I've got an Arduino Uno and Ethernet shield, trying to test it out with a simple on off switch for the on-board LED.
My Code is this
// FILENAME = LED2.ino
// SOURCE= http://www.instructables.com/id/Control-an-LED-over-the-internet-using-the-Arduino/
// Control an LED over the internet using the Arduino Ethernet Shield and Transistor
// http://www.instructables.com/id/Control-an-LED-over-the-internet-using-the-Arduino/
// code SOURCE= http://pastebin.com/CZ6J62qJ
#include <SPI.h>
#include <Ethernet.h>
#include <Servo.h>
Servo myservo; // create servo object to control a servo
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //physical mac address
byte ip[] = { 192, 168, 1, 177 }; // fixed IP addr in LAN
byte gateway[] = { 192, 168, 1, 1 }; // internet access via router
byte subnet[] = { 255, 255, 255, 0 }; //subnet mask
EthernetServer server(80); //server port
String readString;
//////////////////////
void setup()
{
pinMode(6, OUTPUT); //pin selected to control LED
pinMode(13, OUTPUT);
//start Ethernet
Ethernet.begin(mac, ip, gateway, subnet);
server.begin();
//the pin for the servo co
//enable serial data print
Serial.begin(9600);
Serial.println("server LED test 1.0 ---- FILENAME = LED2.ino "); // so I can keep track
}
void loop()
{
// Create a client connection
EthernetClient client = server.available();
if (client) {
while (client.connected()) {
if (client.available()) {
char c = client.read();
//read char by char HTTP request
if (readString.length() < 100) {
//store characters to string
readString += c;
//Serial.print(c);
}
//if HTTP request has ended
if (c == '\n') {
///////////////
Serial.println(readString); //print to serial monitor for debuging
client.println("HTTP/1.1 200 OK"); //send new page
client.println("Content-Type: text/html");
client.println();
client.println("<HTML>");
client.println("<HEAD>");
client.println("<TITLE>Home Automation</TITLE>");
client.println("</HEAD>");
client.println("<BODY bgcolor='aqua'>");
client.println("<H1>Home Automation</H1>");
client.println("<hr />");
client.println("<br />");
client.println("<a href=\"/?lighton\"\">Turn On Light</a>");
client.println("<a href=\"/?lightoff\"\">Turn Off Light</a><br />");
client.println("</BODY>");
client.println("</HTML>");
delay(1);
//stopping client
client.stop();
///////////////////// control arduino pin
if (readString.indexOf("?lighton") > 0) //checks for on
{
digitalWrite(13, HIGH); // set pin 6 high
Serial.println("LED On");
}
else {
if (readString.indexOf("?lightoff") > 0) //checks for off
{
digitalWrite(13, LOW); // set pin 6 low
Serial.println("LED Off");
}
}
readString = ""; //clearing string for next read
}
}
}
}
}
The problem is that when I click a button (either on or off) the LED will blink twice, and then remain off.
My serial monitor also shows 2 HTTP requests, I'm not sure if this is usual or not?
server LED test 1.0 ---- FILENAME = LED2.ino
GET /?lighton HTTP/1.1
LED On
GET /favicon.ico HTTP/1.1
GET /?lighton HTTP/1.1
LED On
GET /?lighton HTTP/1.1
LED On
GET /favicon.ico HTTP/1.1
GET /?lighton HTTP/1.1
LED On
GET /favicon.ico HTTP/1.1
GET /?lightoff HTTP/1.1
LED Off
GET /favicon.ico HTTP/1.1
Would appreciate any help!
readStringvariable. – user31481 Aug 6 '17 at 9:11