johnlinvc/http_server.ino

## http_server.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
 modified 02 Sept 2015
 by Arturo Guadalupi

 */

#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);
int inputPin=7;  // define ultrasonic signal receiver pin  ECHO to D4
int outputPin=6; // define ultrasonic signal transmitter pin void setup()

void setup() {
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }


  // start the Ethernet connection and the server:
  Ethernet.begin(mac);
  server.begin();
  Serial.print("server is at ");
  Serial.println(Ethernet.localIP());
     pinMode(inputPin, INPUT);
   pinMode(outputPin, OUTPUT);
}

int getDistance(){
  digitalWrite(outputPin, LOW);
  delayMicroseconds(2);
  digitalWrite(outputPin, HIGH); // Pulse for 10μ s to trigger ultrasonic
  delayMicroseconds(10);
  digitalWrite(outputPin, LOW);
  int distance = pulseIn(inputPin, HIGH);  // Read receiver pulse time
  return distance/58;   // Transform pulse time to distance
}
int lastDistance = 60;
int hasPeople = 0;
int distance;
int arePeopleInside(){
    distance = getDistance();
  if(distance < 60 && lastDistance > 60){
    hasPeople = !hasPeople;
  }
    lastDistance = distance;
    return hasPeople;
}

void loop() {
  // listen for incoming clients
  EthernetClient client = server.available();
  int peopleIn = arePeopleInside();

  if(peopleIn){
    Serial.println("Someone inside");
  }else{
    Serial.println("No one inside");
  }
  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("Connection: close");  // the connection will be closed after completion of the response
          client.println("Refresh: 5");  // refresh the page automatically every 5 sec
          client.println();
          client.println("<!DOCTYPE HTML>");
          client.println("<html>");
          // output the value of each analog input pin
//          for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
//            int sensorReading = analogRead(analogChannel);
//            client.print("analog input ");
//            client.print(analogChannel);
//            client.print(" is ");
//            client.print(sensorReading);
//            client.println("<br />");
//          }
          if(peopleIn) {
            client.print("someone inside");
          } else {
            client.print("empty inside");
          }
          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 disconnected");
  }
}
	/*
	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
	modified 02 Sept 2015
	by Arturo Guadalupi

	*/

	#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);
	int inputPin=7; // define ultrasonic signal receiver pin ECHO to D4
	int outputPin=6; // define ultrasonic signal transmitter pin void setup()

	void setup() {
	// Open serial communications and wait for port to open:
	Serial.begin(9600);
	while (!Serial) {
	; // wait for serial port to connect. Needed for native USB port only
	}


	// start the Ethernet connection and the server:
	Ethernet.begin(mac);
	server.begin();
	Serial.print("server is at ");
	Serial.println(Ethernet.localIP());
	pinMode(inputPin, INPUT);
	pinMode(outputPin, OUTPUT);
	}

	int getDistance(){
	digitalWrite(outputPin, LOW);
	delayMicroseconds(2);
	digitalWrite(outputPin, HIGH); // Pulse for 10μ s to trigger ultrasonic
	delayMicroseconds(10);
	digitalWrite(outputPin, LOW);
	int distance = pulseIn(inputPin, HIGH); // Read receiver pulse time
	return distance/58; // Transform pulse time to distance
	}
	int lastDistance = 60;
	int hasPeople = 0;
	int distance;
	int arePeopleInside(){
	distance = getDistance();
	if(distance < 60 && lastDistance > 60){
	hasPeople = !hasPeople;
	}
	lastDistance = distance;
	return hasPeople;
	}

	void loop() {
	// listen for incoming clients
	EthernetClient client = server.available();
	int peopleIn = arePeopleInside();

	if(peopleIn){
	Serial.println("Someone inside");
	}else{
	Serial.println("No one inside");
	}
	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("Connection: close"); // the connection will be closed after completion of the response
	client.println("Refresh: 5"); // refresh the page automatically every 5 sec
	client.println();
	client.println("<!DOCTYPE HTML>");
	client.println("<html>");
	// output the value of each analog input pin
	// for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
	// int sensorReading = analogRead(analogChannel);
	// client.print("analog input ");
	// client.print(analogChannel);
	// client.print(" is ");
	// client.print(sensorReading);
	// client.println("<br />");
	// }
	if(peopleIn) {
	client.print("someone inside");
	} else {
	client.print("empty inside");
	}
	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 disconnected");
	}
	}