From c2028f73786ad1d969958bf058ef42374a242916 Mon Sep 17 00:00:00 2001
From: Otto Winter <otto@otto-winter.com>
Date: Sat, 31 Aug 2019 21:14:10 +0200
Subject: [PATCH] DHT publish NAN on invalid reading

Fixes https://github.com/esphome/issues/issues/590
---
 esphome/components/dht/dht.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/esphome/components/dht/dht.cpp b/esphome/components/dht/dht.cpp
index 936f87e3fa..1e28246bee 100644
--- a/esphome/components/dht/dht.cpp
+++ b/esphome/components/dht/dht.cpp
@@ -56,6 +56,8 @@ void DHT::update() {
       str = " and consider manually specifying the DHT model using the model option";
     }
     ESP_LOGW(TAG, "Invalid readings! Please check your wiring (pull-up resistor, pin number)%s.", str);
+    this->temperature_sensor_->publish_state(NAN);
+    this->humidity_sensor_->publish_state(NAN);
     this->status_set_warning();
   }
 }