diff --git a/fhem/contrib/PRESENCE/presenced b/fhem/contrib/PRESENCE/presenced
index e0672f3fa..33e5321f0 100755
--- a/fhem/contrib/PRESENCE/presenced
+++ b/fhem/contrib/PRESENCE/presenced
@@ -118,7 +118,7 @@ if($opt_h)
 }
 
 
-open(PIDFILE, ">$opt_P");
+open(PIDFILE, ">$opt_P") or die("Could not open PID file $opt_P: $!");
 print PIDFILE $$."\n";
 close PIDFILE;
 
@@ -380,7 +380,7 @@ local $SIG{HUP} = sub {$nextrun = gettimeofday();};
 				    }
 				}
 	
-			
+			sleep 0.1;
 		}
 	}
 }