Boas. Já fiz várias pesquisas mas não consegui encontrar o que pretendo.
Tenho o Ethernet Shield com o cartão SD, e o que precisava era de criar 2 ou 3 paginas de internet no cartão, e, usando o Arduino como Web Server, visualizar essas mesmas páginas. Até aqui não hé grande dúvida, pois existem vários exemplos na net.
É possível, a partir de uma página HTML guardada no cartão SD, enviar sinais para o Arduino, para ligar e desligar, por exemplo, uma relay ?
Obrigado
Sim.
http://www.samratamin.com/Ardumote_Tutorial.html
O arduino serve uma página Web para o computador, e ao clicar num link, ou num botão, o browser faz um pedido de página ao Arduino e ele através desse pedido, liga ou desliga o relé.
Vê os links que postei.
Obrigado.
Acho que não consegui explicar muito bem o que pretendo. Eu consigo processar pedidos para o Arduino através de uma página alocada na memória do Arduino. Já encontrei exemplos que o fazem, com este por exemplo:
//simple button GET server code to control servo and arduino pin 5
//for use with IDE 1.0
//open serial monitor to see what the arduino receives
//use the \ slash to escape the " in the html
//for use with W5100 based ethernet shields
//Powering a servo from the arduino usually DOES NOT WORK.
//note that the below bug fix may be required
// http://code.google.com/p/arduino/issues/detail?id=605
#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, 3 }; // ip in lan
byte gateway[] = { 192, 168, 1, 1 }; // internet access via router
byte subnet[] = { 255, 255, 255, 0 }; //subnet mask
EthernetServer server(8080); //server port
String readString;
//////////////////////
void setup(){
pinMode(8, OUTPUT); //pin selected to control
//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"); // so I can keep track of what is loaded
}
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("<meta name='apple-mobile-web-app-capable' content='yes' />");
client.println("<meta name='apple-mobile-web-app-status-bar-style' content='black-translucent' />");
client.println("<link rel='stylesheet' type='text/css' href='http://homeautocss.net84.net/a.css' />");
client.println("<TITLE>Computer Automation</TITLE>");
client.println("</HEAD>");
client.println("<BODY>");
client.println("<H1>Computer Automation</H1>");
client.println("<hr />");
client.println("
");
client.println("<a href=\"/?computer_on\"\">Turn On Computer</a>");
client.println("<a href=\"/?computer_off\"\">Turn Off Computer</a>
");
client.println("</BODY>");
client.println("</HTML>");
delay(1);
//stopping client
client.stop();
///////////////////// control arduino pin
if(readString.indexOf("?computer_on") >0)//checks for on
{
digitalWrite(8, HIGH); // set pin 4 high
Serial.println("Led On");
}
else{
if(readString.indexOf("?computer_off") >0)//checks for off
{
digitalWrite(8, LOW); // set pin 4 low
Serial.println("Led Off");
}
}
//clearing string for next read
readString="";
}
}
}
}
}[/size][/size][/size]
O que pretendia agora, era colocar a página completa no cartão SD. Por exemplo, colocar no cartão um 'index.html', onde tinha um link para uma segunda página, e nessa página ter a possibilidade de accionar a relé.
E exactamente o que é que não sabes fazer?
Postaste um exemplo que faz o que pretendes, se queres que a página saia do cartão SD, escreves isto:
client.println("<HTML>");
client.println("<HEAD>");
client.println("<meta name='apple-mobile-web-app-capable' content='yes' />");
client.println("<meta name='apple-mobile-web-app-status-bar-style' content='black-translucent' />");
client.println("<link rel='stylesheet' type='text/css' href='http://homeautocss.net84.net/a.css' />");
client.println("<TITLE>Computer Automation</TITLE>");
client.println("</HEAD>");
client.println("<BODY>");
client.println("<H1>Computer Automation</H1>");
client.println("<hr />");
client.println("
");
client.println("<a href=\"/?computer_on\"\">Turn On Computer</a>");
client.println("<a href=\"/?computer_off\"\">Turn Off Computer</a>
");
client.println("</BODY>");
client.println("</HTML>");
sem os client.println(), num index.html e usas a biblioteca SD para aceder ao cartão puxar o ficheiro index.html para memória, e responder ao computador que fez o pedido. :\
Pfuiu. Já funciona 
Muito obrigado pela ajuda. Agora é HTML e uma limpeza ao código do arduino.
