Wifi mode AP pings only few seconds

[psykokwak-com]

Hi all,
I simply use the AP WiFi exemple.
I start a ping on 192.168.4.1 then I connect to the ESP32. The WiFi connection is OK and I receive my pings... But only the first 3 or 4. Then after the ping stops until y disconnect then I reconnect.
The ping test is only for test. I have no connectivity at all (the embedded webserver does not respond).
I tried with my smartphone too. Same.

I Use the latest Arduino version (1.0.2).

No problem in STA mode.

[psykokwak-com]

Considering this code :

#include <WiFi.h>
#include <WiFiClient.h>
#include <WiFiAP.h>
#include <WebServer.h>

WebServer server(80);

void setup() {
  Serial.begin(115200);
  Serial.println();
  Serial.println("Configuring access point...");

  WiFi.softAP("MyAP", "");
  IPAddress myIP = WiFi.softAPIP();
  Serial.print("AP IP address: ");
  Serial.println(myIP);

  server.on("/", []() {
    server.send(200, "text/plain", "OK");
  });

  server.begin();
}

void loop() {
  // ping 192.168.4.1 from my laptop works until I uncomment this
  // line then I try to reach http://192.168.4.1/
  // Then the ping command stops.
  // server.handleClient();
}

With a fresh install, and a "erase_flash" command on the ESP32.
As soon as I try to connect to the webserver using my browser.

Configuring access point...
I (31) wifi: wifi driver task: 3ffb5700, prio:23, stack:3584, core=0
I (71) wifi: wifi firmware version: 6d404d4
I (71) wifi: config NVS flash: disabled
I (74) wifi: config nano formating: disabled
I (79) wifi: Init dynamic tx buffer num: 32
I (82) wifi: Init data frame dynamic rx buffer num: 10
I (87) wifi: Init management frame dynamic rx buffer num: 10
I (93) wifi: Init static rx buffer size: 1600
I (97) wifi: Init static rx buffer num: 8
I (100) wifi: Init dynamic rx buffer num: 10
I (163) wifi: mode : softAP (30:ae:a4:cc:4c:5d)
I (164) wifi: Init max length of beacon: 752/752
I (164) wifi: Init max length of beacon: 752/752
[D][WiFiGeneric.cpp:336] _eventCallback(): Event: 0 - WIFI_READY
[D][WiFiGeneric.cpp:336] _eventCallback(): Event: 13 - AP_START
AP IP address: [D][WiFiGeneric.cpp:336] _eventCallback(): Event: 13 - AP_START
[D][WiFiGeneric.cpp:336] _eventCallback(): Event: 13 - AP_START
1
I (74080) wifi: n:1 0, o:1 0, ap:1 1, sta:255 255, prof:1
I (74080) wifi: station: 44:1c:a8:e3:26:ef join, AID=1, bgn, 20
[D][WiFiGeneric.cpp:336] _eventCallback(): Event: 15 - AP_STACONNECTED
[D][WiFiGeneric.cpp:336] _eventCallback(): Event: 17 - AP_STAIPASSIGNED
[D][WiFiGeneric.cpp:336] _eventCallback(): Event: 17 - AP_STAIPASSIGNED

Is there something I doing wrong ?

[lbernstone]

Put a delay in your loop. 50ms should give the system some time to do other tasks.

[psykokwak-com]

Nothing change!

[lbernstone]

See if the sdkconfig.h changes in b0d8d4d help. You can copy the sdkconfig.h into your sketch folder and edit it there.

[psykokwak-com]

Are you sure that if I put the sdkconfig.h file into my arduino sketch folder, the arduino toolchain will use it to rebuild the binary ?

Edit 1 : Ok, I replaced the file directly in :

C:\Users<username>\AppData\Local\arduino15\packages\esp32\hardware\esp32\1.0.2\tools\sdk\include\config

Seems better : Now it works on my previous minimal test case but not on my real case.

Edit 2 : Using the @me-no-dev Async-Web-Server, it stills freeze with the two sdkconfig.h

#include <WiFi.h>
#include <WiFiClient.h>
#include <WiFiAP.h>
#include <AsyncTCP.h>
#include <ESPAsyncWebServer.h>

AsyncWebServer server(80);

void setup() {
  Serial.begin(115200);
  Serial.println();

  WiFi.softAP("MyAP", "");
  IPAddress myIP = WiFi.softAPIP();
  Serial.print("AP IP address: ");
  Serial.println(myIP);

  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
    request->send(200, "text/plain", "Hello, world");
  });

  server.begin();
}

void loop() {
}

Edit 3 : Using the mongoose webserver library, it works well with the new sdkconfig.h but not with the original one

#include <WiFi.h>
#include <WiFiClient.h>
#include <WiFiAP.h>
#include "mongoose.h"

static void ev_handler(struct mg_connection *nc, int ev, void *p) {
  if (ev == MG_EV_HTTP_REQUEST) {
    // Send Build date
    mg_send_head(nc, 200, -1, "Content-Type: application/json");

    mg_printf_http_chunk(nc, "{\"hwver\":%d,\"date\":\"%s\",\"time\":\"%s\"}", 1, __DATE__, __TIME__);
    mg_send_http_chunk(nc, "", 0); // Send empty chunk, the end of response

    nc->flags |= MG_F_SEND_AND_CLOSE;
  }
}
static const char *s_http_port = "80";
void setup() {
  Serial.begin(115200);
  Serial.println();

  WiFi.softAP("MyAP", "");
  IPAddress myIP = WiFi.softAPIP();
  Serial.print("AP IP address: ");
  Serial.println(myIP);

  struct mg_mgr mgr;
  struct mg_connection *nc;

  mg_mgr_init(&mgr, NULL);
  printf("Starting web server on port %s\n", s_http_port);
  nc = mg_bind(&mgr, s_http_port, ev_handler);
  if (nc == NULL) {
    printf("Failed to create listener\n");
    return ;
  }

  // Set up HTTP server parameters
  mg_set_protocol_http_websocket(nc);

  for (;;) {
    mg_mgr_poll(&mgr, 1000);
  }
  mg_mgr_free(&mgr);
}

void loop() {
}

Edit 4 : Ok, after updating AsyncTCP and AsyncWebServer from github, it works using the latest sdkconfig.h

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