[arduino code examples for G1]-02 Read free GPIO state

Code:
/*

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

 *

 * GPIO Status Monitoring with Change Detection

 *

 * 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.

 * 

 * Additional Functionality: 

 * - The program now monitors 11 GPIO pins, not just the previously listed ones.

 * - GPIO pins include: GPIO 15, 16, 17, 40, 13, 14, 21, 4, 5, 6, 7.

 * - For each pin, whenever its state changes (from HIGH to LOW or vice versa), the new state is printed to the serial monitor.

 * 

 * GPIO Pins Monitored:

 * - GPIO 15

 * - GPIO 16

 * - GPIO 17

 * - GPIO 40

 * - GPIO 13

 * - GPIO 14

 * - GPIO 21

 * - GPIO 4

 * - GPIO 5

 * - GPIO 6

 * - GPIO 7

 *

 * Hardware Requirements:

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

 * - Ensure that the ESP32-S3 is powered and connected to a serial monitor to observe the output.

 *

 * How it works:

 * - The setup function initializes the serial communication and configures the GPIO pins as inputs.

 * - The loop function continuously checks the state of each GPIO pin.

 * - If a pin's state changes, the new state is printed to the serial monitor, along with the corresponding pin number.

 * - The program uses a delay to prevent excessive serial prints, which can be adjusted as necessary.

 */





#define GPIO_PIN_15 15

#define GPIO_PIN_16 16

#define GPIO_PIN_17 17

#define GPIO_PIN_40 40

#define GPIO_PIN_13 13

#define GPIO_PIN_14 14

#define GPIO_PIN_21 21

#define GPIO_PIN_4 4

#define GPIO_PIN_5 5

#define GPIO_PIN_6 6

#define GPIO_PIN_7 7



// Store the previous state of the GPIO pins

bool prevState[11] = {false, false, false, false, false, false, false, false, false, false, false};



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_15, INPUT);

  pinMode(GPIO_PIN_16, INPUT);

  pinMode(GPIO_PIN_17, INPUT);

  pinMode(GPIO_PIN_40, INPUT);

  pinMode(GPIO_PIN_13, INPUT);

  pinMode(GPIO_PIN_14, INPUT);

  pinMode(GPIO_PIN_21, INPUT);

  pinMode(GPIO_PIN_4, INPUT);

  pinMode(GPIO_PIN_5, INPUT);

  pinMode(GPIO_PIN_6, INPUT);

  pinMode(GPIO_PIN_7, INPUT);



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

}



void loop() {

  // Read the current state of each GPIO pin

  bool currentState[11];

  currentState[0] = digitalRead(GPIO_PIN_15);

  currentState[1] = digitalRead(GPIO_PIN_16);

  currentState[2] = digitalRead(GPIO_PIN_17);

  currentState[3] = digitalRead(GPIO_PIN_40);

  currentState[4] = digitalRead(GPIO_PIN_13);

  currentState[5] = digitalRead(GPIO_PIN_14);

  currentState[6] = digitalRead(GPIO_PIN_21);

  currentState[7] = digitalRead(GPIO_PIN_4);

  currentState[8] = digitalRead(GPIO_PIN_5);

  currentState[9] = digitalRead(GPIO_PIN_6);

  currentState[10] = digitalRead(GPIO_PIN_7);  



  // Check for changes in GPIO pin states

  for (int i = 0; i < 11; 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_15 : 

                   i == 1 ? GPIO_PIN_16 : 

                   i == 2 ? GPIO_PIN_17 : 

                   i == 3 ? GPIO_PIN_40 : 

                   i == 4 ? GPIO_PIN_13 : 

                   i == 5 ? GPIO_PIN_14 : 

                   i == 6 ? GPIO_PIN_21 : 

                   i == 7 ? GPIO_PIN_4 :

                   i == 8 ? GPIO_PIN_5 :                                                           

                   i == 9 ? GPIO_PIN_6 : GPIO_PIN_7);

      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

}