From 851d7e22e7382f1890c4a3afa16fa90b4eef78ef Mon Sep 17 00:00:00 2001
From: Rohan Kapoor <rohan@rohankapoor.com>
Date: Mon, 29 Oct 2018 00:07:57 -0700
Subject: [PATCH] Make light.yeelight stop doing IO when accessing properties
 (#17917)

---
 homeassistant/components/light/yeelight.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/homeassistant/components/light/yeelight.py b/homeassistant/components/light/yeelight.py
index 1275d854e0b..15f2d24fa8a 100644
--- a/homeassistant/components/light/yeelight.py
+++ b/homeassistant/components/light/yeelight.py
@@ -276,7 +276,9 @@ class YeelightLight(Light):
 
     @property
     def _properties(self) -> dict:
-        return self._bulb.last_properties
+        if self._bulb_device is None:
+            return {}
+        return self._bulb_device.last_properties
 
     # F821: https://github.com/PyCQA/pyflakes/issues/373
     @property