I'm sorry that it has taken so long.
Here is a simple example how to control LOW/HIGH status of a pin.
Settings are saved after eatch change and loaded when the progrmam starts.
#include "SPI.h"
#include "Ethernet.h"
#include "SD.h"
#include "aJSON.h"
#include "WebServer.h"
//define range of pins you want to control
#define FROM_PIN 55
#define TO_PIN 58
byte mac[] = { 0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02 };
WebServer webserver("", 80);
aJsonObject* pins;
File file;
void indexCmd(WebServer &server, WebServer::ConnectionType type, char *, bool) {
server.httpSuccess();
if (type != WebServer::HEAD) {
P(helloMsg) =
"<!DOCTYPE html>\n<html lang=\"en\">\n"
"<head>\n"
"\t<meta charset=\"utf-8\">\n"
"\t<title>Pin Toggle</title>\n"
"\t<link href=\"http://www.cs.helsinki.fi/u/ljlukkar/pincontrol/css/style.css\" rel=\"stylesheet\">\n"
"\t<link href=\'http://fonts.googleapis.com/css?family=Open+Sans+Condensed:700,300\' rel=\'stylesheet\' type=\'text/css\'/>\n"
"</head>\n"
"<body>\n"
"<div class=\"container\">\n"
"\t<div id=\"pin-list\">\n"
"\t</div>\n"
"</div>\n"
"<script src=\"http://www.cs.helsinki.fi/u/ljlukkar/pincontrol/js/jquery.min.js\"></script>\n"
"<script src=\"http://www.cs.helsinki.fi/u/ljlukkar/pincontrol/js/lodash.min.js\"></script>\n"
"<script src=\"http://www.cs.helsinki.fi/u/ljlukkar/pincontrol/js/lib/backbone-min.js\"></script>\n"
"<script src=\"http://www.cs.helsinki.fi/u/ljlukkar/pincontrol/js/models/pin.js\"></script>\n"
"<script src=\"http://www.cs.helsinki.fi/u/ljlukkar/pincontrol/js/collections/pins.js\"></script>\n"
"<script src=\"http://www.cs.helsinki.fi/u/ljlukkar/pincontrol/js/views/pins.js\"></script>\n"
"<script src=\"http://www.cs.helsinki.fi/u/ljlukkar/pincontrol/js/views/app.js\"></script>\n"
"<script src=\"http://www.cs.helsinki.fi/u/ljlukkar/pincontrol/js/app.js\"></script>\n</body>\n"
"</html>";
server.printP(helloMsg);
}
}
// this method is performed before the reguest is prosessessed and default responce is generated
// server.setPreventDefault(true); disables the default prosessing and responce once
void switchBeforeResposeCmd(WebServer &server, WebServer::ConnectionType type, char * tail, bool tailComplete,
aJsonObject ** collection, aJsonObject ** model) {
if (type == WebServer::PUT) {
if (model != NULL) {
pinMode(aJson.getObjectItem(*model, "pin")->valueint, (bool) aJson.getObjectItem(*model, "low")->valuebool);
}
}
}
// this method is performed after the responce is sent so it doens't block it anymore
void switchAfterResposeCmd(WebServer::ConnectionType type, aJsonObject ** collection, aJsonObject ** model) {
pinMode(53, OUTPUT);
if (SD.exists("pin.txt")) {
SD.remove("pin.txt");
}
file = SD.open("pin.txt", FILE_WRITE);
aJson.print(&**collection, file);
file.close();
}
void setup() {
Serial.begin(9600);
pinMode(53, OUTPUT);
if (!SD.begin(4)) {
Serial.println("SD initialization failed!");
}
if (SD.exists("pin.txt")) { //load settings file if found
file = SD.open("pin.txt");
pins = aJson.parse(file);
file.close();
aJsonObject* current = pins->child;
while (current) {
pinMode(aJson.getObjectItem(current, "pin")->valueint,
(bool) aJson.getObjectItem(current, "low")->valuebool);
current = current->next;
}
} else { //if not found populate dta
pins = aJson.createArray();
for (int i = FROM_PIN; i < TO_PIN + 1; i++) {
pinMode(i, LOW);
pinMode(i, OUTPUT);
aJsonObject* pin = aJson.createObject();
aJson.addItemToObject(pin, "id", aJson.createItem(i - FROM_PIN + 1));
aJson.addItemToObject(pin, "pin", aJson.createItem(i));
aJson.addItemToObject(pin, "low", aJson.createItem(false));
aJson.addItemToArray(pins, pin);
}
}
//add binding to webserver and set actions
webserver.addJSONBinding("pins", &pins);
webserver.setBeforeRequest("pins", &switchBeforeResposeCmd);
webserver.setAfterRequest("pins", &switchAfterResposeCmd);
webserver.setDefaultCommand(&indexCmd);
Ethernet.begin(mac);
webserver.begin();
for (byte i = 0; i < 4; i++) {
Serial.print(Ethernet.localIP()[i]);
if (i < 3) {
Serial.print('.');
}
}
Serial.println();
}
void loop() {
webserver.processConnection();
}
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