#define BLYNK_PRINT Serial

#define BLYNK_TEMPLATE_ID "TMPL26V4fGv5q"
#define BLYNK_TEMPLATE_NAME "Test"
#define BLYNK_AUTH_TOKEN "XEHxNF_Ur1Nt2p7wB5B20dNI1ZUwj34P"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <SoftwareSerial.h>

#define AO 34
#define BUZZER_PIN 19
Adafruit_SSD1306 display = Adafruit_SSD1306(128, 64, &Wire, 4);

unsigned int output;
int Decibels;
char auth[] = "XEHxNF_Ur1Nt2p7wB5B20dNI1ZUwj34P"; // Update with your Blynk auth token
char ssid[] = "Wokwi-GUEST"; // Update with your WiFi SSID
char pass[] = ""; // Update with your WiFi password

BLYNK_READ(V0) {
  Blynk.virtualWrite(V0, Decibels);
}

void setup() {
  Serial.begin(115200);
  pinMode(AO, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  //pinMode(micpin, INPUT);
  
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }

  delay(2000);
  display.clearDisplay();
  display.setTextColor(WHITE);

  Blynk.begin(auth, ssid, pass);
}

void loop() {
  Blynk.run();
  float mic = analogRead(A0);
  float PeakToPeak = voltageToDB(mic);

  Decibels = map(PeakToPeak, 50, 500, 49.5, 90);

  display.setTextSize(2);
  display.setCursor(0, 10);
  display.print(Decibels);

  display.setTextSize(2);
  display.setCursor(40, 10);
  display.print("db");
  display.display();

  if (Decibels <= 50) {
    display.setTextSize(2);
    display.setCursor(0, 30);
    display.print("LOW");
    display.display();
  } else if (Decibels > 50 && Decibels < 75) {
    display.setTextSize(2);
    display.setCursor(0, 30);
    display.print("Moderate");
    display.display();
  } else if (Decibels >= 75) {
    display.setTextSize(2);
    display.setCursor(0, 30);
    display.print("HIGH");
    display.display();
    tone(BUZZER_PIN, 1000); // 1000Hz tone
    delay(1000); // Buzz for 1 second
    noTone(BUZZER_PIN); // Stop buzzing
    delay(1000); // Wait for 1 second
  }

  delay(1000);
  display.clearDisplay();
}
// Example mapping function
float voltageToDB(float voltage) {
  // You need to know the calibration factor and reference voltage for this conversion
  float sensitivity = 30; // Sensitivity of the microphone (you should adjust this)
  float referenceVoltage = 5.0; // Reference voltage used

  // Calculate the voltage ratio
  float voltageRatio = voltage / referenceVoltage;

  // Convert to decibels (assuming a linear relationship between voltage and decibels)
  float dB = 20 * log10(voltageRatio) + sensitivity;

  return dB;
}

// Example usage: