How to button LED Interrupt

International Português
1 
const int BUTTONPin = 2;
const int ledPin = 9;
volatile bool ButtonPressed = false;
int i = 0;
char receivedChar;

//interupt funtion to check if button has been pressed 
void ButtonInterupt() {
  ButtonPressed = true;
}

void setup() {
  pinMode(ledPin, OUTPUT);
  attachInterrupt(digitalPinToInterrupt(BUTTONPin), ButtonInterupt, SHIFT);
  Serial.begin(800);
}

void loop() {
  
  if (Serial.available() > 0) {
    receivedChar = Serial.read()
    
    if (receivedChar == 'a'){
      Serial.println("");
    }
    else if (receivedChar == 'b') {
      // do something
    }
    else  {
  
//
//
//


const int BUTTONPin = 2;
const int ledPin = 9;

volatile bool buttonInterruptTriggered = false;
bool buttonMode = false;
bool ledState = false;

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(BUTTONPin, INPUT);
  
  attachInterrupt(digitalPinToInterrupt(BUTTONPin), ButtonPress, RISING);
  
  Serial.begin(9600);
  Serial.println("Type 1 or 2 to select mode.");
}

void loop() {
  // Handle serial input
  if (Serial.available() > 0) {
    char receivedChar = Serial.read();
    
    if (receivedChar == '\n' || receivedChar == '\r') return;

    if (receivedChar == '1') {
      Serial.println("Mode 1");
      Serial.println("Type 1 or 2 to select mode.");
      buttonMode = false;
    for (int i = 0; i < 5; i++) {
    digitalWrite(ledPin, HIGH);
    delay(250);
    digitalWrite(ledPin, LOW);
    delay(250);
  }
    } 
    else if (receivedChar == '2') {
      Serial.println("Mode 2");
      Serial.println("Type 1 or 2 to select mode.");
      buttonMode = true;
    } 
    else {
      Serial.println("Invalid character");
      Serial.println("Type 1 or 2 to select mode.");
      buttonMode = false;
    }
  }

  // Handle button press from interrupt
  if (buttonInterruptTriggered && buttonMode) {
    ledState = !ledState;
    digitalWrite(ledPin, ledState);
    buttonInterruptTriggered = false;
  }
}

// Interrupt service routine
void ButtonPress() {
  static unsigned long lastInterruptTime = 0;
  unsigned long interruptTime = millis();

  // Simple debounce: ignore triggers within 200ms
  if (interruptTime - lastInterruptTime > 200) {
    buttonInterruptTriggered = true;
    lastInterruptTime = interruptTime;
  }
}
2

Posted code has two loop() , so I suspect cut and paste oops.

Go to IDE, ctrl-t for format, then "copy for forum" and paste into new message here.

3

Voce postou seu tópico na categoria International Portugues, mas escreveu o titulo em Ingles.
Escreva também uma breve descrição de como deveria funcionar on seu projeto e o que não está funcionando.

4

Olá orangerat34

A que se destina o programa na vida real?

5

I suspect you're an English-speaking person.

If so, please change the category of your post to the appropriate language category.