Hello, I just got an arduino, and I am trying to follow tutorial (http://www.instructables.com/id/Arduino-Web-LED) to control an RGB led over ethernet. I have gotten this to work perfectly using Yaler, however I would like to migrate away from that. Just as a learning experience I would like to get rid of all of the Yaler stuff and only use a webserver hosted directly from the Arduino, but still have the same look to the page to control the led. I need help getting rid of all of the Yaler stuff. I am pretty new to this, and don’t really understand the code well enough to be able to make major changes like that. The code I have so far is pretty much directly from the tutorial. I have the led and everything hardware wise setup fine, just need help with the code.
Original code:
#include <SPI.h>
#include <Ethernet.h>
const char html[] =
"<html><head>"
"<script type=\"text/javascript\">"
"var r;"
"try {"
"r = new XMLHttpRequest();"
"} catch (e) {"
"try {"
"r = new ActiveXObject('Microsoft.XMLHTTP');"
"} catch (e) {}"
"}"
"function set (c) {"
"r.open('PUT', './led/' + c, false);"
"r.send(null);"
"}"
"</script>"
"<style type=\"text/css\">"
".b {width:112; height:112}"
".g {color:lightgrey}"
"</style>"
"</head>"
"<body><table height=\"100%\" width=\"100%\">"
"<tr><td align=\"center\" valign=\"middle\">"
"<p>"
"<input type=\"button\" class=\"b\" style=\"background-color:#ff0000\" onclick=\"set('ff0000')\"/> "
"<input type=\"button\" class=\"b\" style=\"background-color:#00ff00\" onclick=\"set('00ff00')\"/> "
"<input type=\"button\" class=\"b\" style=\"background-color:#0000ff\" onclick=\"set('0000ff')\"/>"
"</p>"
"<p>HTML served from <a href=\"\">this</a> Arduino, made accessible by <a href=\"http://www.yaler.org/\">Yaler</a>.</p>"
"</td></tr>"
"</table></body></html>";
const char http200[] = "HTTP/1.1 200 OK";
const char contentLength[] = "Content-Length: ";
const char connectionClose[] = "Connection: close";
const char contentTypeTextHtml[] = "Content-Type: text/html";
const char contentTypeTextPlain[] = "Content-Type: text/plain";
const byte RECEIVING = 0, READ_CR = 1, READ_CRLF = 2, READ_CRLFCR = 3, DONE = 4;
const byte YALER_RECEIVING = 0, YALER_UPGRADING = 1, YALER_TIMEOUT = 2, YALER_UPGRADED = 3;
const char yalerId[] = "my-arduino"; // TODO: change
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; // TODO: change
byte server[] = { 46, 137, 106, 125 }; // try.yaler.net
boolean isPut;
byte state;
int count;
byte ledIndex;
byte ledUriOffset;
int htmlLength;
byte yalerState;
int yalerCount;
byte rPin = 5;
byte gPin = 3;
byte bPin = 6;
byte led[] = {0, 0, 0};
void setColor (byte r, byte g, byte b) {
// SparkFun LED
analogWrite(rPin, r);
analogWrite(gPin, g);
analogWrite(bPin, b);
// Adafruit LED
//analogWrite(rPin, 255 - r);
//analogWrite(gPin, 255 - g);
//analogWrite(bPin, 255 - b);
}
byte byteFromHexChar (char ch) {
byte result;
if ((ch >= '0') && (ch <= '9')) {
result = ch - '0';
} else if ((ch >= 'a') && (ch <= 'f')) {
result = 10 + (ch - 'a');
} else if ((ch >= 'A') && (ch <= 'F')) {
result = 10 + (ch - 'A');
} else {
result = 0;
}
return result;
}
void parseRequestChar (char ch) {
