From 843b63edb433d38ca4386e09c04d4b0c0d81e52a Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Sat, 4 Apr 2026 10:53:15 -1000
Subject: [PATCH] Move host wake_loop_threadsafe from application.cpp to
 wake.cpp

---
 esphome/core/application.cpp | 13 +------------
 esphome/core/wake.cpp        | 14 +++++++++++++-
 2 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/esphome/core/application.cpp b/esphome/core/application.cpp
index 3df82e25a5..c04482c5d2 100644
--- a/esphome/core/application.cpp
+++ b/esphome/core/application.cpp
@@ -676,18 +676,7 @@ void Application::setup_wake_loop_threadsafe_() {
   }
 }
 
-void wake_loop_threadsafe() {
-  // Wakes up lwip_select() in main loop by writing to connected loopback socket
-  if (App.wake_socket_fd_ >= 0) {
-    const char dummy = 1;
-    // Non-blocking send - if it fails (unlikely), select() will wake on timeout anyway
-    // No error checking needed: we control both ends of this loopback socket.
-    // This is safe to call from FreeRTOS tasks - send() is thread-safe in lwip
-    // Socket is already connected to loopback address, so send() is faster than sendto()
-    lwip_send(App.wake_socket_fd_, &dummy, 1, 0);
-  }
-}
-#endif  // host wake_loop_threadsafe
+#endif  // USE_SOCKET_SELECT_SUPPORT
 
 void Application::get_build_time_string(std::span<char, BUILD_TIME_STR_SIZE> buffer) {
   ESPHOME_strncpy_P(buffer.data(), ESPHOME_BUILD_TIME_STR, buffer.size());
diff --git a/esphome/core/wake.cpp b/esphome/core/wake.cpp
index c172a26ab7..cc2b4734f7 100644
--- a/esphome/core/wake.cpp
+++ b/esphome/core/wake.cpp
@@ -84,6 +84,18 @@ void wakeable_delay(uint32_t ms) {
 
 #endif  // USE_RP2040
 
-// Host platform wake_loop_threadsafe() is in application.cpp (needs App.wake_socket_fd_)
+// === Host (UDP loopback socket) ===
+#ifdef USE_SOCKET_SELECT_SUPPORT
+#include "esphome/core/application.h"
+#include <lwip/sockets.h>
+
+void wake_loop_threadsafe() {
+  // Wakes up lwip_select() in main loop by writing to connected loopback socket
+  if (App.wake_socket_fd_ >= 0) {
+    const char dummy = 1;
+    lwip_send(App.wake_socket_fd_, &dummy, 1, 0);
+  }
+}
+#endif  // USE_SOCKET_SELECT_SUPPORT
 
 }  // namespace esphome