From f68ce29e5f945ae8ba0cfbbaa90238806f832f65 Mon Sep 17 00:00:00 2001
From: rudolfkoenig <>
Date: Sun, 28 Jan 2024 09:37:24 +0000
Subject: [PATCH] 90_at.pm: yet another stupidity guard (Forum #136840)

git-svn-id: https://svn.fhem.de/fhem/trunk@28440 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 fhem/FHEM/90_at.pm | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fhem/FHEM/90_at.pm b/fhem/FHEM/90_at.pm
index bb01f4962..82598718a 100644
--- a/fhem/FHEM/90_at.pm
+++ b/fhem/FHEM/90_at.pm
@@ -117,8 +117,10 @@ at_Define($$)
   if($abstime) {
     $nt = $abstime;
 
-  } elsif($rel eq "+") {
-    $nt += ($hr*3600+$min*60+$sec); # Relative time
+  } elsif($rel eq "+") { # Relative time
+    my $diff = $hr*3600+$min*60+$sec;
+    return "Cowardly refusing to start a busy loop" if(!$diff); #136840
+    $nt += $diff;
 
   } else {
     my @lt = localtime($ot);