From 3d44203cb57a56804b03b0924287efce769e9635 Mon Sep 17 00:00:00 2001
From: Theo Arends <11044339+arendst@users.noreply.github.com>
Date: Tue, 17 Nov 2020 13:53:49 +0100
Subject: [PATCH] Fix ESP32 KNX UDP multicastpackage

Fix ESP32 KNX UDP multicastpackage (#9811)
---
 lib/libesp32/ESP32-to-ESP8266-compat/src/ESP8266WiFi.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/libesp32/ESP32-to-ESP8266-compat/src/ESP8266WiFi.h b/lib/libesp32/ESP32-to-ESP8266-compat/src/ESP8266WiFi.h
index 09d404e72..df9f54273 100644
--- a/lib/libesp32/ESP32-to-ESP8266-compat/src/ESP8266WiFi.h
+++ b/lib/libesp32/ESP32-to-ESP8266-compat/src/ESP8266WiFi.h
@@ -78,7 +78,10 @@ class WiFiUDP32 : public WiFiUDP
         }
         void beginPacketMulticast(IPAddress multicast, uint16_t port, IPAddress interfaceAddr)
         {
-
+            if (0 == WiFiUDP::beginMulticastPacket()) {
+              WiFiUDP::beginMulticast(multicast, port);
+            }
+            WiFiUDP::beginMulticastPacket();
         }
 };