/* project done by Turya Bhattacharjee
components used :- LCD display 16*2 , buzzer , LED 2 , NTC sensor , ultrasonic sensor accelerometer + gyroscope */
#define ECHOpin 5 // it defines the ECHO pin of the sensor to pin 5 of Arduino  
#define TRIGpin 6   
// we have defined the variable  
long duration; // variable for the duration of sound wave travel  
int distance; // variable for the distance measurement  
#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>
#include <LiquidCrystal.h>
LiquidCrystal lcd (12, 11, 10, 9, 8, 7);
Adafruit_MPU6050 mpu; 
int greenLED1=7;
int redLED2=8;
int blueLED3= 13;
int buzzer=2;
int ThermistorPin = 0;
int Vo;
float R1 = 100000;
float logR2, R2, T;
float c1 = 1.009249522e-03, c2 = 2.378405444e-04, c3 = 2.019202697e-07;

void setup() {
  lcd.begin(20,4);
   pinMode(TRIGpin, OUTPUT); // It sets the ECHO pin as OUTPUT  
  pinMode(ECHOpin, INPUT); // It sets the TRIG pin as INPUT  
  Serial.println("Test of the Ultrasonic Sensor HC-SR04"); // It will appear on Serial Monitor  
  Serial.println("with the Arduino UNO R3 board");  
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);
pinMode(2, OUTPUT);
pinMode(13, OUTPUT);
Serial.begin(115200);
if (!mpu.begin()) {
		Serial.println("Failed to find MPU6050 chip");
		while (1) {
		  delay(10);
      }
	}
	lcd.print("MPU6050 Found!");
  delay(500);
  lcd.clear();
  delay(500);

	// set accelerometer range to +-8G
	mpu.setAccelerometerRange(MPU6050_RANGE_8_G);

	// set gyro range to +- 500 deg/s
	mpu.setGyroRange(MPU6050_RANGE_500_DEG);

	// set filter bandwidth to 21 Hz
	mpu.setFilterBandwidth(MPU6050_BAND_21_HZ);

	delay(100);

}


void loop() {

	// It first sets the TRIG pin at LOW for 2 microseconds  
  digitalWrite(TRIGpin, LOW);  
  delayMicroseconds(4);  
  // It now sets TRIG pin at HIGH for 15 microseconds  
  digitalWrite(TRIGpin, HIGH);  
  delayMicroseconds(15);  
  digitalWrite(TRIGpin, LOW);  
  // It will read the ECHO pin and will return the time   
  duration = pulseIn(ECHOpin, HIGH);  
  // distance formula  
  distance = duration*(0.034/2); // (speed in microseconds)  
  // Speed of sound wave (340 m/s)divided by 2 (forward and backward bounce)  
  // To display the distance on Serial Monitor  
  lcd.print("Distance: ");  
  lcd.print(distance);  
  lcd.println(" cm"); //specified unit of distance  
  delay(500);
  lcd.clear();
  delay(500);
  sensors_event_t a, g, temp;
	mpu.getEvent(&a, &g, &temp);
  lcd.print("Acceleration = ");
  lcd.println(a.acceleration.x);
  delay(500);
  lcd.clear();
  delay(500);
  if (a.acceleration.x >= 3) {
    digitalWrite(redLED2, HIGH);
    digitalWrite(buzzer, HIGH);
    delay(500);
  }
  else {
    digitalWrite(greenLED1, HIGH);
    digitalWrite(buzzer, HIGH);
    digitalWrite(redLED2, LOW);
    delay(500);

  }
  if (distance <=45){
  digitalWrite(blueLED3, HIGH);  
  digitalWrite(buzzer, HIGH);
  }
  else {
    digitalWrite(blueLED3, LOW);
    digitalWrite(buzzer, LOW);
    digitalWrite(redLED2, LOW);
  }

  Vo = analogRead(ThermistorPin);
  R2 = R1 * (1023.0 / (float)Vo - 1.0);
  logR2 = log(R2);
  T = (1.0 / (c1 + c2*logR2 + c3*logR2*logR2*logR2));
  T = T - 273.15;
 // Tf = (T * 9.0)/ 5.0 + 32.0; 

  lcd.print("Temp:"); 
  //lcd.print(Tf);
  //lcd.print(" F");
  lcd.print(T);
  lcd.print("c");
   delay(500);
   lcd.clear();
  delay(500);
}