WiFi' was not declared in this scope

[VikingFoxViking]

Hello dear team,

I have been trying for hours to flash my ESP32 via Arduino ID exactly according to the instructions.
Unfortunately, I always get an error message when checking in Arduino. Unfortunately I don't know what to do.

I hope someone can help me.
Thanks in advance.

c:\Users\Patrick\Documents\Arduino\libraries\EspMQTTClient\src\EspMQTTClient.cpp: In member function 'bool EspMQTTClient::handleWiFi()':
c:\Users\Patrick\Documents\Arduino\libraries\EspMQTTClient\src\EspMQTTClient.cpp:187:5: error: 'WiFi' was not declared in this scope
187 | WiFi.disconnect(true);
| ^~~~
c:\Users\Patrick\Documents\Arduino\libraries\EspMQTTClient\src\EspMQTTClient.cpp:194:27: error: 'WiFi' was not declared in this scope
194 | bool isWifiConnected = (WiFi.status() == WL_CONNECTED);
| ^~~~
c:\Users\Patrick\Documents\Arduino\libraries\EspMQTTClient\src\EspMQTTClient.cpp:194:44: error: 'WL_CONNECTED' was not declared in this scope; did you mean 'MQTT_CONNECTED'?
194 | bool isWifiConnected = (WiFi.status() == WL_CONNECTED);
| ^~~~~~~~~~~~
| MQTT_CONNECTED
c:\Users\Patrick\Documents\Arduino\libraries\EspMQTTClient\src\EspMQTTClient.cpp:215:27: error: 'WL_CONNECT_FAILED' was not declared in this scope; did you mean 'MQTT_CONNECT_FAILED'?
215 | if(WiFi.status() == WL_CONNECT_FAILED || millis() - _lastWifiConnectiomAttemptMillis >= _wifiReconnectionAttemptDelay)
| ^~~~~~~~~~~~~~~~~
| MQTT_CONNECT_FAILED
c:\Users\Patrick\Documents\Arduino\libraries\EspMQTTClient\src\EspMQTTClient.cpp: In member function 'bool EspMQTTClient::handleMQTT()':
c:\Users\Patrick\Documents\Arduino\libraries\EspMQTTClient\src\EspMQTTClient.cpp:325:9: error: 'WiFi' was not declared in this scope
325 | WiFi.disconnect(true);
| ^~~~
c:\Users\Patrick\Documents\Arduino\libraries\EspMQTTClient\src\EspMQTTClient.cpp: In member function 'void EspMQTTClient::onWiFiConnectionEstablished()':
c:\Users\Patrick\Documents\Arduino\libraries\EspMQTTClient\src\EspMQTTClient.cpp:362:75: error: 'WiFi' was not declared in this scope
362 | Serial.printf("WiFi: Connected (%fs), ip : %s \n", millis()/1000.0, WiFi.localIP().toString().c_str());
| ^~~~
c:\Users\Patrick\Documents\Arduino\libraries\EspMQTTClient\src\EspMQTTClient.cpp: In member function 'void EspMQTTClient::onWiFiConnectionLost()':
c:\Users\Patrick\Documents\Arduino\libraries\EspMQTTClient\src\EspMQTTClient.cpp:388:5: error: 'WiFi' was not declared in this scope
388 | WiFi.disconnect(true);
| ^~~~
c:\Users\Patrick\Documents\Arduino\libraries\EspMQTTClient\src\EspMQTTClient.cpp: In member function 'void EspMQTTClient::connectToWifi()':
c:\Users\Patrick\Documents\Arduino\libraries\EspMQTTClient\src\EspMQTTClient.cpp:555:3: error: 'WiFi' was not declared in this scope
555 | WiFi.mode(WIFI_STA);
| ^~~~
c:\Users\Patrick\Documents\Arduino\libraries\EspMQTTClient\src\EspMQTTClient.cpp:555:13: error: 'WIFI_STA' was not declared in this scope; did you mean 'WIFI_IF_STA'?
555 | WiFi.mode(WIFI_STA);
| ^~~~~~~~
| WIFI_IF_STA

exit status 1

Compilation error: exit status 1

[cswinter77]

Hi the issue is with the ESP32MQTT library. See here for the fix...

https://forum.arduino.cc/t/broken-dependencies/1266624