adds mdns support

WiFiManager.cpp

@@ -193,13 +193,26 @@ boolean WiFiManager::autoConnect(char const *apName, char const *apPassword) {
 
   // set hostname before stating
   if((String)_hostname != ""){
+    DEBUG_WM("Setting hostname:",_hostname);
     bool res = true;
     #ifdef ESP8266
       res = WiFi.hostname(_hostname);
+      #ifdef ESP8266MDNS_H
+        DEBUG_WM("Setting MDNS hostname");
+        if(MDNS.begin(_hostname)){
+          MDNS.addService("http", "tcp", 80);
+        }
+      #endif
     #elif defined(ESP32)
       // @note hostname must be set after STA_START
       delay(200); // do not remove, give time for STA_START
       res = WiFi.setHostname(_hostname);
+      #ifdef ESP32MDNS_H
+        DEBUG_WM("Setting MDNS hostname");
+        if(MDNS.begin(_hostname)){
+          MDNS.addService("http", "tcp", 80);
+        }
+      #endif
     #endif
     
     if(!res)DEBUG_WM(F("hostname: set failed!"));
@@ -1990,10 +2003,10 @@ bool WiFiManager::WiFi_enableSTA(bool enable) {
 
 bool WiFiManager::WiFi_eraseConfig(void) {
     #ifdef ESP8266
-      #ifndef FIXERASECONFIG 
+      #ifndef WM_FIXERASECONFIG 
         return ESP.eraseConfig();
-      #else  
-        // erase config BUG polyfill
+      #else
+        // erase config BUG replacement
         // https://github.com/esp8266/Arduino/pull/3635
         const size_t cfgSize = 0x4000;
         size_t cfgAddr = ESP.getFlashChipSize() - cfgSize;

WiFiManager.h

@@ -13,7 +13,9 @@
 #ifndef WiFiManager_h
 #define WiFiManager_h
 
-#define WEBSERVERSHIM // use webserver shim lib
+#define WM_WEBSERVERSHIM // use webserver shim lib
+// #define WM_MDNS       // use MDNS
+// #define WM_FIXERASECONFIG // use erase flash fix
 
 #ifdef ESP8266
 
@@ -23,6 +25,10 @@
     #include <ESP8266WiFi.h>
     #include <ESP8266WebServer.h>
 
+    #ifdef WM_MDNS
+        #include <ESP8266mDNS.h>
+    #endif
+
     #define WIFI_getChipId() ESP.getChipId()
     #define WIFI_AUTH_OPEN   ENC_TYPE_NONE
 
@@ -36,7 +42,7 @@
 
     #ifndef WEBSERVER_H
         #warning "WEBSERVER not implemented in espressif/esp32, see readme notes"
-        #ifdef WEBSERVERSHIM
+        #ifdef WM_WEBSERVERSHIM
             #include <WebServer.h>
         #else
             #include <ESP8266WebServer.h>
@@ -45,6 +51,9 @@
         #endif
     #endif
 
+    #ifdef WM_MDNS
+        #include <ESPmDNS.h>
+    #endif
 #else
 #endif
 
@@ -222,6 +231,7 @@ class WiFiManager
 
     // defaults
     const byte    DNS_PORT                = 53;
+    const byte    HTTP_PORT               = 80;
     String        _apName                 = "no-net";
     String        _apPassword             = "";
     String        _ssid                   = "";