Arduino: 1.8.0 (Windows 10), Board: "Generic ESP8266 Module, 80 MHz, 40MHz, DIO, 115200, 512K (64K SPIFFS), ck, Disabled, None"

Build options changed, rebuilding all
C:\Users\Jarno\Documents\Arduino\sketch_feb27a\sketch_feb27a.ino: In function 'void setup()':

sketch_feb27a:31: error: no matching function for call to 'ESP8266WiFiClass::begin(const String&, const String&)'

   WiFi.begin(wifiSSID, wifiPassword);

                                    ^

C:\Users\Jarno\Documents\Arduino\sketch_feb27a\sketch_feb27a.ino:31:36: note: candidates are:

In file included from C:\Users\Jarno\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\libraries\ESP8266WiFi\src/ESP8266WiFi.h:34:0,

                 from C:\Users\Jarno\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\libraries\ESP8266mDNS/ESP8266mDNS.h:46,

                 from C:\Users\Jarno\Documents\Arduino\sketch_feb27a\sketch_feb27a.ino:3:

C:\Users\Jarno\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\libraries\ESP8266WiFi\src/ESP8266WiFiSTA.h:38:21: note: wl_status_t ESP8266WiFiSTAClass::begin(const char*, const char*, int32_t, const uint8_t*, bool)

         wl_status_t begin(const char* ssid, const char *passphrase = NULL, int32_t channel = 0, const uint8_t* bssid = NULL, bool connect = true);

                     ^

C:\Users\Jarno\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\libraries\ESP8266WiFi\src/ESP8266WiFiSTA.h:38:21: note:   no known conversion for argument 1 from 'const String' to 'const char*'

In file included from C:\Users\Jarno\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\libraries\ESP8266WiFi\src/ESP8266WiFi.h:34:0,

                 from C:\Users\Jarno\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\libraries\ESP8266mDNS/ESP8266mDNS.h:46,

                 from C:\Users\Jarno\Documents\Arduino\sketch_feb27a\sketch_feb27a.ino:3:

C:\Users\Jarno\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\libraries\ESP8266WiFi\src/ESP8266WiFiSTA.h:39:21: note: wl_status_t ESP8266WiFiSTAClass::begin(char*, char*, int32_t, const uint8_t*, bool)

         wl_status_t begin(char* ssid, char *passphrase = NULL, int32_t channel = 0, const uint8_t* bssid = NULL, bool connect = true);

                     ^

C:\Users\Jarno\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\libraries\ESP8266WiFi\src/ESP8266WiFiSTA.h:39:21: note:   no known conversion for argument 1 from 'const String' to 'char*'

C:\Users\Jarno\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\libraries\ESP8266WiFi\src/ESP8266WiFiSTA.h:40:21: note: wl_status_t ESP8266WiFiSTAClass::begin()

         wl_status_t begin();

                     ^

C:\Users\Jarno\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\libraries\ESP8266WiFi\src/ESP8266WiFiSTA.h:40:21: note:   candidate expects 0 arguments, 2 provided

exit status 1
no matching function for call to 'ESP8266WiFiClass::begin(const String&, const String&)'

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