#include <SPI.h>
#include <SdFat.h>
#include <SdFatUtil.h>
#include <Ethernet.h>
/************ ETHERNET STUFF ************/
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //physical mac address
byte ip[] = { 192, 168, 1, 3 }; // ip in lan
byte gateway[] = { 192, 168, 1, 1 }; // internet access via router
byte subnet[] = { 255, 255, 255, 0 }; //subnet mask
EthernetServer server(8080); //server port
char rootFileName[] = "index.htm";
/************ SDCARD STUFF ************/
Sd2Card card;
SdVolume volume;
SdFile root;
SdFile file;
String readString;
// store error strings in flash to save RAM
#define error(s) error_P(PSTR(s))
void error_P(const char* str) {
PgmPrint("error: ");
SerialPrintln_P(str);
if (card.errorCode()) {
PgmPrint("SD error: ");
Serial.print(card.errorCode(), HEX);
Serial.print(',');
Serial.println(card.errorData(), HEX);
}
while(1);
}
void setup() {
Serial.begin(9600);
PgmPrint("Free RAM: ");
Serial.println(FreeRam());
// initialize the SD card at SPI_HALF_SPEED to avoid bus errors with
// breadboards. use SPI_FULL_SPEED for better performance.
pinMode(10, OUTPUT); // set the SS pin as an output (necessary!)
digitalWrite(10, HIGH); // but turn off the W5100 chip!
pinMode(8, OUTPUT); //pin selected to control
if (!card.init(SPI_HALF_SPEED, 4)) error("card.init failed!");
// initialize a FAT volume
if (!volume.init(&card)) error("vol.init failed!");
PgmPrint("Volume is FAT");
Serial.println(volume.fatType(),DEC);
Serial.println();
if (!root.openRoot(&volume)) error("openRoot failed");
// list file in root with date and size
PgmPrintln("Files found in root:");
root.ls(LS_DATE | LS_SIZE);
Serial.println();
// Recursive list of all directories
PgmPrintln("Files found in all dirs:");
root.ls(LS_R);
Serial.println();
PgmPrintln("Done");
// Debugging complete, we start the server!
Ethernet.begin(mac, ip);
server.begin();
}
// How big our line buffer should be. 100 is plenty!
#define BUFSIZ 100
void loop()
{
char clientline[BUFSIZ];
char *filename;
int index = 0;
int image = 0;
EthernetClient client = server.available();
if (client) {
// an http request ends with a blank line
boolean current_line_is_blank = true;
// reset the input buffer
index = 0;
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 it isn't a new line, add the character to the buffer
//if (c == '\n') {
if (c != '\n' && c != '\r') {
Serial.println(readString); //print to serial monitor for debuging
clientline[index] = c;
index++;
// are we too big for the buffer? start tossing out data
if (index >= BUFSIZ)
index = BUFSIZ -1;
// continue to read more data!
continue;
}
// got a \n or \r new line, which means the string is done
clientline[index] = 0;
filename = 0;
// Print it out for debugging
Serial.println(clientline);
// Look for substring such as a request to get the root file
if (strstr(clientline, "GET / ") != 0) {
filename = rootFileName;
}
if (strstr(clientline, "GET /") != 0) {
// this time no space after the /, so a sub-file
if (!filename) filename = clientline + 5; // look after the "GET /" (5 chars)
// a little trick, look for the " HTTP/1.1" string and
// turn the first character of the substring into a 0 to clear it out.
(strstr(clientline, " HTTP"))[0] = 0;
// print the file we want
Serial.println(filename);
if (! file.open(&root, filename, O_READ)) {
client.println("HTTP/1.1 404 Not Found");
client.println("Content-Type: text/html");
client.println();
client.println("<h2>File Not Found!</h2>");
break;
}
Serial.println("Opened!");
client.println("HTTP/1.1 200 OK");
if (strstr(filename, ".htm") != 0)
client.println("Content-Type: text/html");
else if (strstr(filename, ".css") != 0)
client.println("Content-Type: text/css");
else if (strstr(filename, ".png") != 0)
client.println("Content-Type: image/png");
else if (strstr(filename, ".jpg") != 0)
client.println("Content-Type: image/jpeg");
else if (strstr(filename, ".gif") != 0)
client.println("Content-Type: image/gif");
else if (strstr(filename, ".3gp") != 0)
client.println("Content-Type: video/mpeg");
else if (strstr(filename, ".pdf") != 0)
client.println("Content-Type: application/pdf");
else if (strstr(filename, ".js") != 0)
client.println("Content-Type: application/x-javascript");
else if (strstr(filename, ".xml") != 0)
client.println("Content-Type: application/xml");
else
client.println("Content-Type: text");
client.println();
int16_t c;
while ((c = file.read()) >= 0) {
// uncomment the serial to debug (slow!)
