ESP32 webserver not reachable after random number of days #6900

basementmedia2 · 2022-06-23T10:53:39Z

basementmedia2
Jun 23, 2022

Hi,

i have the following Problem

I run an ESP32 in WIFI_STA_AP mode.
After a few days (sometimes 5, sometimes 6) the webserver is not responding anymore.
The ESP is still listed in the WIFI-Network but i can't connect.

Is this a known issue?
By the way: Do i have to set

esp_wifi_set_ps(WIFI_PS_NONE);

or is this set by default?

Goal is, that the webserver is always and always reachable.

Here is a snipped (short part) of my actual code:

#include <WiFi.h>
#include <WiFiAP.h>
#include <WebServer.h>
WebServer server(80);
#include <ESPmDNS.h>

unsigned long connTimer=0;
unsigned long dauer = 5000;
const char ssid[10] = "MySSID";
const char password[7] = "MyPW";
const char apssid[12] = "MyAPSSID";
const char appassword[15] = "MyAPPasswort";
const char host[9] = "myhost";


const char indexPage[] PROGMEM = R"=====(
  <!DOCTYPE html>
  <html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate">
    <meta http-equiv="Pragma" content="no-cache">
    <meta http-equiv="Expires" content="0">
  </head>
    <body>
      Hello World
    </body>
  </html>
)=====";

void setup() {

  Serial.begin(115200);

  xTaskCreatePinnedToCore(
    keepWiFiAlive,
    "Keep Wifi Alive",
    5000,
    NULL,
    2,
    NULL,
    CONFIG_ARDUINO_RUNNING_CORE
  ); 
  

  WiFi.mode(WIFI_AP_STA);
  WiFi.disconnect();
  WiFi.begin(ssid, password);

  
  connTimer = millis();
  while (WiFi.status() != WL_CONNECTED && (millis() - connTimer < dauer)) {
    Serial.print(".");
    delay(500);
  }
  if (WiFi.status() == WL_CONNECTED) {
    Serial.println("Connected...");

    MDNS.begin(host);
  } else {
    Serial.println("Not connected");
  }
  
  WiFi.softAP(apssid, appassword);
  
  server.on("/", display_root);
  server.begin();
  
  MDNS.addService("http", "tcp", 80);
}

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

void display_root() {
  const char * httpType PROGMEM = "text/html";
  server.send_P(200,  httpType, indexPage);
}

void keepWiFiAlive(void * parameters) {
  for (;;) {
     
      if (WiFi.status() == WL_CONNECTED) {
        Serial.println("Still connected!");
        vTaskDelay(10000 / portTICK_PERIOD_MS);
        continue;
      }

      // Not connected --> New connection attempt
      WiFi.begin(ssid, password);
      unsigned long startAttemptTime=millis();
      while (WiFi.status() != WL_CONNECTED && millis() - startAttemptTime < 5000) {
        
      }
      
      if (WiFi.status() != WL_CONNECTED) {
        Serial.println("Not connected...!");
        continue;
      } else {
        MDNS.begin(host); 
        continue;
      }
      
  }
}

I actually use core 1.0.6 cause with 2.0.3 i hav other problems (related to SD library).

Thank you for support.

Best wishes

Daniel

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basementmedia2 Jun 23, 2022

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basementmedia2
Jun 23, 2022