From 341c99b4faa99b2ed5968d86db09366a230ac891 Mon Sep 17 00:00:00 2001
From: Otto Winter <otto@otto-winter.com>
Date: Mon, 1 Jul 2019 11:10:03 +0200
Subject: [PATCH] Better DHT error reporting

---
 esphome/components/dht/dht.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/esphome/components/dht/dht.cpp b/esphome/components/dht/dht.cpp
index 797137c08c..936f87e3fa 100644
--- a/esphome/components/dht/dht.cpp
+++ b/esphome/components/dht/dht.cpp
@@ -153,13 +153,15 @@ bool HOT DHT::read_sensor_(float *temperature, float *humidity, bool report_erro
 
   if (checksum_a != data[4] && checksum_b != data[4]) {
     if (report_errors) {
-      ESP_LOGE(TAG, "Checksum invalid: %u!=%u", checksum_a, data[4]);
+      ESP_LOGW(TAG, "Checksum invalid: %u!=%u", checksum_a, data[4]);
     }
     return false;
   }
 
   if (this->model_ == DHT_MODEL_DHT11) {
     *humidity = data[0];
+    if (*humidity > 100)
+      *humidity = NAN;
     *temperature = data[2];
   } else {
     uint16_t raw_humidity = (uint16_t(data[0] & 0xFF) << 8) | (data[1] & 0xFF);
@@ -170,18 +172,20 @@ bool HOT DHT::read_sensor_(float *temperature, float *humidity, bool report_erro
 
     if (raw_temperature == 1 && raw_humidity == 10) {
       if (report_errors) {
-        ESP_LOGE(TAG, "Invalid temperature+humidity! Sensor reported 1°C and 1%% Hum");
+        ESP_LOGW(TAG, "Invalid temperature+humidity! Sensor reported 1°C and 1%% Hum");
       }
       return false;
     }
 
     *humidity = raw_humidity * 0.1f;
+    if (*humidity > 100)
+      *humidity = NAN;
     *temperature = int16_t(raw_temperature) * 0.1f;
   }
 
   if (*temperature == 0.0f && (*humidity == 1.0f || *humidity == 2.0f)) {
     if (report_errors) {
-      ESP_LOGE(TAG, "DHT reports invalid data. Is the update interval too high or the sensor damaged?");
+      ESP_LOGW(TAG, "DHT reports invalid data. Is the update interval too high or the sensor damaged?");
     }
     return false;
   }