ESP32 Forum

Posted: **Mon Sep 27, 2021 11:52 am**

Hello,

I was wondering the best way to go about interrupting a loop with a button push.. heres my code. It's towards the bottom... right now its not working.

thanks in advance.

Code: [Select all] [Expand/Collapse]

void processSlackMessage(String receivedpayload){
 
  DynamicJsonDocument doc(1024);
  deserializeJson(doc, receivedpayload);
  DeserializationError error = deserializeJson(doc, receivedpayload);
  if (error) {
    Serial.print(F("deserializeJson() failed with code "));
    Serial.println(error.c_str());
    return;
  }
  JsonObject obj = doc.as<JsonObject>();
  String type_msg = obj["type"];
  String texto = obj["text"];
  String channel = obj["channel"];
  if(type_msg.equals("message")){
    Serial.println(type_msg + " "+ channel + " " + texto);
    tft.fillScreen(TFT_BLACK); 
    tft.setTextColor(TFT_GOLD);
    tft.drawString("======Alert======", 10, 20, GFXFF);
    tft.drawString(texto, 10, 40, GFXFF);
    
    for (int i = 0; i <= 5; i++){ 
      buttonState=digitalRead(buttonPin);
      if (buttonState == LOW){
       i=0;
       break; 
    }
    else {
      digitalWrite(vibePin, HIGH);  
      delay(1000);          
      digitalWrite(vibePin, LOW);  
      delay(500); }
    }
 }
}

Moderators Note: Add Codebox

Posted: **Sat Oct 09, 2021 8:01 am**

If you want your loop to be indefinitely blocking on the interrupt, you can have the loop block an a semaphore that is given by the ISR
If you don't want your loop to be blocking, simply poll some global variable but with an adequate delay so that other tasks get a share CPU time. Don't forget to make that variable volatile.

ESP32 Forum

interrupting a loop with a button push

interrupting a loop with a button push

Re: interrupting a loop with a button push