Fatal error: string: No such file or directory

Projects Programming
1

Currently, I am working on an IoT project that combines Arduino with ModuleSIM7600 to transmit data to the web via WebSocket.
But when using the library
ArduinoWebSockets, a library error occurs that the string library cannot be found in the file ws_common.hpp or memory
in the websockets_endpoint.hpp file. Error as below. I hope everyone can help me soon.

n file included from C:\Users\Kythu\Documents\Arduino\libraries\ArduinoWebsockets\src/tiny_websockets/message.hpp:3:0,
from C:\Users\Kythu\Documents\Arduino\libraries\ArduinoWebsockets\src/ArduinoWebsockets.h:4,
from C:\Users\Kythu\Documents\Arduino\Project\Project.ino:1:
C:\Users\Kythu\Documents\Arduino\libraries\ArduinoWebsockets\src/tiny_websockets/internals/ws_common.hpp:4:10: fatal error: string: No such file or directory
#include
^~~~~~~~
compilation terminated.

exit status 1

Compilation error: exit status 1

2

In my novice eyes, it is strange to see Windows "backslash" mixed with Linux "solidus/slash" in the same command line. Not that this comment brings resolution...

3

Please post your code and a link to where to got that library

4

Try:
String.h (upper case S).

5 
 #include "ArduinoWebsockets.h"
#include <WebSockets.h>
#include <WebSocketsClient.h>
#include <WebSocketsServer.h>

 



WebSocketsClient webSocket;


void setup() {
  // put your setup code here, to run once:
   Serial.begin(115200);       // Khởi tạo kết nối Serial để truyền dữ liệu đến máy tính
 
   connectWebSocket();

   startInternet();

}

void loop() {
  // put your main code here, to run repeatedly:

  
  webSocket.loop();


}


void connectWebSocket() {
  webSocket.begin("", 80, "/");          // Địa chỉ websocket server, port và URL
  webSocket.onEvent(webSocketEvent);

  // webSocket.setAuthorization("user", "password");        // Sử dụng thông tin chứng thực nếu cần

  webSocket.setReconnectInterval(5000);                     // Thử lại sau 5s nếu kết nối không thành công
}


void startInternet() {                  // Kết nối vào mạng Internet
   
}
void webSocketEvent(WStype_t type, uint8_t * payload, size_t length) {
  switch (type) {
    case WStype_DISCONNECTED:                         // Sự kiện khi client ngắt kết nối
      Serial.printf("[WSc] Disconnected!\n");
      connectWebSocket();
      break;

    case WStype_CONNECTED:                            // Sự kiện khi client kết nối
      Serial.printf("[WSc] Connected to url: %s\n", payload);
      webSocket.sendTXT("Connected");          // Thông báo kết nối thành công
      break;

    case WStype_TEXT:                                 // Sự kiện khi nhận được thông điệp dạng TEXT
      Serial.printf("[WSc] get text: %s\n", payload);
      webSocket.sendTXT("Hi Server!");               // Gởi thông điệp đến server
      break;


      //case WStype_BIN:                                  // Sự kiện khi nhận được thông điệp dạng BINARY
      //  Serial.printf("[WSc] get binary length: %u\n", length);
      //  hexdump(payload, length);
      //  // webSocket.sendBIN(payload, length);
      //  break;
  }
}

i taked ArduinoWebsokets.h in Arduino IDE ( Sketch > Include Librari > Manage libraries > ArduinoWebSockets ( by GilMaimon version 0.5.3)

6

now when i changed to < string.h> in file ws_common.hpp and to <memory.h> in file websockets_endpoint.hpp , the problem is still not resolved and i get the following output.

In file included from C:\Users\Kythu\Documents\Arduino\libraries\ArduinoWebsockets\src/tiny_websockets/client.hpp:6:0,
from C:\Users\Kythu\Documents\Arduino\libraries\ArduinoWebsockets\src/ArduinoWebsockets.h:5,
from C:\Users\Kythu\Documents\Arduino\Project\Project.ino:1:
C:\Users\Kythu\Documents\Arduino\libraries\ArduinoWebsockets\src/tiny_websockets/internals/websockets_endpoint.hpp:7:10: fatal error: memory.h: No such file or directory
#include <memory.h>
^~~~~~~~~~
compilation terminated.

exit status 1

Compilation error: exit status 1

7

Which board are you compiling for? It's possible that certain cores don't have the required include files.

8

I use Arduino Uno R3 with ModuleSIM7600E

9

From the github page of ArduinoWebSockets

Prerequisites
Currently (version 0.5.*) the library only works with ESP8266, ESP32 and Teensy 4.1

It does not support the Uno

10

Thanks .
Do you know any solution for using WebSocket with Arduino Uno ? Thanks for your supports.

12

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