esp32 http request works only the first time

[ashrafkamel5]

Hardware:

Board: ESP32 Dev Module
Core Installation version: the problem is present with both 1.0.1 and 1.0.2
IDE name: Arduino IDE
Flash Frequency: 80Mhz
Upload Speed: 921600
Computer OS: Windows 8.1

Description:

http requests work fine only the first time
if i want to make any further requests the httpcode respond is always -1
and i have to reconnect to my wifi for every request
using

void disable_wifi(void)
{
  WiFi.disconnect();
  WiFi.mode(WIFI_OFF);
  delay(1);
}

and then connect again as usual

{
  WiFi.mode(WIFI_STA);
  WiFi.begin(wifiName, wifiPass);
  while (WiFi.status() != WL_CONNECTED);
}

only then the httpclient works fine and i get the httpcode 200 and the payload
but
it takes alot of time
need help....

Sketch:

is just simple http get request

WIFI_STATE wifi_http_get(char* host)
{
  int count = 0;
  char data[50];
  WIFI_STATE return_value;
  WiFi.mode(WIFI_STA);
  Serial.print("Connecting to ");
  Serial.println(wifiName);
   
  WiFi.begin(wifiName, wifiPass);
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("Wi-Fi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP()); //You can get IP address assigned to ES

  count = 0;
  
  http.begin(host);

LABEL:
  int httpCode = http.GET(); //Make the request
   Serial.print("httpCode :");
   Serial.println(httpCode);
  if (httpCode > 0)
  { //Check for the returning code

    payload = http.getString();
  }
  else
  {
     Serial.println("Error on HTTP request");
  }
  http.end(); //Free the resources
  Serial.print("payload :");
  Serial.println(payload);
  if (httpCode == 200)
  {
    return_value = W_HTTP_OK;
  }
  else if (httpCode == -1 && count < 2)
  {
    count++;
    delay(500);
    goto LABEL;
  }
  else if(httpCode == -1)
  {
    return_value =  INTERNET_LIMITED;
  }
  else
  {
    return_value = WIFI_CONNECTED_HTTP_ERROR;
  }
  disable_wifi(); 
  return return_value;
}

[ashrafkamel5]

using WiFimulti class instead of WiFi for connection solved the issue

[vt-d-developer]

I faced same situation. After lots of R&Ds I found, Its problem of connection reuse. In httpclient connection reuse is true by default.
I was using python anywhere free account which allows only one thread so no 2 or more connection at a time. But due to connection reuse client keeps connection open. So server does not allow new connection until last connection close or timeout.
The solution is for this problem had to set httpClient.setReuse(false); . Due to this client close connection forcefully and make server to accept new connection. Check if you server is single threaded. Usually most of development servers are single threaded.

[ashrafkamel5]

thanks for your update,@vt-d-developer

[ArnieO]

The solution is for this problem had to set httpClient.setReuse(false);

Does not work for me.