From 7c7a56f704d918730aa8653acd486e35753b8d87 Mon Sep 17 00:00:00 2001
From: Shay Levy <levyshay1@gmail.com>
Date: Mon, 3 May 2021 06:58:14 +0300
Subject: [PATCH] Fix Shelly external sensors invalid 999 value (#49994)

---
 homeassistant/components/shelly/sensor.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/homeassistant/components/shelly/sensor.py b/homeassistant/components/shelly/sensor.py
index a7d2e1e72ce..9337011ba16 100644
--- a/homeassistant/components/shelly/sensor.py
+++ b/homeassistant/components/shelly/sensor.py
@@ -135,12 +135,14 @@ SENSORS = {
         unit=temperature_unit,
         value=lambda value: round(value, 1),
         device_class=sensor.DEVICE_CLASS_TEMPERATURE,
+        available=lambda block: block.extTemp != 999,
     ),
     ("sensor", "humidity"): BlockAttributeDescription(
         name="Humidity",
         unit=PERCENTAGE,
         value=lambda value: round(value, 1),
         device_class=sensor.DEVICE_CLASS_HUMIDITY,
+        available=lambda block: block.extTemp != 999,
     ),
     ("sensor", "luminosity"): BlockAttributeDescription(
         name="Luminosity",