//Serial.print((char)c);
client.print((char)c);
}
file.close();
} else {
// everything else is a 404
client.println("HTTP/1.1 404 Not Found");
client.println("Content-Type: text/html");
client.println();
client.println("<h2>File Not Found!</h2>");
}
break;
}
}
// give the web browser time to receive the data
delay(1);
client.stop();
///////////////////// control arduino pin
if(readString.indexOf("?computer_on") >0)//checks for on
{
digitalWrite(8, HIGH); // set pin 4 high
Serial.println("Led On");
}
else{
if(readString.indexOf("?computer_off") >0)//checks for off
{
digitalWrite(8, LOW); // set pin 4 low
Serial.println("Led Off");
}
}
//clearing string for next read
readString="";
}
}
Como exatamente o código chamará um arquivo .html do cartão SD?
bubulindo:
E exactamente o que é que não sabes fazer?Postaste um exemplo que faz o que pretendes, se queres que a página saia do cartão SD, escreves isto:
client.println("<HTML>");
client.println("");
client.println("");
client.println("");
client.println("");
client.println("Computer Automation");
client.println("");
client.println("");
client.println("
client.println("");
client.println("");
sem os client.println(), num index.html e usas a biblioteca SD para aceder ao cartão puxar o ficheiro index.html para memória, e responder ao computador que fez o pedido. :\
ginatto:
Como exatamente o código chamará um arquivo .html do cartão SD?
Por exemplo, como está feito:
void loop()
{
char clientline[BUFSIZ];
char *filename;
int index = 0;
int image = 0;
EthernetClient client = server.available();
if (client) {
// an http request ends with a blank line
boolean current_line_is_blank = true;
// reset the input buffer
index = 0;
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 it isn't a new line, add the character to the buffer
//if (c == '\n') {
if (c != '\n' && c != '\r') {
Serial.println(readString); //print to serial monitor for debuging
clientline[index] = c;
index++;
// are we too big for the buffer? start tossing out data
if (index >= BUFSIZ)
index = BUFSIZ -1;
// continue to read more data!
continue;
}
// got a \n or \r new line, which means the string is done
clientline[index] = 0;
filename = 0;
// Print it out for debugging
Serial.println(clientline);
// Look for substring such as a request to get the root file
if (strstr(clientline, "GET / ") != 0) {
filename = rootFileName;
}
if (strstr(clientline, "GET /") != 0) {
// this time no space after the /, so a sub-file
if (!filename) filename = clientline + 5; // look after the "GET /" (5 chars)
// a little trick, look for the " HTTP/1.1" string and
// turn the first character of the substring into a 0 to clear it out.
(strstr(clientline, " HTTP"))[0] = 0;
// print the file we want
Serial.println(filename);
if (! file.open(&root, filename, O_READ)) {
client.println("HTTP/1.1 404 Not Found");
client.println("Content-Type: text/html");
client.println();
client.println("<h2>File Not Found!</h2>");
break;
}
Serial.println("Opened!");
client.println("HTTP/1.1 200 OK");
if (strstr(filename, ".htm") != 0)
client.println("Content-Type: text/html");
else if (strstr(filename, ".css") != 0)
client.println("Content-Type: text/css");
else if (strstr(filename, ".png") != 0)
client.println("Content-Type: image/png");
else if (strstr(filename, ".jpg") != 0)
client.println("Content-Type: image/jpeg");
else if (strstr(filename, ".gif") != 0)
client.println("Content-Type: image/gif");
else if (strstr(filename, ".3gp") != 0)
client.println("Content-Type: video/mpeg");
else if (strstr(filename, ".pdf") != 0)
client.println("Content-Type: application/pdf");
else if (strstr(filename, ".js") != 0)
client.println("Content-Type: application/x-javascript");
else if (strstr(filename, ".xml") != 0)
client.println("Content-Type: application/xml");
else
client.println("Content-Type: text");
client.println();
int16_t c;
while ((c = file.read()) >= 0) {
// uncomment the serial to debug (slow!)
//Serial.print((char)c);
client.print((char)c);
}
file.close();
}
else {
// everything else is a 404
client.println("HTTP/1.1 404 Not Found");
client.println("Content-Type: text/html");
client.println();
client.println("<h2>File Not Found!</h2>");
}
break;
}
}
// give the web browser time to receive the data
delay(1);
client.stop();
///////////////////// control arduino pin
if(readString.indexOf("?computer_on") >0)//checks for on
{
digitalWrite(8, HIGH); // set pin 4 high
Serial.println("Led On");
}
else{
if(readString.indexOf("?computer_off") >0)//checks for off
{
digitalWrite(8, LOW); // set pin 4 low
Serial.println("Led Off");
}
}
//clearing string for next read
readString="";
}
}
Olá, tenho uma dúvida quanto a interligação entre o cartão e a página criada. Não consigo fazer "conversar" entre os dois componentes. Você poderia ajudar? Tenho o código feito mas queria passar os botões para um index.htm que seria acessado no cartão.
