Error when reinitializing WiFi after deinitialization with WiFi.mode( WIFI_MODE_NULL )

[GiovanniCmpaner]

Previous issue: 4421
Even after fix 80e9e42, I'm still getting:

[ 10769][V][WiFiGeneric.cpp:315] _arduino_event_cb(): AP Started
...
[ 10800][E][WiFiGeneric.cpp:983] mode(): Could not set mode! 12289

This line:

arduino-esp32/libraries/WiFi/src/WiFiGeneric.cpp

Line 568 in beedeea

lowLevelInitDone = esp_wifi_deinit() == ESP_OK;

Should logically be:
lowLevelInitDone = not (esp_wifi_deinit() == ESP_OK);

As if deinit is successful, init flag should be false and not true.

[cardtap]

Hi @GiovanniCmpaner,
Did you ever solve this problem? I am facing the same issue of
[E][WiFiGeneric.cpp:983] mode(): Could not set mode! 12289
When switching from WPA2 standard network to WPA2 enterprise network...

Thanks!

[GiovanniCmpaner]

As I indicated on the first post, you need to modify the mentioned line locally on your source code.
The downside is, whenever you update or sync the framework libraries, you will have to modify it again.

[stale]

[STALE_SET] This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs. Thank you for your contributions.

[stale]

[STALE_DEL] This stale issue has been automatically closed. Thank you for your contributions.

[garageeks]

The issue appears to be present in version 2.0.0RC1.
This is an extract of my wi-fi initialization code (yeah needs some cleanup):

void loop () {
	if(WiFi.status() != WL_CONNECTED || httpFailedCount > 5) enableWiFi();
}

void enableWiFi () {

		if(httpFailedCount > 5) {
			
			Serial.println("Too many failed transmission, restart Wi-Fi");
			wifiResetCounter++;
			WiFi.mode(WIFI_OFF); 
			delay(2000);
		}


		Serial.print("Connecting to AP...");

		int wait_time = 0;
			
		delay(1);
		WiFi.mode(WIFI_STA);
		if(routerIsRebooting || httpFailedCount > 5) {
			if(routerIsRebooting) routerIsRebooting = false;
			WiFi.begin(ssid, password);
			delay(150);
			char devicename[20]="Station-";
			char tempValue[5];
			itoa(stationID,tempValue,10);
			strcat(devicename, tempValue);
			WiFi.setHostname(devicename);
		} else {
			WiFi.reconnect();
		}  
		delay(500);

		while (WiFi.status() != WL_CONNECTED) {
			delay(500);
			Serial.print(".");
			if(wait_time > 10) break;
			wait_time++;
		}

		if(WiFi.status() == WL_CONNECTED) {     //WiFi AP is available, go ahead
			Serial.println("succeeded");

		} else {                                //WiFi not available, increment failed counter
			Serial.println("failed");
			httpFailedCount++;
			WiFi.mode(WIFI_OFF);            //switch it off since it didn't connect. Will try again later   
		}
	}	
}  

I get these errors:

Connecting to AP...............failed
Connecting to AP...[152878][E][WiFiGeneric.cpp:996] mode(): Could not set mode! 12289
............failed
Connecting to AP...[183923][E][WiFiGeneric.cpp:996] mode(): Could not set mode! 12289
............failed
Connecting to AP...[213842][E][WiFiGeneric.cpp:996] mode(): Could not set mode! 12289
............failed
Connecting to AP...[244885][E][WiFiGeneric.cpp:996] mode(): Could not set mode! 12289
............failed
Connecting to AP...[274802][E][WiFiGeneric.cpp:996] mode(): Could not set mode! 12289
............failed
Too many failed transmission, restart Wi-Fi
Connecting to AP...[307855][E][WiFiGeneric.cpp:996] mode(): Could not set mode! 12289
[307855][E][WiFiGeneric.cpp:996] mode(): Could not set mode! 12289
[307856][E][WiFiSTA.cpp:162] begin(): STA enable failed!
............failed
Too many failed transmission, restart Wi-Fi
Connecting to AP...[337805][E][WiFiGeneric.cpp:996] mode(): Could not set mode! 12289
[337805][E][WiFiGeneric.cpp:996] mode(): Could not set mode! 12289
[337806][E][WiFiSTA.cpp:162] begin(): STA enable failed!
............failed
Too many failed transmission, restart Wi-Fi
Connecting to AP...[368891][E][WiFiGeneric.cpp:996] mode(): Could not set mode! 12289
[368891][E][WiFiGeneric.cpp:996] mode(): Could not set mode! 12289
[368892][E][WiFiSTA.cpp:162] begin(): STA enable failed!
............failed

With the change suggested by OP in WiFiGeneric.cpp, line 580, it just works with no errors

static bool wifiLowLevelDeinit(){
    if(lowLevelInitDone){
    	lowLevelInitDone = not(esp_wifi_deinit() == ESP_OK);		//changed according to https://github.com/espressif/arduino-esp32/issues/4842
    }
    return true;
}

I recommend to have a look at this issue as it is breaking older code, and if required, reopen the issue.
Thank you
Nick