fix: missing perl modules

lib/FHEM/Core/Weather.pm

@@ -32,7 +32,7 @@ package FHEM::Core::Weather;
 use strict;
 use warnings;
 
-my $missingModul = 'apt install';
+my $missingModul = '';
 
 eval { use Time::HiRes qw /gettimeofday/; 1 }
   or $missingModul .= "libtime-hires-perl ";
@@ -777,6 +777,12 @@ sub Define {
     return $@ unless ( FHEM::Meta::SetInternals($hash) );
     use version 0.60; our $VERSION = FHEM::Meta::Get( $hash, 'version' );
 
+    return
+        'Cannot define Weather device. Please use "apt install '
+      . ${missingModul}
+      . ' to install missing perl modules'
+      if ($missingModul);
+
     my $usage =
 "syntax: define <name> Weather [API=<API>] [apikey=<apikey>] [location=<location>] [interval=<interval>] [lang=<lang>]";