Hello! I am using Arduino Mega and Ethernet Sheild, and i want to control arduino ports over Ethernet, for example controlling led using web browser.
I know this is very common question, but i am having some doubt.
To connect Arduino with PC we need Cross-Over cable, is it true.???
But i don't have that, lots of straight cable are there with me.
My home setup is as follow:-
So i had connected my Arduino and PC with router using straight cable.
Is it still possible to access the arduino using PC, if yes then how.
The Arduino has a crossover port last I heard, but I haven't checked it. You should be able to use a straight ethernet cable, but it is easier to connect them with a router.
zoomkat has some good stuff about controlling LEDs with html. The forum search function still isn't working so the examples will be harder to find using Google.
Bottom is simple combined client/server code that has simple text buttons to control the arduino pins.
//zoomkat 10-02-14, combined client and server
//simple button GET with iframe code
//for use with IDE 1.0
//open serial monitor and send a g to test client GET and
//see what the arduino client/server receives
//web page buttons make pins high/low
//use the ' in html instead of " to prevent having to escape the "
//address will look like http://192.168.1.102:84 when submited
//for use with W5100 based ethernet shields
#include <SPI.h>
#include <Ethernet.h>
byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //assign arduino mac address
byte ip[] = {192, 168, 1, 102 }; // ip in lan assigned to arduino
byte gateway[] = {192, 168, 1, 1 }; // internet access via router
byte subnet[] = {255, 255, 255, 0 }; //subnet mask
EthernetServer server(84); //server port arduino server will use
EthernetClient client;
char serverName[] = "checkip.dyndns.com"; // (DNS) dyndns web page server
//byte serverName[] = { 208, 104, 2, 86 }; // (IP) zoomkat web page server IP address
String readString; //used by server to capture GET request
//////////////////////
void setup(){
pinMode(5, OUTPUT); //pin selected to control
pinMode(6, OUTPUT); //pin selected to control
pinMode(7, OUTPUT); //pin selected to control
pinMode(8, OUTPUT); //pin selected to control
//pinMode(5, OUTPUT); //pin 5 selected to control
Ethernet.begin(mac,ip,gateway,gateway,subnet);
server.begin();
Serial.begin(9600);
Serial.println(F("server/client 1.0 test 9/02/14")); // keep track of what is loaded
Serial.println(F("Send a g in serial monitor to test client")); // what to do to test client
}
void loop(){
// check for serial input
if (Serial.available() > 0)
{
byte inChar;
inChar = Serial.read();
if(inChar == 'g')
{
sendGET(); // call client sendGET function
}
}
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.print(readString); //print to serial monitor for debuging
//now output HTML data header
if(readString.indexOf('?') >=0) { //don't send new page
client.println(F("HTTP/1.1 204 Zoomkat"));
client.println();
client.println();
}
else {
client.println(F("HTTP/1.1 200 OK")); //send new page on browser request
client.println(F("Content-Type: text/html"));
client.println();
client.println(F("<HTML>"));
client.println(F("<HEAD>"));
client.println(F("<TITLE>Arduino GET test page</TITLE>"));
client.println(F("</HEAD>"));
client.println(F("<BODY>"));
client.println(F("<H1>Zoomkat's simple Arduino 1.0 button</H1>"));
// DIY buttons
client.println(F("Pin5"));
client.println(F("<a href=/?on2 target=inlineframe>ON</a>"));
client.println(F("<a href=/?off3 target=inlineframe>OFF</a>
"));
client.println(F("Pin6"));
client.println(F("<a href=/?on4 target=inlineframe>ON</a>"));
client.println(F("<a href=/?off5 target=inlineframe>OFF</a>
"));
client.println(F("Pin7"));
client.println(F("<a href=/?on6 target=inlineframe>ON</a>"));
client.println(F("<a href=/?off7 target=inlineframe>OFF</a>
"));
client.println(F("Pin8"));
client.println(F("<a href=/?on8 target=inlineframe>ON</a>"));
client.println(F("<a href=/?off9 target=inlineframe>OFF</a>
"));
client.println(F("Pins"));
client.println(F(" <a href=/?off2468 target=inlineframe>ALL ON</a>"));
client.println(F(" <a href=/?off3579 target=inlineframe>ALL OFF</a>"));
client.println(F("<IFRAME name=inlineframe style='display:none'>"));
client.println(F("</IFRAME>"));
client.println(F("</BODY>"));
client.println(F("</HTML>"));
}
delay(1);
//stopping client
client.stop();
///////////////////// control arduino pin
if(readString.indexOf('2') >0)//checks for 2
{
digitalWrite(5, HIGH); // set pin 5 high
Serial.println(F("Led 5 On"));
Serial.println();
}
if(readString.indexOf('3') >0)//checks for 3
{
digitalWrite(5, LOW); // set pin 5 low
Serial.println(F("Led 5 Off"));
Serial.println();
}
if(readString.indexOf('4') >0)//checks for 4
{
digitalWrite(6, HIGH); // set pin 6 high
Serial.println(F("Led 6 On"));
Serial.println();
}
if(readString.indexOf('5') >0)//checks for 5
{
digitalWrite(6, LOW); // set pin 6 low
Serial.println(F("Led 6 Off"));
Serial.println();
}
if(readString.indexOf('6') >0)//checks for 6
{
digitalWrite(7, HIGH); // set pin 7 high
Serial.println(F("Led 7 On"));
Serial.println();
}
if(readString.indexOf('7') >0)//checks for 7
{
digitalWrite(7, LOW); // set pin 7 low
Serial.println(F("Led 7 Off"));
Serial.println();
}
if(readString.indexOf('8') >0)//checks for 8
{
digitalWrite(8, HIGH); // set pin 8 high
Serial.println(F("Led 8 On"));
Serial.println();
}
if(readString.indexOf('9') >0)//checks for 9
{
digitalWrite(8, LOW); // set pin 8 low
Serial.println(F("Led 8 Off"));
Serial.println();
}
//clearing string for next read
readString="";
}
}
}
}
}
//////////////////////////
void sendGET() //client function to send and receive GET data from external server.
{
if (client.connect(serverName, 80)) {
Serial.println(F("connected"));
client.println(F("GET / HTTP/1.1"));
client.println(F("Host: checkip.dyndns.com"));
client.println(F("Connection: close"));
client.println();
}
else {
Serial.println(F("connection failed"));
Serial.println();
}
while(client.connected() && !client.available()) delay(1); //waits for data
while (client.connected() || client.available()) { //connected or data available
char c = client.read(); //gets byte from ethernet buffer
readString += c; //places captured byte in readString
}
//Serial.println();
client.stop(); //stop client
Serial.println(F("client disconnected."));
Serial.println(F("Data from server captured in readString:"));
Serial.println();
Serial.print(readString); //prints readString to serial monitor
Serial.println();
Serial.println(F("End of readString"));
Serial.println(F("=================="));
Serial.println();
readString=""; //clear readString variable
}
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