From ee0b6e835f5d656b90964bb3ea10c15681d1b1b5 Mon Sep 17 00:00:00 2001
From: Otto Winter <otto@otto-winter.com>
Date: Fri, 18 Oct 2019 10:22:29 +0200
Subject: [PATCH] Sensor filter_out rounded (#765)

Fixes https://github.com/esphome/issues/issues/741
---
 esphome/components/sensor/filter.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/esphome/components/sensor/filter.cpp b/esphome/components/sensor/filter.cpp
index 3f0d39fcfc..f7a5b5d7ad 100644
--- a/esphome/components/sensor/filter.cpp
+++ b/esphome/components/sensor/filter.cpp
@@ -166,7 +166,11 @@ optional<float> FilterOutValueFilter::new_value(float value) {
     else
       return value;
   } else {
-    if (value == this->value_to_filter_out_)
+    int8_t accuracy = this->parent_->get_accuracy_decimals();
+    float accuracy_mult = pow10f(accuracy);
+    float rounded_filter_out = roundf(accuracy_mult * this->value_to_filter_out_);
+    float rounded_value = roundf(accuracy_mult * value);
+    if (rounded_filter_out == rounded_value)
       return {};
     else
       return value;