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unsigned int EchoPin = 2; // The Arduino's the Pin2 connection to US-100 Echo / RX
unsigned int TrigPin = 3; // The Arduino's Pin3 connected to US-100 Trig / TX
unsigned long Time_Echo_us = 0; 
unsigned long Len_mm = 0; 
#define buzzer 6
int sound ;
float temp;
int tempPin = 0;
int buzzer1=8; //Connect the buzz positive Pin to Digital Pin 8 


void setup() { 


//Initialize 
Serial.begin(9600); // The measurement results through the serial output to the serial port on the PC monitor
pinMode(EchoPin, INPUT); // The set EchoPin input mode.
pinMode(TrigPin, OUTPUT);
pinMode(buzzer, OUTPUT); 
pinMode(12, OUTPUT); // The set TrigPin output mode.
pinMode(buzzer1,OUTPUT); //Set Pin Mode as output
Serial.begin(9600);
beep(500);


}




void loop() { 


// By the Trig / Pin sending pulses trigger US-100 ranging
digitalWrite(TrigPin, HIGH); // Send pulses begin by Trig / Pin
delayMicroseconds(50); // Set the pulse width of 50us (> 10us)
digitalWrite(TrigPin, LOW); // The end of the pulse 
Time_Echo_us = pulseIn(EchoPin, HIGH); // A pulse width calculating US-100 returned
if((Time_Echo_us < 60000) && (Time_Echo_us > 1)) { // Pulse effective range (1, 60000).
// Len_mm = (Time_Echo_us * 0.34mm/us) / 2 (mm) 
Len_mm = ((Time_Echo_us*34/100)/2);
if( Len_mm<=1500)
{
sound=100;
analogWrite(buzzer,sound);
digitalWrite(buzzer, HIGH);
digitalWrite(12, HIGH);


}
else
{
sound=0;
//digitalWrite(buzzer, LOW)
digitalWrite(12,LOW );
digitalWrite(buzzer, LOW);
} 
Serial.print("Present Distance is: "); // Output to the serial port monitor 
Serial.print(Len_mm, DEC); // Output to the serial port monitor 
Serial.println("mm"); // Output to the serial port monitor
} 
delay(333); // Per second (1000ms) measured


//digitalWrite(buzzer,LOW);


temp = analogRead(tempPin);
temp = temp * 0.48828125;


if(temp > 31) { beep(50); beep(50); }


Serial.print("TEMPRATURE = ");
Serial.print(temp);
Serial.print(" Celcius");
Serial.println();
delay(1000);
}




void beep(unsigned char delayms){
digitalWrite(buzzer1,HIGH);
delay(delayms); // wait for a delayms ms
digitalWrite(buzzer1,LOW);
delay(delayms); // wait for a delayms ms 
}