[arduino code examples for A32 Pro]-05 Read free GPIO state

Code:
/*

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

 *

 * GPIO Status Monitoring

 *

 * This program monitors the status (high or low) of multiple GPIO pins on the ESP32-S3.

 * It prints the status of the pins to the serial monitor whenever a change is detected.

 *

 * GPIO Pins Monitored:

 * - GPIO 1

 * - GPIO 2

 * - GPIO 38

 * - GPIO 0

 * - GPIO 21

 *

 * Hardware Requirements:

 * - Connect the pins to appropriate devices or pull them to HIGH/LOW for testing

 */



#define GPIO_PIN_1  1

#define GPIO_PIN_2  2

#define GPIO_PIN_38 38

#define GPIO_PIN_0  0

#define GPIO_PIN_21 21



// Store the previous state of the GPIO pins

bool prevState[5] = {false, false, false, false, false}; // Adjusted to 5 elements



void setup() {

  // Initialize serial communication for debugging purposes

  Serial.begin(115200); // Initialize the serial monitor at 115200 baud

  while (!Serial);      // Wait for the serial monitor to open



  // Initialize GPIO pins as inputs

  pinMode(GPIO_PIN_1, INPUT);

  pinMode(GPIO_PIN_2, INPUT);

  pinMode(GPIO_PIN_38, INPUT);

  pinMode(GPIO_PIN_0, INPUT);

  pinMode(GPIO_PIN_21, INPUT);



  Serial.println("GPIO Status Monitoring Started");

}



void loop() {

  // Read the current state of each GPIO pin

  bool currentState[5]; 

  currentState[0] = digitalRead(GPIO_PIN_1);

  currentState[1] = digitalRead(GPIO_PIN_2);

  currentState[2] = digitalRead(GPIO_PIN_38);

  currentState[3] = digitalRead(GPIO_PIN_0);

  currentState[4] = digitalRead(GPIO_PIN_21); 



  // Check for changes in GPIO pin states

  for (int i = 0; i < 5; i++) { 

    if (currentState[i] != prevState[i]) {

      // Print the pin number and its new state if it has changed

      Serial.print("GPIO ");

      Serial.print(i == 0 ? GPIO_PIN_1 : 

                   i == 1 ? GPIO_PIN_2 : 

                   i == 2 ? GPIO_PIN_38 : 

                   i == 3 ? GPIO_PIN_0 : GPIO_PIN_21);

      Serial.print(" changed to ");

      Serial.println(currentState[i] ? "HIGH" : "LOW");

      // Update the previous state

      prevState[i] = currentState[i];

    }

  }



  // Delay to avoid flooding the serial monitor

  delay(100); // Adjust the delay as needed

}