From 4e0245da0db6d70e281033d08a922b6c4e5f31b4 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Wed, 16 Sep 2026 03:33:13 -0500
Subject: [PATCH] [gpio] Use a user provided default constructor for
 GPIOBinarySensor (#19143)

---
 esphome/components/gpio/binary_sensor/gpio_binary_sensor.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/esphome/components/gpio/binary_sensor/gpio_binary_sensor.h b/esphome/components/gpio/binary_sensor/gpio_binary_sensor.h
index 956443fab55..80636e29a6e 100644
--- a/esphome/components/gpio/binary_sensor/gpio_binary_sensor.h
+++ b/esphome/components/gpio/binary_sensor/gpio_binary_sensor.h
@@ -47,6 +47,9 @@ class GPIOBinarySensorStore {
 
 class GPIOBinarySensor final : public binary_sensor::BinarySensor, public Component {
  public:
+  // User provided, not "= default": `new(p) GPIOBinarySensor()` would zero-fill .bss that is already zero.
+  GPIOBinarySensor() {}
+
   // No destructor needed: ESPHome components are created at boot and live forever.
   // Interrupts are only detached on reboot when memory is cleared anyway.
 
@@ -70,7 +73,7 @@ class GPIOBinarySensor final : public binary_sensor::BinarySensor, public Compon
   void loop() override;
 
  protected:
-  GPIOPin *pin_;
+  GPIOPin *pin_{nullptr};
   GPIOBinarySensorStore store_;
 };