From a4aa30fc73a625a5567b68bc6d06733694b8efcd Mon Sep 17 00:00:00 2001
From: Rene Nulsch <33263735+ReneNulschDE@users.noreply.github.com>
Date: Tue, 4 Sep 2018 08:46:04 +0200
Subject: [PATCH] Fix SystemMonitor IP address sensor (#16394)

---
 homeassistant/components/sensor/systemmonitor.py | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/homeassistant/components/sensor/systemmonitor.py b/homeassistant/components/sensor/systemmonitor.py
index aa448ddf56e..de8e9783f92 100644
--- a/homeassistant/components/sensor/systemmonitor.py
+++ b/homeassistant/components/sensor/systemmonitor.py
@@ -6,6 +6,7 @@ https://home-assistant.io/components/sensor.systemmonitor/
 """
 import logging
 import os
+import socket
 
 import voluptuous as vol
 
@@ -61,9 +62,9 @@ IO_COUNTER = {
     'packets_in': 3,
 }
 
-IF_ADDRS = {
-    'ipv4_address': 0,
-    'ipv6_address': 1,
+IF_ADDRS_FAMILY = {
+    'ipv4_address': socket.AF_INET,
+    'ipv6_address': socket.AF_INET6,
 }
 
 
@@ -165,7 +166,9 @@ class SystemMonitorSensor(Entity):
         elif self.type == 'ipv4_address' or self.type == 'ipv6_address':
             addresses = psutil.net_if_addrs()
             if self.argument in addresses:
-                self._state = addresses[self.argument][IF_ADDRS[self.type]][1]
+                for addr in addresses[self.argument]:
+                    if addr.family == IF_ADDRS_FAMILY[self.type]:
+                        self._state = addr.address
             else:
                 self._state = None
         elif self.type == 'last_boot':