problem with nodemcu

Using Arduino Microcontrollers
1

hi am trying to send http requests from nodemcu so i started by uploading the esp8266 library but when i run th following code

#include <ESP8266HTTPClient.h>
#include <ESP8266WiFi.h>
 
void setup() {
 
  Serial.begin(115200);                                  //Serial connection
  WiFi.begin("Iphone de elaa", "27343550");   //WiFi connection
 
  while (WiFi.status() != WL_CONNECTED) {  //Wait for the WiFI connection completion
 
    delay(500);
    Serial.println("Waiting for connection");
 
  }
 
}
 
void loop() {
 
 if(WiFi.status()== WL_CONNECTED){   //Check WiFi connection status
 
   HTTPClient http;    //Declare object of class HTTPClient
 
   http.begin("http://localhost:8080/getallcadres/getnbpassage/5");      //Specify request destination
   http.addHeader("Content-Type", "text/plain");  //Specify content-type header
 
   int httpCode = http.POST("5");   //Send the request
   String payload = http.getString();                  //Get the response payload
 
   Serial.println(httpCode);   //Print HTTP return code
   Serial.println(payload);    //Print request response payload
 
   http.end();  //Close connection
 
 }else{
 
    Serial.println("Error in WiFi connection");   
 
 }
 
  delay(30000);  //Send a request every 30 seconds
 
}

i got this error

Arduino: 1.8.9 (Windows Store 1.8.21.0) (Windows 10), Board: "Generic ESP8266 Module, 80 MHz, Flash, Disabled, All SSL ciphers (most compatible), ck, 26 MHz, 40MHz, DOUT (compatible), 512K (no SPIFFS), 2, nonos-sdk 2.2.1 (legacy), v2 Lower Memory, Disabled, None, Only Sketch, 115200"

Build options changed, rebuilding all
In file included from C:\Users\ELA_HIDRI\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.5.2\libraries\ESP8266WiFi\src/WiFiClientSecure.h:41:0,

                 from C:\Users\ELA_HIDRI\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.5.2\libraries\ESP8266WiFi\src/WiFiServerSecure.h:20,

                 from C:\Users\ELA_HIDRI\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.5.2\libraries\ESP8266WiFi\src/ESP8266WiFi.h:41,

                 from C:\Users\ELA_HIDRI\Desktop\PFE_ING\nodemcu\nodemcu.ino:2:

C:\Users\ELA_HIDRI\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.5.2\libraries\ESP8266WiFi\src/WiFiClientSecureBearSSL.h:38:5: error: 'BearSSL::WiFiClientSecure::~WiFiClientSecure()' marked override, but does not override

     ~WiFiClientSecure() override;

     ^

C:\Users\ELA_HIDRI\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.5.2\libraries\ESP8266WiFi\src/WiFiClientSecureBearSSL.h:41:9: error: 'int BearSSL::WiFiClientSecure::connect(const String&, uint16_t)' marked override, but does not override

     int connect(const String& host, uint16_t port) override;

         ^

C:\Users\ELA_HIDRI\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.5.2\libraries\ESP8266WiFi\src/WiFiClientSecureBearSSL.h:46:12: error: 'size_t BearSSL::WiFiClientSecure::write_P(const char*, size_t)' marked override, but does not override

     size_t write_P(PGM_P buf, size_t size) override;

            ^

C:\Users\ELA_HIDRI\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.5.2\libraries\ESP8266WiFi\src/WiFiClientSecureBearSSL.h:58:12: error: 'size_t BearSSL::WiFiClientSecure::peekBytes(uint8_t*, size_t)' marked override, but does not override

     size_t peekBytes(uint8_t *buffer, size_t length) override;

            ^

Multiple libraries were found for "WiFiClient.h"
 Used: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.21.0_x86__mdqgnx93n4wtt\libraries\WiFi
 Not used: C:\Users\ELA_HIDRI\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.5.2\libraries\ESP8266WiFi
exit status 1
Error compiling for board Generic ESP8266 Module.

so what is this error why i am getting it

2

Seems to me that these are functions that you need to implement in your code as it seems that they are trying to be used as events or callbacks.

3

Multiple libraries were found for "WiFiClient.h"
Used: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.21.0_x86__mdqgnx93n4wtt\libraries\WiFi
Not used: C:\Users\ELA_HIDRI\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.5.2\libraries\ESP8266WiFi

I'd look into why the Arduino WiFi client is loading instead of the ESP WiFi Library.

4

As Idahowalker mentioned, the problem is that there are two libraries installed on your computer that contain a file named WiFiClient.h and the Arduino IDE is picking the wrong library. The solution is to force the Arduino IDE to pick the correct library. You can do this by changing the order of your #include directives from:

#include <ESP8266HTTPClient.h>
#include <ESP8266WiFi.h>

to:

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>

The reason this works is because the library you want the IDE to pick (ESP8266WiFi) contains a file named ESP8266WiFi.h, but the library you don't want the IDE to pick (WiFi) does not contain a file of that name. So the #include directive for ESP8266WiFi.h causes the Arduino IDE to add the ESP8266WiFi library's folder to the include search path. Then when it later comes to the ambiguous #include directive for WiFiClient.h in the ESP8266HTTPClient, the correct library that contains WiFiClient.h is already in the include search path so it doesn't need to go looking for all libraries that contain a file named WiFiClient.h on your computer.

5

Is this some code you found somewhere on the Internet? If so, please post a link to it. This is the second report we've had of this issue in the last week. If there is a source where the problematic code is coming from, I would like to see if I can get this fix made there to prevent more people from having the same problem in the future.

I suspect there may have been a recent change in the ESP8266HTTPClient library that made it so code that used to work now has this error, but I haven't investigated.