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