diff --git a/WiFiManager.cpp b/WiFiManager.cpp
index ab9a9b7..2eff646 100644
--- a/WiFiManager.cpp
+++ b/WiFiManager.cpp
@@ -100,7 +100,7 @@ bool WiFiManager::addParameter(WiFiManagerParameter *p) {
   // check param id is valid, unless null
   if(p->getID()){
     for (size_t i = 0; i < strlen(p->getID()); i++){
-       if(!isAlphaNumeric(p->getID()[i])){
+       if(!isAlphaNumeric(p->getID()[i]) && !p->getID()[i]=='_'){
         DEBUG_WM(DEBUG_ERROR,"[ERROR] parameter IDs can only contain alpha numeric chars");
         return false;
        }
diff --git a/examples/OnDemandConfigPortal/OnDemandConfigPortal.ino b/examples/OnDemandConfigPortal/OnDemandConfigPortal.ino
index 6bf5226..e9c8268 100644
--- a/examples/OnDemandConfigPortal/OnDemandConfigPortal.ino
+++ b/examples/OnDemandConfigPortal/OnDemandConfigPortal.ino
@@ -19,6 +19,10 @@ void setup() {
   Serial.println(modes[WiFi.getMode()]);
   WiFi.printDiag(Serial);
 
+  //WiFiManager
+  //Local intialization. Once its business is done, there is no need to keep it around
+  WiFiManager wifiManager;
+
   //Local intialization. Once its business is done, there is no need to keep it around
   //reset settings - for testing
   //wifiManager.resetSettings();
@@ -26,10 +30,50 @@ void setup() {
   //sets timeout until configuration portal gets turned off
   //useful to make it all retry or go to sleep
   //in seconds
-  wifiManager.setConfigPortalTimeout(180);
+  wifiManager.setConfigPortalTimeout(20);
+  wifiManager.setConnectTimeout(10);
+  // wifiManager.setShowStaticFields(true);
+
   // uint8_t menu[] = {wifiManager.MENU_WIFI,wifiManager.MENU_INFO,wifiManager.MENU_PARAM,wifiManager.MENU_CLOSE};
   // wifiManager.setMenu(menu);
 
+  // std::vector<WiFiManager::menu_page_t> menu = {wifiManager.MENU_WIFI,wifiManager.MENU_INFO,wifiManager.MENU_PARAM,wifiManager.MENU_CLOSE,wifiManager.MENU_SEP,wifiManager.MENU_ERASE,wifiManager.MENU_EXIT};
+  // wifiManager.setMenu(menu);
+
+// std::vector<WiFiManager::menu_page_t> menu = {wifiManager.MENU_WIFI,wifiManager.MENU_INFO,wifiManager.MENU_PARAM,wifiManager.MENU_CLOSE,wifiManager.MENU_SEP,wifiManager.MENU_ERASE,wifiManager.MENU_EXIT};
+  // wifiManager.setMenu(menu);
+
+
+  WiFiManagerParameter custom_mqtt_server("server", "mqtt server", "", 40);
+  WiFiManagerParameter custom_mqtt_port("port", "mqtt port", "", 6);
+  WiFiManagerParameter custom_blynk_token("api_token", "api token", "", 0);
+
+  //add all your parameters here
+  wifiManager.addParameter(&custom_mqtt_server);
+  wifiManager.addParameter(&custom_mqtt_port);
+  wifiManager.addParameter(&custom_blynk_token);
+
+        // MENU_WIFI       = 0,
+        // MENU_WIFINOSCAN = 1,
+        // MENU_INFO       = 2,
+        // MENU_PARAM      = 3,
+        // MENU_CLOSE      = 4,
+        // MENU_RESTART    = 5,
+        // MENU_EXIT       = 6,
+        // MENU_ERASE      = 7,
+        // MENU_SEP        = 8
+
+  // const char* menu[] = {"wifi","wifinoscan","info","param","close","sep","erase","restart","exit"};
+  // wifiManager.setMenu(menu,9);
+
+  std::vector<const char *> menu = {"wifi","wifinoscan","info","param","close","sep","erase","restart","exit"};
+  wifiManager.setMenu(menu);
+  
+  //set static ip
+  wifiManager.setSTAStaticIPConfig(IPAddress(10,0,1,99), IPAddress(10,0,1,1), IPAddress(255,255,255,0));
+  // wifiManager.setShowStaticFields(false);
+  // wifiManager.setShowDnsFields(false);
+
   //fetches ssid and pass and tries to connect
   //if it does not connect it starts an access point with the specified name
   //here  "AutoConnectAP"