From 87ebd9467a06c9f4074dfdfb10b8b808703119a2 Mon Sep 17 00:00:00 2001
From: rudolfkoenig <>
Date: Thu, 4 Dec 2008 14:30:44 +0000
Subject: [PATCH] Serial.pm undefined bug fixed

git-svn-id: https://svn.fhem.de/fhem/trunk@277 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 fhem/FHEM/00_FHZ.pm | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/fhem/FHEM/00_FHZ.pm b/fhem/FHEM/00_FHZ.pm
index ccd3e4ca3..e0581f03d 100755
--- a/fhem/FHEM/00_FHZ.pm
+++ b/fhem/FHEM/00_FHZ.pm
@@ -538,9 +538,11 @@ FHZ_HandleWriteQueue($)
   if($hash->{QUEUECNT} > 0) {
     $hash->{QUEUECNT}--;
     my $bstring = shift(@{$hash->{QUEUE}});
-    FHZ_XmitLimitCheck($hash,$bstring);
-    $hash->{PortObj}->write($bstring);
-    InternalTimer(gettimeofday()+0.25, "FHZ_HandleWriteQueue", $hash, 1);
+    if(defined($bstring)) {
+      FHZ_XmitLimitCheck($hash,$bstring);
+      $hash->{PortObj}->write($bstring);
+      InternalTimer(gettimeofday()+0.25, "FHZ_HandleWriteQueue", $hash, 1);
+    }
   }
 }