fix esp32 erase flash

WiFiManager.cpp

@@ -1561,8 +1561,8 @@ bool WiFiManager::WiFi_eraseConfig(void) {
       //     }
       // }
       // return true;
-    #else
-      // @todo
+    #elif defined(ESP32)
+      return WiFi.disconnect(true);
     #endif
 }
 

examples/OnDemandConfigPortal/OnDemandConfigPortal.ino

@@ -26,6 +26,24 @@ void setup() {
   Serial.println(modes[WiFi.getMode()]);
   WiFi.printDiag(Serial);
 
+  //Local intialization. Once its business is done, there is no need to keep it around
+  WiFiManager wifiManager;
+  //reset settings - for testing
+  //wifiManager.resetSettings();
+
+  //sets timeout until configuration portal gets turned off
+  //useful to make it all retry or go to sleep
+  //in seconds
+  wifiManager.setConfigPortalTimeout(180);
+  
+  //fetches ssid and pass and tries to connect
+  //if it does not connect it starts an access point with the specified name
+  //here  "AutoConnectAP"
+  //and goes into a blocking loop awaiting configuration
+  if(!wifiManager.autoConnect("AutoConnectAP")) {
+    Serial.println("failed to connect and hit timeout");
+  } 
+
   pinMode(TRIGGER_PIN, INPUT);
 }