keshavsaharia · December 19, 2015 17:38
diff --git a/ultra.ino b/ultra.ino
 /*
  Web Server
 
 A simple web server that shows the value of the analog input pins.
 using an Arduino Wiznet Ethernet shield. 
 
 Circuit:
 * Ethernet shield attached to pins 10, 11, 12, 13
 * Analog inputs attached to pins A0 through A5 (optional)
 
 created 18 Dec 2009
 by David A. Mellis
 modified 9 Apr 2012
 by Tom Igoe
 
 */

 #include <SPI.h>
 #include <Ethernet.h>

 // Enter a MAC address and IP address for your controller below.
 // The IP address will be dependent on your local network:
 byte mac[] = { 
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
 IPAddress ip(192,168,1, 177);

 // Initialize the Ethernet server library
 // with the IP address and port you want to use 
 // (port 80 is default for HTTP):
 EthernetServer server(80);

 #define echoPin 7 // Echo Pin
 #define trigPin 8 // Trigger Pin
 #define LEDPin 13 // Onboard LED

 int maximumRange = 200; // Maximum range needed
 int minimumRange = 0; // Minimum range needed
 long duration, distance; // Duration used to calculate distance

 void setup() {
 pinMode(trigPin, OUTPUT);
 pinMode(echoPin, INPUT);
 pinMode(LEDPin, OUTPUT); // Use LED indicator (if required)
 // Open serial communications and wait for port to open:
  Serial.begin(9600);
   while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }


  // start the Ethernet connection and the server:
  Ethernet.begin(mac, ip);
  server.begin();
  Serial.print("server is at ");
  Serial.println(Ethernet.localIP());
 }


 void loop() {
  // listen for incoming clients
  EthernetClient client = server.available();
  if (client) {
    Serial.println("new client");
    // an http request ends with a blank line
    boolean currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        Serial.write(c);
        // if you've gotten to the end of the line (received a newline
        // character) and the line is blank, the http request has ended,
        // so you can send a reply
        if (c == '\n' && currentLineIsBlank) {
          // send a standard http response header
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println("Connnection: close");
          client.println();
          client.println("<!DOCTYPE HTML>");
          client.println("<html>");
                    // add a meta refresh tag, so the browser pulls again every 5 seconds:
          client.println("<meta http-equiv=\"refresh\" content=\"5\">");
          // output the value of each analog input pin
          int sensorReading = ultraDistance();
          if (sensorReading > 80)
          {
          client.println("the distance is way too high!");
          
          client.println(sensorReading);
          }
          else if (sensorReading >=20 && sensorReading <= 80)
          {
          client.println("the distance is just right!");
          
          client.println(sensorReading);
        

          }
          else if (sensorReading < 20)
          {
          client.println("the distance is way too low!");
          
          client.println(sensorReading);  
          }
          client.println("</html>");
          break;
        }
        if (c == '\n') {
          // you're starting a new line
          currentLineIsBlank = true;
        } 
        else if (c != '\r') {
          // you've gotten a character on the current line
          currentLineIsBlank = false;
        }
      }
    }
    // give the web browser time to receive the data
    delay(1);
    // close the connection:
    client.stop();
    Serial.println("client disonnected");
  }
 }




 int ultraDistance()
 {
 /* distance of the nearest object by bouncing soundwaves off of it. */ 
 digitalWrite(trigPin, LOW); 
 delayMicroseconds(2); 

 digitalWrite(trigPin, HIGH);
 delayMicroseconds(10); 
 
 digitalWrite(trigPin, LOW);
 duration = pulseIn(echoPin, HIGH);
 
 //Calculate the distance (in cm) based on the speed of sound.
 distance = duration/58.2;
 
 //Delay 50ms before next reading.
 delay(50);

  return distance;

 }
	/*
	Web Server

	A simple web server that shows the value of the analog input pins.
	using an Arduino Wiznet Ethernet shield.

	Circuit:
	* Ethernet shield attached to pins 10, 11, 12, 13
	* Analog inputs attached to pins A0 through A5 (optional)

	created 18 Dec 2009
	by David A. Mellis
	modified 9 Apr 2012
	by Tom Igoe

	*/

	#include <SPI.h>
	#include <Ethernet.h>

	// Enter a MAC address and IP address for your controller below.
	// The IP address will be dependent on your local network:
	byte mac[] = {
	0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
	IPAddress ip(192,168,1, 177);

	// Initialize the Ethernet server library
	// with the IP address and port you want to use
	// (port 80 is default for HTTP):
	EthernetServer server(80);

	#define echoPin 7 // Echo Pin
	#define trigPin 8 // Trigger Pin
	#define LEDPin 13 // Onboard LED

	int maximumRange = 200; // Maximum range needed
	int minimumRange = 0; // Minimum range needed
	long duration, distance; // Duration used to calculate distance

	void setup() {
	pinMode(trigPin, OUTPUT);
	pinMode(echoPin, INPUT);
	pinMode(LEDPin, OUTPUT); // Use LED indicator (if required)
	// Open serial communications and wait for port to open:
	Serial.begin(9600);
	while (!Serial) {
	; // wait for serial port to connect. Needed for Leonardo only
	}


	// start the Ethernet connection and the server:
	Ethernet.begin(mac, ip);
	server.begin();
	Serial.print("server is at ");
	Serial.println(Ethernet.localIP());
	}


	void loop() {
	// listen for incoming clients
	EthernetClient client = server.available();
	if (client) {
	Serial.println("new client");
	// an http request ends with a blank line
	boolean currentLineIsBlank = true;
	while (client.connected()) {
	if (client.available()) {
	char c = client.read();
	Serial.write(c);
	// if you've gotten to the end of the line (received a newline
	// character) and the line is blank, the http request has ended,
	// so you can send a reply
	if (c == '\n' && currentLineIsBlank) {
	// send a standard http response header
	client.println("HTTP/1.1 200 OK");
	client.println("Content-Type: text/html");
	client.println("Connnection: close");
	client.println();
	client.println("<!DOCTYPE HTML>");
	client.println("<html>");
	// add a meta refresh tag, so the browser pulls again every 5 seconds:
	client.println("<meta http-equiv=\"refresh\" content=\"5\">");
	// output the value of each analog input pin
	int sensorReading = ultraDistance();
	if (sensorReading > 80)
	{
	client.println("the distance is way too high!");

	client.println(sensorReading);
	}
	else if (sensorReading >=20 && sensorReading <= 80)
	{
	client.println("the distance is just right!");

	client.println(sensorReading);


	}
	else if (sensorReading < 20)
	{
	client.println("the distance is way too low!");

	client.println(sensorReading);
	}
	client.println("</html>");
	break;
	}
	if (c == '\n') {
	// you're starting a new line
	currentLineIsBlank = true;
	}
	else if (c != '\r') {
	// you've gotten a character on the current line
	currentLineIsBlank = false;
	}
	}
	}
	// give the web browser time to receive the data
	delay(1);
	// close the connection:
	client.stop();
	Serial.println("client disonnected");
	}
	}




	int ultraDistance()
	{
	/* distance of the nearest object by bouncing soundwaves off of it. */
	digitalWrite(trigPin, LOW);
	delayMicroseconds(2);

	digitalWrite(trigPin, HIGH);
	delayMicroseconds(10);

	digitalWrite(trigPin, LOW);
	duration = pulseIn(echoPin, HIGH);

	//Calculate the distance (in cm) based on the speed of sound.
	distance = duration/58.2;

	//Delay 50ms before next reading.
	delay(50);

	return distance;

	}