From abc870006cce42296a2f581478f79fbe69df2391 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Sat, 7 Mar 2026 07:25:13 -1000
Subject: [PATCH] [captive_portal] Enable support for RP2040 (#14505)

---
 esphome/components/captive_portal/__init__.py        | 9 ++++-----
 tests/components/captive_portal/test.rp2040-ard.yaml | 1 +
 2 files changed, 5 insertions(+), 5 deletions(-)
 create mode 100644 tests/components/captive_portal/test.rp2040-ard.yaml

diff --git a/esphome/components/captive_portal/__init__.py b/esphome/components/captive_portal/__init__.py
index 6c190814c0..cd877fc879 100644
--- a/esphome/components/captive_portal/__init__.py
+++ b/esphome/components/captive_portal/__init__.py
@@ -13,6 +13,7 @@ from esphome.const import (
     PLATFORM_ESP32,
     PLATFORM_ESP8266,
     PLATFORM_LN882X,
+    PLATFORM_RP2040,
     PLATFORM_RTL87XX,
     PlatformFramework,
 )
@@ -53,6 +54,7 @@ CONFIG_SCHEMA = cv.All(
             PLATFORM_ESP8266,
             PLATFORM_BK72XX,
             PLATFORM_LN882X,
+            PLATFORM_RP2040,
             PLATFORM_RTL87XX,
         ]
     ),
@@ -103,11 +105,8 @@ async def to_code(config):
     if config[CONF_COMPRESSION] == "gzip":
         cg.add_define("USE_CAPTIVE_PORTAL_GZIP")
 
-    if CORE.using_arduino:
-        if CORE.is_esp8266:
-            cg.add_library("DNSServer", None)
-        if CORE.is_libretiny:
-            cg.add_library("DNSServer", None)
+    if CORE.using_arduino and (CORE.is_esp8266 or CORE.is_libretiny or CORE.is_rp2040):
+        cg.add_library("DNSServer", None)
 
 
 # Only compile the ESP-IDF DNS server when using ESP-IDF framework
diff --git a/tests/components/captive_portal/test.rp2040-ard.yaml b/tests/components/captive_portal/test.rp2040-ard.yaml
new file mode 100644
index 0000000000..dade44d145
--- /dev/null
+++ b/tests/components/captive_portal/test.rp2040-ard.yaml
@@ -0,0 +1 @@
+<<: !include common.yaml