Código abaixo:
#include <SPI.h>
#include <Ethernet.h>
byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
IPAddress ip(192,168,1,110);
EthernetServer server(80);
void setup() {
Serial.begin(9600);
Ethernet.begin(mac, ip);
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
pinMode(9, OUTPUT);
digitalWrite(9, LOW);
pinMode(8, OUTPUT);
digitalWrite(8, LOW);
pinMode(7, OUTPUT);
digitalWrite(7, LOW);
}
void loop() {
EthernetClient client = server.available();
if (client) {
Serial.println("new client");
boolean currentLineIsBlank = true;
String vars;
int varled1_OnOff = 0;
int varled2_OnOff = 0;
int varled3_OnOff = 0;
while (client.connected()) {
if (client.available()) {
char c = client.read();
Serial.write(c);
vars.concat(c);
if (vars.endsWith("/led1_on")) varled1_OnOff = 1;
if (vars.endsWith("/led1_off")) varled1_OnOff = 2;
if (vars.endsWith("/led2_on")) varled2_OnOff = 1;
if (vars.endsWith("/led2_off")) varled2_OnOff = 2;
if (vars.endsWith("/led3_on")) varled3_OnOff = 1;
if (vars.endsWith("/led3_off")) varled3_OnOff = 2;
if (c == '\n' && currentLineIsBlank) {
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connnection: close");
client.println();
client.println("");
client.println("");
client.println("
");
client.println("
client.println("<input type=button value=Ligar-branca ");
client.println(" onclick="document.location='/led1_on'" />");
client.println("<input type=button value=Desligar ");
client.println(" onclick="document.location='/led1_off'" />");
client.println("
");
client.println("<input type=button value=Ligar-amarela ");
client.println(" onclick="document.location='/led2_on'" />");
client.println("<input type=button value=Desligar ");
client.println(" onclick="document.location='/led2_off'" />");
client.println("
");
client.println("<input type=button value=Ligar-ventilador ");
client.println("onclick="document.location='/led3_on'" />");
client.println("<input type=button value=Desligar ");
client.println(" onclick="document.location='/led3_off'" />");
client.println("
");
if (varled1_OnOff == 1)
{
digitalWrite(9, HIGH);
client.println("Led 1 Ligado");
}
if (varled1_OnOff == 2)
{
digitalWrite(9, LOW);
client.println("Led 1 desligado");
}
if (varled2_OnOff == 1)
{
digitalWrite(8, HIGH);
client.println("Led 2 Ligado");
}
if (varled2_OnOff == 2)
{
digitalWrite(8, LOW);
client.println("Led 2 Desligado");
}
if (varled3_OnOff == 1)
{
digitalWrite(7, HIGH);
client.println("Led 3 Ligado");
}
if (varled3_OnOff == 2)
{
digitalWrite(7, LOW);
client.println("Led 3 Desligado");
}
client.println("");
break;
}
if (c == '\n') {
currentLineIsBlank = true;
}
else if (c != '\r') {
currentLineIsBlank = false;
}
}
}
delay(1);
client.stop();
Serial.println("client disonnected");
}
}
KINGofHS147 o que você quer fazer?
Pela página do SDcard alimentar a página que está no Arduino?
Ou a página do Arduino alimentar a página do SDcard?
Te aconselho a usar JQuery e Ajax! Ajuda bastante.
A página no SDcard faz requisições via AJAX e o Arduino trata essa requisições e retorna em html para alimentar a página do SDcard!
Ola tecdiego, gostaria de alimentar o arduino com a pagina armazenada no cartão. Tentei fazer com AJAX mas ainda não consegui, você poderia me ajudar? Esse é meu e-mail lucassilveira_soares@hotmail.com
Você realmente precisa fazer pela página do sdcard? Não tem como criar uma página que faça isso tudo?
Deixa eu te explicar algumas coisas:
1 - Para se trabalhar com o FORM seria ideal um servido php, porém com o arduino conseguimos trabalhar, a página principal requisita ao Arduino e o mesmo trata essas informações e retorna para a página principal as informações necessárias!
Vou criar um post no meu blog para isso, porém só não prometo que será em breve! Mas farei o possível.
Manda suas dúvidas por aqui, elas podem ser dúvidas de outas pessoas! fico a disposição pelo email fisdiego@gmail.com