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@johnlinvc
Created January 19, 2016 08:53
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/*
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");
}
}
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