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使用以太網WebServer示例代碼，我已經讓我的arduino託管存儲在SD卡上的網站。該網站使用jQuery將網頁瀏覽器中的鼠標位置發回到arduino。我最終想用這個信息來控制一個伺服電機，但是，我遇到的問題是，void loop的每次迭代中的client.stop行會在鼠標移動和arduino獲取之間產生很大的滯後時間信息。以太網網絡服務器示例，client.stop導致延遲時間問題
有沒有辦法讓這段代碼只在鼠標停止移動時使用執行stop.client行。那麼有效的時候，沒有信息通過post方法發送到arduino？
這是我的代碼。
#include <SPI.h>
#include <Ethernet.h>
#include <SD.h>
String POST = "";
int count = 0;
const int chipSelect = 4;
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,178,30);
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);
EthernetClient client;
void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
Serial.setTimeout(10);
//start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
client.setTimeout(1);
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
//SD card stuff
Serial.print("Initializing SD card...");
// see if the card is present and can be initialized:
if (!SD.begin(chipSelect)) {
Serial.println("Card failed, or not present");
// don't do anything more:
return;
}
Serial.println("card initialized.");
}
void loop() {
// listen for incoming clients
EthernetClient client = server.available();
if (client) {
Serial.println("new client");
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the http request has ended,
// so you can send a reply
if (c == '\n' && currentLineIsBlank) {
// send a standard http response header
String POST = "";
while(client.available()){
c = client.read();
// save the variables somewhere
POST += c;
}
if(POST != ""){
Serial.println(POST);
}
//load html/css/js for website only once
if (count <= 0){
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close"); // the connection will be closed after completion of the response
//client.println("Refresh: 5"); // refresh the page automatically every 5 sec
client.println();
File dataFile = SD.open("site.txt");
// if the file is available, write to it:
if (dataFile) {
while (dataFile.available()) {
//Serial.write(dataFile.read());
client.write(dataFile.read());
}
dataFile.close();
}
// if the file isn't open, pop up an error:
else {
Serial.println("error opening site.txt");
}
}
//count = 1;
break;
}
if (c == '\n') {
// you're starting a new line
currentLineIsBlank = true;
}
else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
if (count == 0){
delay(500);
}
else{
delay(1);
}
count=1;
// close the connection:
client.stop();
Serial.println("client disonnected");
}
}