Fix KNX reconnection issue

5.13.1a
* Fix KNX reconnection issue (#2679)

Author: arendst

README.md

@@ -182,6 +182,7 @@ People helping to keep the show on the road:
 - Gerhard Mutz for his SGP30 and Sunrise/Sunset driver
 - Nuno Ferreira for his HC-SR04 driver
 - Adrian Scillato for his (security)fixes and implementing and maintaining KNX
+- Gennaro Tortone for his Eastron SDM120 driver
 - Raymond Mouthaan for managing Wemos Wiki information
 - Norbert Richter, Frogmore42 and Jason2866 for providing many issue answers
 - Many more providing Tips, Pocs or PRs

sonoff/_releasenotes.ino

@@ -6,6 +6,7 @@
  * Fix several timer data input and output errors (#2597, #2620)
  * Fix KNX config error (#2628)
  * Fix sensor MHZ-19 vanishing data over time (#2659)
+ * Fix KNX reconnection issue (#2679)
  * Add Portuguese in Brazil language file
  * Add rule state test for On/Off in addition to 0/1 (#2613)
  * Add hardware serial option to MHZ-19 sensor (#2659)

sonoff/support.ino

@@ -35,6 +35,10 @@ byte oswatch_blocked_loop = 0;
 //void OsWatchTicker() ICACHE_RAM_ATTR;
 #endif  // USE_WS2812_DMA
 
+#ifdef USE_KNX
+bool knx_started = false;
+#endif  // USE_KNX
+
 void OsWatchTicker()
 {
   unsigned long t = millis();
@@ -822,11 +826,20 @@ void WifiCheck(uint8_t param)
         }
 #endif  // USE_EMULATION
 #endif  // USE_WEBSERVER
+#ifdef USE_KNX
+        if (!knx_started && Settings.flag.knx_enabled) {
+          KNXStart();
+          knx_started = true;
+        }
+#endif  // USE_KNX
       } else {
 #if defined(USE_WEBSERVER) && defined(USE_EMULATION)
         UdpDisconnect();
 #endif  // USE_EMULATION
         mdns_begun = false;
+#ifdef USE_KNX
+        knx_started = false;
+#endif  // USE_KNX
       }
     }
   }

sonoff/webserver.ino

@@ -392,9 +392,6 @@ void StartWebserver(int type, IPAddress ipweb)
       }
 #endif  // USE_EMULATION
       WebServer->onNotFound(HandleNotFound);
-#ifdef USE_KNX
-      KNXStart();
-#endif // USE_KNX
     }
     reset_web_log_flag = 0;
     WebServer->begin(); // Web server start