From ebfce9115da2a28c4e3de46b006c0ee6692af5ea Mon Sep 17 00:00:00 2001
From: minomy13 <mail@minomy13.de>
Date: Wed, 13 Nov 2024 16:48:52 +0100
Subject: [PATCH] added C++ logic for enabling and disabling internal pull-up
 resistor from config

---
 esphome/components/dht/dht.cpp | 13 ++++++++++++-
 esphome/components/dht/dht.h   |  2 ++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/esphome/components/dht/dht.cpp b/esphome/components/dht/dht.cpp
index 7e61c3869a..58285e324f 100644
--- a/esphome/components/dht/dht.cpp
+++ b/esphome/components/dht/dht.cpp
@@ -24,6 +24,12 @@ void DHT::dump_config() {
     ESP_LOGCONFIG(TAG, "  Model: DHT22 (or equivalent)");
   }
 
+  if (this->use_internal_pullup_ == true) {
+    ESP_LOGCONFIG(TAG, "  Internal pull-up resistor enabled.")
+  } else {
+    ESP_LOGCONFIG(TAG, "  Internal pull-up resistor disabled.")
+  }
+
   LOG_UPDATE_INTERVAL(this);
 
   LOG_SENSOR("  ", "Temperature", this->temperature_sensor_);
@@ -101,7 +107,12 @@ bool HOT IRAM_ATTR DHT::read_sensor_(float *temperature, float *humidity, bool r
   } else {
     delayMicroseconds(800);
   }
-  this->pin_->pin_mode(gpio::FLAG_INPUT);
+
+  if (this->use_internal_pullup_ == true) {
+    this->pin_->pin_mode(gpio::FLAG_INPUT | gpio::FLAG_PULLUP);
+  } else {
+    this->pin_->pin_mode(gpio::FLAG_INPUT);
+  }
 
   {
     InterruptLock lock;
diff --git a/esphome/components/dht/dht.h b/esphome/components/dht/dht.h
index 327e8a4f5c..2b1411de76 100644
--- a/esphome/components/dht/dht.h
+++ b/esphome/components/dht/dht.h
@@ -42,6 +42,7 @@ class DHT : public PollingComponent {
   void set_model(DHTModel model) { model_ = model; }
   void set_temperature_sensor(sensor::Sensor *temperature_sensor) { temperature_sensor_ = temperature_sensor; }
   void set_humidity_sensor(sensor::Sensor *humidity_sensor) { humidity_sensor_ = humidity_sensor; }
+  void set_internal_pullup(bool use_internal_pullup) { this->use_internal_pullup_ = use_internal_pullup; }
 
   /// Set up the pins and check connection.
   void setup() override;
@@ -59,6 +60,7 @@ class DHT : public PollingComponent {
   bool is_auto_detect_{false};
   sensor::Sensor *temperature_sensor_{nullptr};
   sensor::Sensor *humidity_sensor_{nullptr};
+  bool use_internal_pullup_{true};
 };
 
 }  // namespace dht