From 628a7646018c783a0ebab64594ebf4a2141bea8a Mon Sep 17 00:00:00 2001
From: Marko Oldenburg <leongaultier@gmail.com>
Date: Sat, 30 Sep 2017 19:38:53 +0200
Subject: [PATCH] bugfix in timestampAge function

---
 74_XiaomiFlowerSens.pm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/74_XiaomiFlowerSens.pm b/74_XiaomiFlowerSens.pm
index 3fa749e..9385828 100644
--- a/74_XiaomiFlowerSens.pm
+++ b/74_XiaomiFlowerSens.pm
@@ -602,8 +602,9 @@ sub XiaomiFlowerSens_CallBatteryFirmware_UpdateTimeAge($) {
 
     my $hash    = shift;
 
-    my $UpdateTimeAge = gettimeofday() - $hash->{helper}{updateTimeCallBatteryFirmware};
     
+    $hash->{helper}{updateTimeCallBatteryFirmware}  = 0 if( not defined($hash->{helper}{updateTimeCallBatteryFirmware}) );
+    my $UpdateTimeAge = gettimeofday() - $hash->{helper}{updateTimeCallBatteryFirmware};
     
     return $UpdateTimeAge;
 }