// PUT /<yaler-id>/led/ff0000 ... \r\n\r\n
// GET /<yaler-id>/led ... \r\n\r\n
if (count == 0) {
isPut = ch == 'P';
} else if ((count >= ledUriOffset) && (count < ledUriOffset + 6)) {
byte d = byteFromHexChar(ch);
if ((count - ledUriOffset) % 2 == 0) {
led[ledIndex] = d;
} else {
led[ledIndex] = led[ledIndex] * 16 + d;
ledIndex++;
}
}
if (state == RECEIVING) {
if (ch == '\r') {
state = READ_CR;
}
} else if (state == READ_CR) {
// assert ch == '\n'
state = READ_CRLF;
} else if (state == READ_CRLF) {
if (ch == '\r') {
state = READ_CRLFCR;
} else {
state = RECEIVING;
}
} else if (state == READ_CRLFCR) {
// assert ch == '\n'
state = DONE;
}
count++;
}
void parseYalerResponseChar (char ch) {
// HTTP/1.1 101 ... \r\n\r\n
// HTTP/1.1 204 ... \r\n\r\n
if (yalerState == YALER_RECEIVING) {
if (yalerCount == 9) { // sizeof("HTTP/1.1 ?") - 1;
if (ch == '1') { // 101
yalerState = YALER_UPGRADING;
} else { // 204
// assert ch == '2'
yalerState = YALER_TIMEOUT;
}
}
} else if (yalerState == YALER_UPGRADING) {
if (yalerCount == 56) { // sizeof("HTTP/1.1 101 ... \r\n\r\n") - 1
yalerState = YALER_UPGRADED;
}
}
yalerCount++;
}
void sendYalerPostRequest (EthernetClient c) {
c.print("POST /");
c.print(yalerId);
c.println(" HTTP/1.1");
c.println("Upgrade: PTTH/1.0");
c.println("Connection: Upgrade");
c.println("Host: www.yaler.net");
c.print(contentLength);
c.println("0");
c.println();
c.flush();
}
void receiveYalerResponse (EthernetClient c) {
yalerCount = 0;
yalerState = YALER_RECEIVING;
while (c.connected() && (c.available() <= 0)) {} // Yaler sends 101 or 204 in < 30s
while (c.connected() && (c.available() > 0) &&
(yalerState != YALER_UPGRADED) &&
(yalerState != YALER_TIMEOUT))
{
char ch = c.read();
parseYalerResponseChar(ch);
}
}
void sendPutResponse (EthernetClient c) {
c.println(http200);
c.println(contentTypeTextPlain);
c.print(contentLength);
c.println("3");
c.println(connectionClose);
c.println();
c.print("200");
c.flush();
}
void sendGetResponse (EthernetClient c) {
c.println(http200);
c.println(contentTypeTextHtml);
c.print(contentLength);
c.println(htmlLength);
c.println(connectionClose);
c.println();
c.print(html);
c.flush();
}
void receiveRequest (EthernetClient c) {
count = 0;
ledIndex = 0;
state = RECEIVING;
while (c.connected() && (c.available() > 0) && (state != DONE)) {
char ch = c.read();
//Serial.print(ch);
parseRequestChar(ch);
}
}
void setup() {
//Serial.begin(9600);
//Serial.println("setup");
pinMode(rPin, OUTPUT);
pinMode(gPin, OUTPUT);
pinMode(bPin, OUTPUT);
setColor(255, 255, 255);
Ethernet.begin(mac);
htmlLength = sizeof(html) - 1;
ledUriOffset = sizeof("PUT /") + sizeof(yalerId) + sizeof("/led/") - 3 * 1;
setColor(0, 0, 0);
}
void loop() {
EthernetClient client;
client.connect(server, 80);
if (client.connected()) {
//Serial.println("connected");
sendYalerPostRequest(client);
receiveYalerResponse(client);
if (yalerState == YALER_UPGRADED) {
//Serial.println("upgraded");
receiveRequest(client);
if (state == DONE) {
if (isPut) {
setColor(led[0], led[1], led[2]);
sendPutResponse(client);
} else {
sendGetResponse(client);
}
}
} else {
//Serial.println("timeout");
}
client.stop();
}
}
Post exceeds 9500 chars… will post more
