From c0cd2d48ece830bef0cf457e07e70c562837348e Mon Sep 17 00:00:00 2001
From: Fredrik Erlandsson <fredrik.e@gmail.com>
Date: Wed, 12 Dec 2018 09:29:45 +0100
Subject: [PATCH] add unique_id to SMHI (#19183)

---
 homeassistant/components/weather/smhi.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/homeassistant/components/weather/smhi.py b/homeassistant/components/weather/smhi.py
index c686b5c90e9..94873b03bd6 100644
--- a/homeassistant/components/weather/smhi.py
+++ b/homeassistant/components/weather/smhi.py
@@ -96,6 +96,11 @@ class SmhiWeather(WeatherEntity):
         self._fail_count = 0
         self._smhi_api = Smhi(self._longitude, self._latitude, session=session)
 
+    @property
+    def unique_id(self) -> str:
+        """Return a unique id."""
+        return '{}, {}'.format(self._latitude, self._longitude)
+
     @Throttle(MIN_TIME_BETWEEN_UPDATES)
     async def async_update(self) -> None:
         """Refresh the forecast data from SMHI weather API."""