add ondemandwebportal example

WiFiManager.cpp

@@ -95,7 +95,6 @@ WiFiManager::WiFiManager() {
 WiFiManager::~WiFiManager() {
   if(_userpersistent) WiFi.persistent(true); // reenable persistent
   WiFi.mode(_usermode);
-  DEBUG_WM(_usermode);
   DEBUG_WM(F("unloading"));
 }
 
@@ -160,6 +159,19 @@ bool WiFiManager::startAP(){
   return ret;
 }
 
+void WiFiManager::startWebPortal() {
+  if(configPortalActive || webPortalActive) return;
+  setupConfigPortal();
+  webPortalActive = true;
+}
+
+void WiFiManager::stopWebPortal() {
+  if(!configPortalActive && !webPortalActive) return;
+  DEBUG_WM("Stopping Web Portal");  
+  webPortalActive = false;
+  stopConfigPortal();
+}
+
 boolean WiFiManager::configPortalHasTimeout(){
     if(_configPortalTimeout == 0 || wifi_softap_get_station_num() > 0){
       _configPortalStart = millis(); // kludge, bump configportal start time to skew timeouts
@@ -194,19 +206,6 @@ void WiFiManager::setupConfigPortal() {
   DEBUG_WM(F("HTTP server started"));
 }
 
-void WiFiManager::startWebPortal() {
-  if(configPortalActive || webPortalActive) return;
-  setupConfigPortal();
-  webPortalActive = true;
-}
-
-void WiFiManager::stopWebPortal() {
-  if(!configPortalActive && !webPortalActive) return;
-  DEBUG_WM("Stopping Web Portal");  
-  webPortalActive = false;
-  stopConfigPortal();
-}
-
 boolean WiFiManager::startConfigPortal() {
   String ssid = "ESP" + String(ESP.getChipId());
   return startConfigPortal(ssid.c_str(), NULL);
@@ -321,7 +320,8 @@ boolean WiFiManager::stopConfigPortal(){
   //HTTP handler
   server->handleClient();
 
-  // @todo does this free memory?
+  // @todo what is the proper way to shutdown and free the server up
+  server->stop();
   server.reset();
   dnsServer.reset();
 

examples/OnDemandWebPortal/OnDemandWebPortal.ino

@@ -0,0 +1,57 @@
+/**
+ * OnDemandWebPortal.ino
+ * example of running the webportal manually, independantly from the captiveportal
+ * trigger pin will start a webportal for 120 seconds then turn it off.
+ * 
+ */
+
+#include <ESP8266WiFi.h>          //https://github.com/esp8266/Arduino
+
+//needed for library
+#include <ESP8266WebServer.h>
+#include <DNSServer.h>
+#include <WiFiManager.h>          //https://github.com/tzapu/WiFiManager
+
+// select which pin will trigger the configuration portal when set to LOW
+// ESP-01 users please note: the only pins available (0 and 2), are shared 
+// with the bootloader, so always set them HIGH at power-up
+#define TRIGGER_PIN 0
+
+// set your ap credentials
+const char *ssid     = "********";
+const char *password = "********";
+
+int timeout          = 120; // seconds
+
+WiFiManager wifiManager;
+
+bool webportalrunning = false;
+int start             = millis();
+
+void setup() {
+  // put your setup code here, to run once:
+  Serial.begin(115200);
+  Serial.println("\n Starting");
+  pinMode(TRIGGER_PIN, INPUT_PULLUP);
+}
+
+
+void loop() {
+  
+  if(webportalrunning){
+    wifiManager.process();
+    if(millis()-start > timeout*1000){
+      Serial.println("webportaltimeout");
+      webportalrunning = false;
+      wifiManager.stopWebPortal(); // auto off
+   }
+  }
+
+  // is configuration portal requested?
+  if ( digitalRead(TRIGGER_PIN) == LOW && !webportalrunning) {
+    wifiManager.startWebPortal();
+    webportalrunning = true;
+    start = millis();
+  }
+  // put your main code here, to run repeatedly:
+}