ESP32 Forum

Posted: **Thu Nov 17, 2022 5:08 am**

I am relatively new to ESP32 and network programming.

I am running an ESP32S3 chip. I want to be able to scan all packets coming in and then connect to an access point to send a report to a url and then resume scanning.

It is pretty much working but I get this error when going to the access point.

E (762367) esp_netif_lwip: esp_netif_new: Failed to configure netif with config=0x3fce53b4 (config or if_key is NULL or duplicate key)

Below is the code in setup() to initialize the scan.

Code: Untitled.c Select all


nvs_flash_init();

  tcpip_adapter_init();



  esp_event_loop_init(event_handler, NULL);

wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();



  esp_wifi_init(&cfg);

  esp_wifi_set_storage(WIFI_STORAGE_RAM);

  esp_wifi_set_mode(WIFI_MODE_NULL);

  esp_wifi_start();

  esp_wifi_set_promiscuous(true);

  esp_wifi_set_promiscuous_rx_cb(&callback);



  esp_wifi_set_channel(6, WIFI_SECOND_CHAN_NONE);

Everything is working fine. No errors and I am getting the packets.

Now I want to connect to an access point and this is the code I run.

Code: Untitled.c Select all


 printf("Stopping Scanning \r\n");

  esp_err_t errorNumber;

  errorNumber = esp_wifi_stop();

  printf("errorNumber: %x \r\n", (int) errorNumber);

  errorNumber = esp_wifi_disconnect();

  printf("errorNumber: %x \r\n", (int) errorNumber); // Getting error 0x3002

  errorNumber = esp_wifi_deinit();

  printf("errorNumber: %x \r\n", (int) errorNumber);

  esp_netif_init();

  esp_wifi_restore();

  delay(5000);

I do get error 0x3002 when I call esp_wifi_disconnect(). ESP_ERR_WIFI_NOT_STARTED (0x3002): WiFi driver was not started by esp_wifi_start so maybe I need to call something else to stop the driver. Not sure what to call to do this.

I put the delay in just to give things time.

I now connect to the network with this code

Code: Untitled.c Select all


wifiMulti.addAP("NetworkIWantToConnectTo", "password");

delay(5000);

httpUrl = "www.whereIwantToGoTo.com";

So far so good.

Now in the loop() code I have

Code: Untitled.c Select all


if (strlen(httpUrl) > 0)

  {

    int rc = wifiMulti.run(); // This is the line where I am getting the error

    if ((rc == WL_CONNECTED)) {

      printf("wifiMulti is connected \r\n");



      HTTPClient http;

      Serial.print("[HTTP] begin...\n");

      // configure traged server and url

      

      printf("Going out to %s \r\n", httpUrl);

      http.begin(httpUrl);

      Serial.print("[HTTP] GET...\n");

      // start connection and send HTTP header

      int httpCode = http.GET();



      // httpCode will be negative on error



      if (httpCode > 0) {

        // HTTP header has been send and Server response header has been handled

        Serial.printf("[HTTP] GET... code: %d\n", httpCode);

      } else {

        Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());

      }

      httpDataReceived = true;



      strcpy(httpUrl, "");



      http.end();

      stopHttpNetwork();

      //delay(5000);

      initializeScanning();

    }

The code does appear to work as I am going out to the Internet and getting the web page. However, the error is concerning and sometimes it appears the chip does get confused and I have to call stopHttpNetwork() several times as well as initializeScanning()

Code: Untitled.c Select all


void stopHttpNetwork()

{

  esp_wifi_disconnect();

  delay(5000);

  printf("Just disconnected from Internet\r\n");

  return;

}

void initializeScanning()

{

  printf("Initializing Remote ID Scanning \r\n");

  wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();



  esp_wifi_init(&cfg);

  esp_wifi_set_storage(WIFI_STORAGE_RAM);

  esp_wifi_set_mode(WIFI_MODE_NULL);

  esp_wifi_start();

  esp_wifi_set_promiscuous(true);

  esp_wifi_set_promiscuous_rx_cb(&callback);



  esp_wifi_set_channel(6, WIFI_SECOND_CHAN_NONE);



  return;

}

I assume I should be doing something else when I shut down the scanning to free up some memory or resources but I don't know what to call to do it.

Any help would be greatly appreciated.

Thanks

ESP32 Forum

Getting this error "E (762367) esp_netif_lwip: esp_netif_new: Failed to configure netif with config=0x3fce53b4 (config o

Getting this error "E (762367) esp_netif_lwip: esp_netif_new: Failed to configure netif with config=0x3fce53b4 (config o