Arduino 具有ESP12E web ip地址的ESP8266没有响应

我有一个控制遥控车的程序。代码可以很好地编译和上传。它还打印出串行监视器中的ip地址。当我在浏览器中键入ip地址时，会出现一个错误，表明无法访问ip地址。下面是我的代码

多谢各位

亚历克斯

//驱动力设定汽车的速度 //可以设置在0和1023之间（尽管如果值太低，汽车可能不会移动）

//driveDirection设置汽车的行驶方向 //如果按下前进按钮时汽车向后移动，则将其更改为低

 uint8_t driveDirection = HIGH;

 uint8_t steerDirection = HIGH;

 const char* ssid = "wifi_username";
 const char* password = "wifi_password";

 ESP8266WebServer server(80);

 void handleRoot() {

  server.send(200, "text/plain", String("Hello from esp8266!"));
 }

 void handleNotFound(){
   String message = "File Not Found\n\n";
   message += "URI: ";
   message += server.uri();
   message += "\nMethod: ";
   message += (server.method() == HTTP_GET)?"GET":"POST";
   message += "\nArguments: ";
   message += server.args();
   message += "\n";
   for (uint8_t i=0; i<server.args(); i++){
     message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
   }
   server.send(404, "text/plain", message);
 }

 void setup(void){

   pinMode(DRIVE_MOTOR_POWER, OUTPUT);     
   pinMode(DRIVE_MOTOR_DIRECTION, OUTPUT);
   pinMode(STEER_MOTOR_POWER, OUTPUT);
   pinMode(STEER_MOTOR_DIRECTION, OUTPUT);

   Serial.begin(115200);
   WiFi.begin(ssid, password);
   Serial.println("");

//steeringPower设置汽车的转弯速度 //可以设置在0和1023之间（同样，如果值太低，汽车可能不会转向）

//steerDirection设置汽车的转向方向 //如果按下向左按钮时汽车向右转向，则将其更改为低

 uint8_t driveDirection = HIGH;

 uint8_t steerDirection = HIGH;

 const char* ssid = "wifi_username";
 const char* password = "wifi_password";

 ESP8266WebServer server(80);

 void handleRoot() {

  server.send(200, "text/plain", String("Hello from esp8266!"));
 }

 void handleNotFound(){
   String message = "File Not Found\n\n";
   message += "URI: ";
   message += server.uri();
   message += "\nMethod: ";
   message += (server.method() == HTTP_GET)?"GET":"POST";
   message += "\nArguments: ";
   message += server.args();
   message += "\n";
   for (uint8_t i=0; i<server.args(); i++){
     message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
   }
   server.send(404, "text/plain", message);
 }

 void setup(void){

   pinMode(DRIVE_MOTOR_POWER, OUTPUT);     
   pinMode(DRIVE_MOTOR_DIRECTION, OUTPUT);
   pinMode(STEER_MOTOR_POWER, OUTPUT);
   pinMode(STEER_MOTOR_DIRECTION, OUTPUT);

   Serial.begin(115200);
   WiFi.begin(ssid, password);
   Serial.println("");

---

您确定已连接到wi-fi吗

这两行看起来不正确：

const char* ssid = "wifi_username";
const char* password = "wifi_password";

应该是：

const char *ssid = "wifi_username";
const char *password = "wifi_password";

---

谢谢你的回复。是的，我确信它是连接的。我可以在我的网络上看到它，它在成功连接后显示其IP地址。如果这不能解决问题。我建议您搜索或在上发布您的问题。昨天发布，没有回复。还有人有什么想法吗？

   while (WiFi.status() != WL_CONNECTED) {
     delay(500);
     Serial.print(".");
   }
   Serial.println("");
   Serial.print("Connected to ");
   Serial.println(ssid);
   Serial.print("IP address: ");
   Serial.println(WiFi.localIP());

   server.on("/", handleRoot);

   server.on("/forward", [](){
     Serial.println("forward");
     analogWrite(DRIVE_MOTOR_POWER, drivePower);
     digitalWrite(DRIVE_MOTOR_DIRECTION, driveDirection);
     server.send(200, "text/plain", "forward");
   });

   server.on("/driveStop", [](){
     Serial.println("driveStop");
     analogWrite(DRIVE_MOTOR_POWER, 0);
     server.send(200, "text/plain", "driveStop");
   });

   server.on("/back", [](){
     Serial.println("back");
     analogWrite(DRIVE_MOTOR_POWER, drivePower);
     digitalWrite(DRIVE_MOTOR_DIRECTION, !driveDirection);
     server.send(200, "text/plain", "back");
   });

   server.on("/right", [](){
     Serial.println("right");
     analogWrite(STEER_MOTOR_POWER, steeringPower);
     digitalWrite(STEER_MOTOR_DIRECTION, steerDirection);
     server.send(200, "text/plain", "right");
   });

   server.on("/left", [](){
     Serial.println("left");
     analogWrite(STEER_MOTOR_POWER, steeringPower);
     digitalWrite(STEER_MOTOR_DIRECTION, !steerDirection);
     server.send(200, "text/plain", "left");
   });

   server.on("/steerStop", [](){
     Serial.println("steerStop");
     analogWrite(STEER_MOTOR_POWER, 0);
     server.send(200, "text/plain", "steerStop");
   });

   server.onNotFound(handleNotFound);

   server.begin();
   Serial.println("HTTP Server Started");
 }

 void loop(void){
   server.handleClient();
 }

const char* ssid = "wifi_username";
const char* password = "wifi_password";

const char *ssid = "wifi_username";
const char *password = "wifi_password";