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

[VintageSlots]

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.

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1. nvs_flash_init();
2.   tcpip_adapter_init();
3.  
4.   esp_event_loop_init(event_handler, NULL);
5. wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
6.  
7.   esp_wifi_init(&cfg);
8.   esp_wifi_set_storage(WIFI_STORAGE_RAM);
9.   esp_wifi_set_mode(WIFI_MODE_NULL);
10.   esp_wifi_start();
11.   esp_wifi_set_promiscuous(true);
12.   esp_wifi_set_promiscuous_rx_cb(&callback);
13.  
14.   esp_wifi_set_channel(6, WIFI_SECOND_CHAN_NONE);
15.  

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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.

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1.  printf("Stopping Scanning \r\n");
2.   esp_err_t errorNumber;
3.   errorNumber = esp_wifi_stop();
4.   printf("errorNumber: %x \r\n", (int) errorNumber);
5.   errorNumber = esp_wifi_disconnect();
6.   printf("errorNumber: %x \r\n", (int) errorNumber); // Getting error 0x3002
7.   errorNumber = esp_wifi_deinit();
8.   printf("errorNumber: %x \r\n", (int) errorNumber);
9.   esp_netif_init();
10.   esp_wifi_restore();
11.   delay(5000);

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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: [Select all] [Expand/Collapse]

1. wifiMulti.addAP("NetworkIWantToConnectTo", "password");
2. delay(5000);
3. httpUrl = "www.whereIwantToGoTo.com";

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So far so good.

Now in the loop() code I have

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1. if (strlen(httpUrl) > 0)
2.   {
3.     int rc = wifiMulti.run(); // This is the line where I am getting the error
4.     if ((rc == WL_CONNECTED)) {
5.       printf("wifiMulti is connected \r\n");
6.  
7.       HTTPClient http;
8.       Serial.print("[HTTP] begin...\n");
9.       // configure traged server and url
10.      
11.       printf("Going out to %s \r\n", httpUrl);
12.       http.begin(httpUrl);
13.       Serial.print("[HTTP] GET...\n");
14.       // start connection and send HTTP header
15.       int httpCode = http.GET();
16.  
17.       // httpCode will be negative on error
18.  
19.       if (httpCode > 0) {
20.         // HTTP header has been send and Server response header has been handled
21.         Serial.printf("[HTTP] GET... code: %d\n", httpCode);
22.       } else {
23.         Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
24.       }
25.       httpDataReceived = true;
26.  
27.       strcpy(httpUrl, "");
28.  
29.       http.end();
30.       stopHttpNetwork();
31.       //delay(5000);
32.       initializeScanning();
33.     }

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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: [Select all] [Expand/Collapse]

1. void stopHttpNetwork()
2. {
3.   esp_wifi_disconnect();
4.   delay(5000);
5.   printf("Just disconnected from Internet\r\n");
6.   return;
7. }
8. void initializeScanning()
9. {
10.   printf("Initializing Remote ID Scanning \r\n");
11.   wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
12.  
13.   esp_wifi_init(&cfg);
14.   esp_wifi_set_storage(WIFI_STORAGE_RAM);
15.   esp_wifi_set_mode(WIFI_MODE_NULL);
16.   esp_wifi_start();
17.   esp_wifi_set_promiscuous(true);
18.   esp_wifi_set_promiscuous_rx_cb(&callback);
19.  
20.   esp_wifi_set_channel(6, WIFI_SECOND_CHAN_NONE);
21.  
22.   return;
23. }

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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