error compiling void printIP(IPAddress, const char*, String&)

[joniyes]

Hi, i have problem with compiling project:

C:\Users\d3el\Documents\Arduino\ESP-sc-gway_wwwServer.ino: In function 'void printIP(IPAddress, const char, String&)': _wwwServer:45:10: error: ambiguous overload for 'operator+=' (operand types are 'String' and 'IPAddress') response+=(IPAddress)ipa[0]; response+=sep; ^ C:\Users\d3el\Documents\Arduino\ESP-sc-gway_wwwServer.ino:45:10: note: candidates are: In file included from C:\Users\d3el\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.0\cores\esp8266/Arduino.h:261:0, from sketch\ESP-sc-gway.ino.cpp:1: C:\Users\d3el\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.0\cores\esp8266/WString.h:120:18: note: String& String::operator+=(const char) String & operator +=(const char cstr) { ^ C:\Users\d3el\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.0\cores\esp8266/WString.h:120:18: note: no known conversion for argument 1 from 'IPAddress' to 'const char'

C:\Users\d3el\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.0\cores\esp8266/WString.h:124:18: note: String& String::operator+=(char) String & operator +=(char c) { ^ C:\Users\d3el\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.0\cores\esp8266/WString.h:128:18: note: String& String::operator+=(unsigned char) String & operator +=(unsigned char num) { ^ C:\Users\d3el\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.0\cores\esp8266/WString.h:132:18: note: String& String::operator+=(int) String & operator +=(int num) { ^ C:\Users\d3el\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.0\cores\esp8266/WString.h:136:18: note: String& String::operator+=(unsigned int) String & operator +=(unsigned int num) { ^ C:\Users\d3el\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.0\cores\esp8266/WString.h:140:18: note: String& String::operator+=(long int) String & operator +=(long num) { ^ C:\Users\d3el\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.0\cores\esp8266/WString.h:144:18: note: String& String::operator+=(long unsigned int) String & operator +=(unsigned long num) { ^ C:\Users\d3el\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.0\cores\esp8266/WString.h:148:18: note: String& String::operator+=(float) String & operator +=(float num) { ^ C:\Users\d3el\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.0\cores\esp8266/WString.h:152:18: note: String& String::operator+=(double) String & operator +=(double num) { ^ C:\Users\d3el\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.0\cores\esp8266/WString.h:156:18: note: String& String::operator+=(const FlashStringHelper*) String & operator += (const FlashStringHelper *str){ ^

i used esp8266 board library version 2.5.0 for NodeMCU 1.0

[refe]

in Arduino IDE , go to Board Managers, search esp , select esp8266 by ESP8266 Community and use version 2.5.0-beta2

[platenspeler]

In _wwwServer.ino the following needs to be changed: // ---------------------------------------------------------------------------- // PRINT IP // Output the 4-byte IP address for easy printing. // As this function is also used by _otaServer.ino do not put in #define // ---------------------------------------------------------------------------- static void printIP(IPAddress ipa, const char sep, String& response) { response+=(String)ipa[0]; response+=sep; response+=(String)ipa[1]; response+=sep; response+=(String)ipa[2]; response+=sep; response+=(String)ipa[3]; }