Defer wifi disconnection from web interface to allow request to return

code/espurna/mqtt.ino

@@ -94,7 +94,7 @@ void _mqttOnConnect(bool sessionPresent) {
 
 void _mqttOnDisconnect(AsyncMqttClientDisconnectReason reason) {
 
-    DEBUG_MSG("[MQTT] Disconnected!\n");
+    DEBUG_MSG("[MQTT] Disconnected\n");
 
     // Send disconnect event to subscribers
     for (unsigned char i = 0; i < _mqtt_callbacks.size(); i++) {

code/espurna/web.ino

@@ -14,6 +14,7 @@ Copyright (C) 2016-2017 by Xose Pérez <xose dot perez at gmail dot com>
 #include <Hash.h>
 #include <AsyncJson.h>
 #include <ArduinoJson.h>
+#include <Ticker.h>
 
 AsyncWebServer server(80);
 AsyncWebSocket ws("/ws");
@@ -24,6 +25,7 @@ typedef struct {
 } ws_ticket_t;
 
 ws_ticket_t _ticket[WS_BUFFER_SIZE];
+Ticker deferred;
 
 // -----------------------------------------------------------------------------
 // WEBSOCKETS
@@ -75,7 +77,12 @@ void _wsParse(uint32_t client_id, uint8_t * payload, size_t length) {
         DEBUG_MSG("[WEBSOCKET] Requested action: %s\n", action.c_str());
 
         if (action.equals("reset")) ESP.reset();
-        if (action.equals("reconnect")) wifiDisconnect();
+        if (action.equals("reconnect")) {
+
+            // Let the HTTP request return and disconnect after 100ms
+            deferred.once_ms(100, wifiDisconnect);
+            
+        }
         if (action.equals("on")) relayStatus(relayID, true);
         if (action.equals("off")) relayStatus(relayID, false);
 

code/espurna/wifi.ino

@@ -148,11 +148,6 @@ void wifiSetup() {
 
 		#endif
 
-        // Disconnect from MQTT server if no WIFI
-        if (code != MESSAGE_CONNECTED) {
-            if (mqttConnected()) mqttDisconnect();
-        }
-
         // Configure mDNS
 	    if (code == MESSAGE_CONNECTED) {