#include <Arduino.h>
#include <SPI.h>
#include <SD.h>

#define BUZZER_PIN 23
#define SD_CS 26
#define MISO 32
#define SCK 33
#define MOSI 25

//MOSI auf DI und MISO auf DO.
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(BUZZER_PIN, OUTPUT); 
  
  SPI.begin(SCK,MISO,MOSI);
  Serial.println("SPI initialized");

  if (!SD.begin(SD_CS)) {
    Serial.println("SD Card Mount Failed");
    while (1);
  }
  Serial.println("SD started");
  Serial.println("Receiver Setup complete.");

}

void loop() {
  // put your main code here, to run repeatedly:
  delay(1000); // this speeds up the simulation
  Serial.println("test");
  tone(BUZZER_PIN, 2000, 200); // High tone for ACK, 2000 Hz for 200 milliseconds
  noTone(BUZZER_PIN); // Stop tone
  delay(1000);
  tone(BUZZER_PIN, 2000, 200);
  noTone(BUZZER_PIN); // Stop tone
  delay(1000);
  tone(BUZZER_PIN, 2000, 200);
  noTone(BUZZER_PIN); // Stop tone
  delay(1000);

}