Beste, ik hoop dat jullie kunnen helpen met het volgende,
ik wil via een voorbeeld programma een led aan en uit sturen via mijn ethernet2 shield,
bij het laden vd pagina kan ik deze led aanzetten maar als ik daarna wil uitvinken dan
herlaad de pagina en word het vakje automatisch terug aangevinkt, iemand een idee hoe
ik dit kan verhelpen ? dus bij aanvinken led aan uitvinken led uit ?
Alvast bedankt
#include <SPI.h>
#include <Ethernet2.h>
// MAC address from Ethernet shield sticker under board
byte mac[] = { 0x90, 0xA2, 0xDA, 0x10, 0xB4, 0x00 };
IPAddress DnsServer (192, 168, 1, 6);
IPAddress GateWay (192, 168, 1, 1);
IPAddress SubNetMask(255, 255, 255, 0);
IPAddress ip(10, 33, 211, 179); // IP address, may need to change depending on network
EthernetServer server(80); // create a server at port 80
String HTTP_req; // stores the HTTP request
boolean LED_status = 0; // state of LED, off by default
void setup()
{
Ethernet.begin(mac, ip, DnsServer, GateWay, SubNetMask); // initialize Ethernet device
server.begin(); // start to listen for clients
Serial.begin(9600); // for diagnostics
pinMode(2, OUTPUT); // LED on pin 2
}
void loop()
{
EthernetClient client = server.available(); // try to get client
if (client) { // got client?
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) { // client data available to read
char c = client.read(); // read 1 byte (character) from client
HTTP_req += c; // save the HTTP request 1 char at a time
// last line of client request is blank and ends with \n
// respond to client only after last line received
if (c == '\n' && currentLineIsBlank) {
// send a standard http response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close");
client.println();
// send web page
client.println("<!DOCTYPE html>");
client.println("<html>");
client.println("<head>");
client.println("<title>Arduino LED Control</title>");
client.println("</head>");
client.println("<body>");
client.println("<h1>LED</h1>");
client.println("<p>Click to switch LED on and off.</p>");
client.println("<form method=\"get\">");
ProcessCheckbox(client);
client.println("</form>");
client.println("</body>");
client.println("</html>");
Serial.print(HTTP_req);
HTTP_req = ""; // finished with request, empty string
break;
}
// every line of text received from the client ends with \r\n
if (c == '\n') {
// last character on line of received text
// starting new line with next character read
currentLineIsBlank = true;
}
else if (c != '\r') {
// a text character was received from client
currentLineIsBlank = false;
}
} // end if (client.available())
} // end while (client.connected())
delay(1); // give the web browser time to receive the data
client.stop(); // close the connection
} // end if (client)
}
// switch LED and send back HTML for LED checkbox
void ProcessCheckbox(EthernetClient cl)
{
if (HTTP_req.indexOf("LED2=2") > -1) { // see if checkbox was clicked
// the checkbox was clicked, toggle the LED
if (LED_status) {
LED_status = 0;
}
else {
LED_status = 1;
}
}
if (LED_status) { // switch LED on
digitalWrite(2, HIGH);
// checkbox is checked
cl.println("<input type=\"checkbox\" name=\"LED2\" value=\"2\" \
onclick=\"submit();\" checked>LED2");
}
else { // switch LED off
digitalWrite(2, LOW);
// checkbox is unchecked
cl.println("<input type=\"checkbox\" name=\"LED2\" value=\"2\" \
onclick=\"submit();\">LED2");
}
}
ik zie toch eigenlijk de fout niet waarom na het aanvinken de knop steeds aangevinkt