Adding Static IP Support

README.md

@@ -201,6 +201,13 @@ This will set your captive portal to a specific IP should you need/want such a f
 //set custom ip for portal
 wifiManager.setAPConfig(IPAddress(10,0,1,1), IPAddress(10,0,1,1), IPAddress(255,255,255,0));
 ```
+
+### Custom Static IP Configuration
+This will make use the specified IP configuration instead of using DHCP.
+```
+wifiManager.setStaticIPConfig(IPAddress(192,168,0,99), IPAddress(192,168,0,1), IPAddress(255,255,255,0));
+```
+
 #### Filter Networks
 If you would like to filter low signal quality networks you can tell WiFiManager to not show networks below an arbitrary quality %;
 ```

WiFiManager.cpp

@@ -113,6 +113,12 @@ boolean WiFiManager::autoConnect(char const *apName, char const *apPassword) {
 
   // attempt to connect; should it fail, fall back to AP
   WiFi.mode(WIFI_STA);
+
+  // check if we've got static_ip settings, if we do, use those.
+  if (_static_ip){
+    WiFi.config(_static_ip, _static_gw, _static_sn);
+  }
+
   if (connectWifi(ssid, pass) == WL_CONNECTED)   {
     DEBUG_WM(F("IP Address:"));
     DEBUG_WM(WiFi.localIP());
@@ -266,6 +272,12 @@ void WiFiManager::setAPConfig(IPAddress ip, IPAddress gw, IPAddress sn) {
   _sn = sn;
 }
 
+void WiFiManager::setStaticIPConfig(IPAddress static_ip, IPAddress static_gw, IPAddress static_sn) {
+  _static_ip = static_ip;
+  _static_gw = static_gw;
+  _static_sn = static_sn;
+}
+
 void WiFiManager::setMinimumSignalQuality(int quality) {
   _minimumQuality = quality;
 }

WiFiManager.h

@@ -82,14 +82,14 @@ class WiFiManager
     void          setDebugOutput(boolean debug);
     //defaults to not showing anything under 8% signal quality if called
     void          setMinimumSignalQuality(int quality = 8);
-
     //sets a custom ip /gateway /subnet configuration
     void          setAPConfig(IPAddress ip, IPAddress gw, IPAddress sn);
+    //sets config for a static IP 
+    void          setStaticIPConfig(IPAddress static_ip, IPAddress static_gw, IPAddress static_sn);
     //called when AP mode and config portal is started
     void          setAPCallback( void (*func)(WiFiManager*) );
     //called when settings have been changed and connection was successful
     void          setSaveConfigCallback( void (*func)(void) );
-
     //adds a custom parameter
     void          addParameter(WiFiManagerParameter *p);
 
@@ -114,6 +114,9 @@ class WiFiManager
     IPAddress     _ip;
     IPAddress     _gw;
     IPAddress     _sn;
+    IPAddress     _static_ip;
+    IPAddress     _static_gw;
+    IPAddress     _static_sn;
     int           _paramsCount = 0;
     int           _minimumQuality = -1;