states from the second PCA9555 chip (inputs 17-32)

    uint16_t inputs_17_32 = input_ioex2.read();

    

    // Iterate through each input (17-32) and control corresponding relay output

    for (int i = 0; i < 16; ++i) {

        bool input_state = bitRead(inputs_17_32, i);  // Read the state of each input (0 = triggered, 1 = not triggered)

        if (input_state == 0) {  // If the input is triggered (pressed, i.e., LOW)

            output_ioex2.write((PCA95x5::Port::Port)i, PCA95x5::Level::L);  // Activate corresponding relay (LOW)

        } else {

            output_ioex2.write((PCA95x5::Port::Port)i, PCA95x5::Level::H);  // Deactivate relay (HIGH)

        }

    }



    delay(100);  // Small delay for stability

}