#include <LiquidCrystal_I2C.h>
#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>

LiquidCrystal_I2C lcd(0x27, 20, 4);
Adafruit_MPU6050 mpu;

int relay = 18;
int microphone = 35;
int ledtelegram = 32;

int buttonState1 = LOW;             // Current state of the first button  (Mic)
int lastButtonState1 = LOW;         // Previous state of the first button

// The debounce time; increase if the output flickers
unsigned long debounceDelay = 50;

// Timers for debouncing
unsigned long lastDebounceTime1 = 0;

unsigned long previousMillis = 0;
const long interval = 1000; //1 sec delay

float car_temp;
float x = 0;
float y = 0;
float z = 0;
bool statussend = 0;

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();

  lcd.setCursor(0, 0);
  lcd.print("Baby Car Monitoring");
  pinMode(relay, OUTPUT);
  pinMode(microphone, INPUT_PULLUP);
  pinMode(ledtelegram, OUTPUT);

  // Try to initialize!
  if (!mpu.begin()) {
    Serial.println("Failed to find MPU6050 chip");
    while (1) {
      delay(10);
    }
  }
  Serial.println("MPU6050 Found!");

}

void loop() {

  //##############Vibration Sensor#################################
  sensors_event_t a, g, temp;
  mpu.getEvent(&a, &g, &temp);

  x = g.gyro.x;
  y = g.gyro.y;
  z = g.gyro.z;

  if ((x != 0 || y != 0 || z != 0)&& statussend == 0) { //detect vibration on axis x,y,z
    statussend = 1;
    lcd.clear();
    Serial.println("Vibration detected");
    digitalWrite(ledtelegram, HIGH);
    lcd.setCursor(0, 0);
    lcd.print(" Vibration detected ");
    lcd.setCursor(0, 1);
    lcd.print("   Send 2 Telegram   ");
    digitalWrite(relay, HIGH);  //alarm triggered
    delay(5000);
    digitalWrite(ledtelegram, LOW);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Baby Car Monitoring");
    lcd.setCursor(0, 1);
    lcd.print(" Vibration detected ");
  }

  unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    lcd.setCursor(0, 2);
    lcd.print(" Car Temp:          ");
    car_temp = temp.temperature;
    lcd.setCursor(10, 2);
    lcd.print(car_temp);
    lcd.write(223); // Code for the degree symbol in many character sets
    lcd.print("C");

    Serial.print("Rotation X: ");
    Serial.print(g.gyro.x);
    Serial.print(", Y: ");
    Serial.print(g.gyro.y);
    Serial.print(", Z: ");
    Serial.print(g.gyro.z);
    Serial.println(" rad/s");

  }

  //################################################################


  //##############microphone button debounce########################
  // Read the state of the first button
  int reading1 = digitalRead(microphone);

  // Check if the button state has changed
  if (reading1 != lastButtonState1) {
    lastDebounceTime1 = millis();
  }

  // If the button state has been stable for longer than the debounce delay, update the button state
  if ((millis() - lastDebounceTime1) > debounceDelay) {
    if (reading1 != buttonState1) {
      buttonState1 = reading1;

      if (buttonState1 == HIGH) {
        Serial.println("Button mic pressed");
        digitalWrite(ledtelegram, HIGH);
        lcd.setCursor(0, 0);
        lcd.print("   Voice detected   ");
        lcd.setCursor(0, 1);
        lcd.print("   Send 2 Telegram   ");
        digitalWrite(relay, HIGH);  //alarm triggered
        delay(5000);
        digitalWrite(ledtelegram, LOW);
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Baby Car Monitoring");
        lcd.setCursor(0, 1);
        lcd.print("   Voice detected   ");
      }
    }
  }

  lastButtonState1 = reading1;

  //############################################################


}