我的Arduino代码遇到了一些问题我制作了一个Arduino以太网SD网络服务器，它的任务是获得一个命令并点亮一个电源开关并显示开关是打开还是关闭一切都很完美。但问题是我可以连接到arduino web服务器几次，然后发生了什么事情，我无法连接到它然后我必须重新启动它才能再次连接到它。任何人都可以帮助我吗？
#include <SPI.h>
#include <Ethernet.h>
#include <SD.h>
#include <RemoteTransmitter.h>
// size of buffer used to capture HTTP requests
#define REQ_BUF_SZ 60
// MAC address from Ethernet shield sticker under board
byte mac[] = { 0x90, 0xA2, 0xDA, 0x0E, 0x95, 0x2F };
IPAddress ip(192, 168, 1, 200); // IP address, may need to change depending on network
EthernetServer server(80); // create a server at port 80
File webFile; // the web page file on the SD card
char HTTP_req[REQ_BUF_SZ] = {0}; // buffered HTTP request stored as null terminated string
char req_index = 0; // index into HTTP_req buffer
boolean LED_state[3] = {0}; // stores the states of the LEDs
ActionTransmitter actionTransmitter(9);
void setup()
{
// Everything resets to Off if arduino is reseted
actionTransmitter.sendSignal(1,'A',false);
actionTransmitter.sendSignal(1,'B',false);
actionTransmitter.sendSignal(1,'C',false);
// disable Ethernet chip
pinMode(10, OUTPUT);
digitalWrite(10, HIGH);
Serial.begin(9600); // for debugging
// initialize SD card
Serial.println("Initializing SD card...");
if (!SD.begin(4)) {
Serial.println("ERROR - SD card initialization failed!");
return; // init failed
}
Serial.println("SUCCESS - SD card initialized.");
// check for index.htm file
if (!SD.exists("index.htm")) {
Serial.println("ERROR - Can't find index.htm file!");
return; // can't find index file
}
Serial.println("SUCCESS - Found index.htm file.");
Ethernet.begin(mac, ip); // initialize Ethernet device
server.begin(); // start to listen for clients
}
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
// limit the size of the stored received HTTP request
// buffer first part of HTTP request in HTTP_req array (string)
// leave last element in array as 0 to null terminate string (REQ_BUF_SZ - 1)
if (req_index < (REQ_BUF_SZ - 1)) {
HTTP_req[req_index] = c; // save HTTP request character
req_index++;
}
// 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");
// remainder of header follows below, depending on if
// web page or XML page is requested
// Ajax request - send XML file
if (StrContains(HTTP_req, "ajax_inputs")) {
// send rest of HTTP header
client.println("Content-Type: text/xml");
client.println("Connection: keep-alive");
client.println();
SetLEDs();
// send XML file containing input states
XML_response(client);
}
else { // web page request
// send rest of HTTP header
client.println("Content-Type: text/html");
client.println("Connection: keep-alive");
client.println();
// send web page
webFile = SD.open("index.htm"); // open web page file
if (webFile) {
while(webFile.available()) {
client.write(webFile.read()); // send web page to client
}
webFile.close();
}
}
// display received HTTP request on serial port
Serial.print(HTTP_req);
// reset buffer index and all buffer elements to 0
req_index = 0;
StrClear(HTTP_req, REQ_BUF_SZ);
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)
}
// checks if received HTTP request is switching on/off LEDs
// also saves the state of the LEDs
void SetLEDs(void)
{
// LED 3 (pin 8)
if (StrContains(HTTP_req, "LED1=1")) {
LED_state[0] = 1; // save LED state
actionTransmitter.sendSignal(1,'A',true);
Serial.print("button 1 on ");
}
else if (StrContains(HTTP_req, "LED1=0")) {
LED_state[0] = 0; // save LED state
actionTransmitter.sendSignal(1,'A',false);
Serial.print("button 1 off");
}
// LED 4 (pin 9)
if (StrContains(HTTP_req, "LED2=1")) {
LED_state[1] = 1; // save LED state
actionTransmitter.sendSignal(1,'B',true);
}
else if (StrContains(HTTP_req, "LED2=0")) {
LED_state[1] = 0; // save LED state
actionTransmitter.sendSignal(1,'B',false);
}
if (StrContains(HTTP_req, "LED3=1")) {
LED_state[2] = 1; // save LED state
actionTransmitter.sendSignal(1,'C',true);
}
else if (StrContains(HTTP_req, "LED3=0")) {
LED_state[2] = 0; // save LED state
actionTransmitter.sendSignal(1,'C',false);
}
}
// send the XML file with analog values, switch status
// and LED status
void XML_response(EthernetClient cl)
{
int analog_val; // stores value read from analog inputs
int count; // used by 'for' loops
cl.print("<?xml version = \"1.0\" ?>");
cl.print("<inputs>");
// button LED states
// LED3
cl.print("<LED>");
if (LED_state[0]) {
cl.print("on");
}
else {
cl.print("off");
}
cl.println("</LED>");
// LED4
cl.print("<LED>");
if (LED_state[1]) {
cl.print("on");
}
else {
cl.print("off");
}
cl.println("</LED>");
// new led
cl.print("<LED>");
if (LED_state[2]) {
cl.print("on");
}
else {
cl.print("off");
}
cl.println("</LED>");
cl.print("</inputs>");
}
// sets every element of str to 0 (clears array)
void StrClear(char *str, char length)
{
for (int i = 0; i < length; i++)
{
str[i] = 0;
}
}
// searches for the string sfind in the string str
// returns 1 if string found
// returns 0 if string not found
char StrContains(char *str, char *sfind)
{
char found = 0;
char index = 0;
char len;
len = strlen(str);
if (strlen(sfind) > len) {
return 0;
}
while (index < len) {
if (str[index] == sfind[found]) {
found++;
if (strlen(sfind) == found) {
return 1;
}
}
else {
found = 0;
}
index++;
}
return 0;
}
答案 0 :(得分：0)
根据您的问题描述...您可能会耗尽内存。当然，这只是一种可能性。尝试使用FreeMemory库来监视内存利用率。如果每次发送命令时内存量都会下降，那么您就得到了答案。
请注意，Arduino草图在耗尽最后一个内存（通常）时会失败。堆栈覆盖了一些数据区域，草图以某种方式变得疯狂。
当然，您需要使用串行监视器运行草图以查看FreeMemory输出。放入一些Serial.print语句也可能有助于确定草图的确切位置
顺便说一句好主意。
答案 1 :(得分：0)
当使用Arduino远程控制电磁阀时，我遇到了类似的问题。我发现问题源于接收HTML请求，而Arduino仍然将其网页传输到客户端。
如果你在请求之间给它几秒钟，看看代码是否仍然挂起;如果是这样，请尝试减少传输的网页，或确保在服务器的回复传输完成之前不会收到任何请求。
答案 2 :(得分：0)
我有类似的问题，我有一个需要每24小时重启的网络服务器。这使它能够稳定地工作超过一年。最近我一直试图摆脱重启解决方案，并可能找到了更好的解决方案。我还看了通常的s，禁用SD卡，空闲内存，dchp内存泄漏，路由器ip租约时间和其他一些。所有这些都证明是红色的鲱鱼并没有提高稳定性。最后我尝试在主循环中包含ethernet.begin和server.begin，它现在已经工作了一个多星期而没有重启。我建议每隔一小时或每天不停地射击这些线。当毫米溢出时，可能会成为一个问题，不能在40天之后发表评论。