From 0fd9b594b611e310b1a828a0307a3e65e61cd625 Mon Sep 17 00:00:00 2001
From: Dominik Meyer <dmeyer@federationhq.de>
Date: Fri, 1 Mar 2024 22:03:18 +0100
Subject: [PATCH] FIX: undefined value

FIXES: #20
---
 FHEM/98_NTFY_CLIENT.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/FHEM/98_NTFY_CLIENT.pm b/FHEM/98_NTFY_CLIENT.pm
index b78fa85..0805c17 100644
--- a/FHEM/98_NTFY_CLIENT.pm
+++ b/FHEM/98_NTFY_CLIENT.pm
@@ -254,7 +254,7 @@ sub NTFY_Publish_Msg
 
                       readingsBeginUpdate($hash);
                       readingsBulkUpdateIfChanged($hash, "nrPublishedMessages", $nrPublishedMessages);
-                      readingsBulkUpdateIfChanged($hash, "lastUsedTopic", $msg->{topic});
+                      readingsBulkUpdateIfChanged($hash, "lastUsedTopic", join(",", @{$msg->{topics}}));
                       readingsBulkUpdateIfChanged($hash, "lastMessageSend", $msg->{text});
                       readingsBulkUpdateIfChanged($hash, "lastRawMessage", to_json($message));
                       readingsBulkUpdateIfChanged($hash, "lastEror", "");