From 4f7ea4d127d6e10f42f6bbd9cae8300c693f25af Mon Sep 17 00:00:00 2001
From: blissarts <54777977+blissarts@users.noreply.github.com>
Date: Fri, 23 Oct 2020 22:54:40 +0200
Subject: [PATCH] Add more clear description of unit (#15370)

it was not clear from this documentation how the unit of the derivative sensor is set if the "unit" parameter is not set. This PR should fix that
---
 source/_integrations/derivative.markdown | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/source/_integrations/derivative.markdown b/source/_integrations/derivative.markdown
index 8177b716b67..b1e264e015a 100644
--- a/source/_integrations/derivative.markdown
+++ b/source/_integrations/derivative.markdown
@@ -49,12 +49,12 @@ unit_prefix:
   default: None
   type: string
 unit_time:
-  description: SI unit of time of the derivative. Available units are s, min, h, d.
+  description: SI unit of time of the derivative. Available units are s, min, h, d. If this parameter is set, the attribute **unit_of_measurement** will be set like x/y where x is the unit of the sensor given via the **source** parameter and y is the value given here.
   required: false
   default: h
   type: string
 unit:
-  description: Unit of Measurement to be used for the derivative.
+  description: Unit of Measurement to be used for the derivative. This will overwrite the automatically set **unit_of_measurement** as explained above.
   required: false
   type: string
 time_window:
@@ -78,6 +78,6 @@ sensor:
     source: sensor.temperature
     name: Temperature change per hour
     round: 1
-    unit_time: h
+    unit_time: h # the resulting "unit_of_measurement" will be °C/h if the sensor.temperate has set °C as it's unit
     time_window: "00:30:00"  # we look at the change over the last half hour
 ```