From 59b49d34cc963ff97e5c92ed8ed92a2387b2502a Mon Sep 17 00:00:00 2001
From: Bascht74 <66269310+Bascht74@users.noreply.github.com>
Date: Mon, 5 Oct 2026 15:47:18 +0200
Subject: [PATCH] [tcp_uart][uart_tcp] Expose the no-arg load_settings() and
 mark UartTcp final (#20163)

---
 esphome/components/tcp_uart/tcp_uart.h          | 1 +
 esphome/components/uart_tcp/uart_tcp.h          | 2 +-
 tests/components/tcp_uart/test.esp32-idf.yaml   | 8 ++++++++
 tests/components/tcp_uart/test.esp8266-ard.yaml | 8 ++++++++
 4 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/esphome/components/tcp_uart/tcp_uart.h b/esphome/components/tcp_uart/tcp_uart.h
index 29f7af564a..e973c7a189 100644
--- a/esphome/components/tcp_uart/tcp_uart.h
+++ b/esphome/components/tcp_uart/tcp_uart.h
@@ -44,6 +44,7 @@ class TcpUart : public uart::UARTComponent, public Component {
   bool is_connected() override { return this->link_.connected(); }
 #if defined(USE_ESP8266) || defined(USE_ESP32)
   void load_settings(bool dump_config) override {}
+  using UARTComponent::load_settings;  // also bring in the no-arg overload for convenience
 #endif
 
  protected:
diff --git a/esphome/components/uart_tcp/uart_tcp.h b/esphome/components/uart_tcp/uart_tcp.h
index 1e19166f87..f557cca33f 100644
--- a/esphome/components/uart_tcp/uart_tcp.h
+++ b/esphome/components/uart_tcp/uart_tcp.h
@@ -14,7 +14,7 @@
 namespace esphome::uart_tcp {
 
 /// Copies raw bytes between one hardware UART and one TCP socket.
-class UartTcp : public Component, public uart::UARTDevice {
+class UartTcp final : public Component, public uart::UARTDevice {
  public:
   void set_host(const char *host) { this->link_.set_host(host); }
   void set_port(uint16_t port) { this->link_.set_port(port); }
diff --git a/tests/components/tcp_uart/test.esp32-idf.yaml b/tests/components/tcp_uart/test.esp32-idf.yaml
index 2d42c282f7..54bdfbb390 100644
--- a/tests/components/tcp_uart/test.esp32-idf.yaml
+++ b/tests/components/tcp_uart/test.esp32-idf.yaml
@@ -1,2 +1,10 @@
 packages:
   tcp_uart: !include common.yaml
+
+# load_settings() exists on ESP8266 and ESP32 only; both overloads must resolve.
+interval:
+  - interval: 60s
+    then:
+      - lambda: |-
+          id(tcp_uart_server).load_settings();
+          id(tcp_uart_server).load_settings(false);
diff --git a/tests/components/tcp_uart/test.esp8266-ard.yaml b/tests/components/tcp_uart/test.esp8266-ard.yaml
index 2d42c282f7..54bdfbb390 100644
--- a/tests/components/tcp_uart/test.esp8266-ard.yaml
+++ b/tests/components/tcp_uart/test.esp8266-ard.yaml
@@ -1,2 +1,10 @@
 packages:
   tcp_uart: !include common.yaml
+
+# load_settings() exists on ESP8266 and ESP32 only; both overloads must resolve.
+interval:
+  - interval: 60s
+    then:
+      - lambda: |-
+          id(tcp_uart_server).load_settings();
+          id(tcp_uart_server).load_settings(false);