[esp32] Remove remaining using_esp_idf checks (#12623)

Co-authored-by: Claude <noreply@anthropic.com>

esphome/components/captive_portal/__init__.py

@@ -25,7 +25,7 @@ _LOGGER = logging.getLogger(__name__)
 
 def AUTO_LOAD() -> list[str]:
     auto_load = ["web_server_base", "ota.web_server"]
-    if CORE.using_esp_idf:
+    if CORE.is_esp32:
         auto_load.append("socket")
     return auto_load
 

esphome/components/i2c/__init__.py

@@ -146,7 +146,7 @@ def _final_validate(config):
     full_config = fv.full_config.get()[CONF_I2C]
     if CORE.using_zephyr and len(full_config) > 1:
         raise cv.Invalid("Second i2c is not implemented on Zephyr yet")
-    if CORE.using_esp_idf and get_esp32_variant() in ESP32_I2C_CAPABILITIES:
+    if CORE.is_esp32 and get_esp32_variant() in ESP32_I2C_CAPABILITIES:
         variant = get_esp32_variant()
         max_num = ESP32_I2C_CAPABILITIES[variant]["NUM"]
         if len(full_config) > max_num:

esphome/components/i2s_audio/__init__.py

@@ -232,6 +232,8 @@ def validate_use_legacy(value):
         if (not value[CONF_USE_LEGACY]) and (CORE.using_arduino):
             raise cv.Invalid("Arduino supports only the legacy i2s driver")
         _set_use_legacy_driver(value[CONF_USE_LEGACY])
+    elif CORE.using_arduino:
+        _set_use_legacy_driver(True)
     return value
 
 
@@ -261,8 +263,7 @@ def _final_validate(_):
 
 
 def use_legacy():
-    legacy_driver = _get_use_legacy_driver()
-    return not (CORE.using_esp_idf and not legacy_driver)
+    return _get_use_legacy_driver()
 
 
 FINAL_VALIDATE_SCHEMA = _final_validate

esphome/components/improv_serial/__init__.py

@@ -26,7 +26,7 @@ def validate_logger(config):
     logger_conf = fv.full_config.get()[CONF_LOGGER]
     if logger_conf[CONF_BAUD_RATE] == 0:
         raise cv.Invalid("improv_serial requires the logger baud_rate to be not 0")
-    if CORE.using_esp_idf and (
+    if CORE.is_esp32 and (
         logger_conf[CONF_HARDWARE_UART] == USB_CDC
         and get_esp32_variant() == VARIANT_ESP32S3
     ):

esphome/components/mdns/__init__.py

@@ -157,14 +157,12 @@ async def to_code(config):
         return
 
     if CORE.using_arduino:
-        if CORE.is_esp32:
-            cg.add_library("ESPmDNS", None)
-        elif CORE.is_esp8266:
+        if CORE.is_esp8266:
             cg.add_library("ESP8266mDNS", None)
         elif CORE.is_rp2040:
             cg.add_library("LEAmDNS", None)
 
-    if CORE.using_esp_idf:
+    if CORE.is_esp32:
         add_idf_component(name="espressif/mdns", ref="1.9.1")
 
     cg.add_define("USE_MDNS")

esphome/components/network/__init__.py

@@ -156,7 +156,7 @@ async def to_code(config):
             "High performance networking disabled by user configuration (overriding component request)"
         )
 
-    if CORE.is_esp32 and CORE.using_esp_idf and should_enable:
+    if CORE.is_esp32 and should_enable:
         # Check if PSRAM is guaranteed (set by psram component during final validation)
         psram_guaranteed = psram_is_guaranteed()
 
@@ -210,12 +210,12 @@ async def to_code(config):
                 "USE_NETWORK_MIN_IPV6_ADDR_COUNT", config[CONF_MIN_IPV6_ADDR_COUNT]
             )
         if CORE.is_esp32:
-            if CORE.using_esp_idf:
-                add_idf_sdkconfig_option("CONFIG_LWIP_IPV6", enable_ipv6)
-                add_idf_sdkconfig_option("CONFIG_LWIP_IPV6_AUTOCONFIG", enable_ipv6)
-            else:
+            if CORE.using_arduino:
                 add_idf_sdkconfig_option("CONFIG_LWIP_IPV6", True)
                 add_idf_sdkconfig_option("CONFIG_LWIP_IPV6_AUTOCONFIG", True)
+            else:
+                add_idf_sdkconfig_option("CONFIG_LWIP_IPV6", enable_ipv6)
+                add_idf_sdkconfig_option("CONFIG_LWIP_IPV6_AUTOCONFIG", enable_ipv6)
         elif enable_ipv6:
             cg.add_build_flag("-DCONFIG_LWIP_IPV6")
             cg.add_build_flag("-DCONFIG_LWIP_IPV6_AUTOCONFIG")

esphome/components/wifi/__init__.py

@@ -464,7 +464,7 @@ async def to_code(config):
         )
         cg.add(var.set_ap_timeout(conf[CONF_AP_TIMEOUT]))
         cg.add_define("USE_WIFI_AP")
-    elif CORE.is_esp32 and CORE.using_esp_idf:
+    elif CORE.is_esp32 and not CORE.using_arduino:
         add_idf_sdkconfig_option("CONFIG_ESP_WIFI_SOFTAP_SUPPORT", False)
         add_idf_sdkconfig_option("CONFIG_LWIP_DHCPS", False)
 
@@ -509,7 +509,7 @@ async def to_code(config):
         add_idf_sdkconfig_option("CONFIG_SPIRAM_TRY_ALLOCATE_WIFI_LWIP", True)
 
     # Apply high performance WiFi settings if high performance networking is enabled
-    if CORE.is_esp32 and CORE.using_esp_idf and has_high_performance_networking():
+    if CORE.is_esp32 and has_high_performance_networking():
         # Check if PSRAM is guaranteed (set by psram component during final validation)
         psram_guaranteed = psram_is_guaranteed()
 

esphome/core/__init__.py

@@ -798,6 +798,11 @@ class EsphomeCore:
 
     @property
     def using_esp_idf(self):
+        _LOGGER.warning(
+            "CORE.using_esp_idf was deprecated in 2026.1, will change behavior in 2026.6. "
+            "ESP32 Arduino builds on top of ESP-IDF, so ESP-IDF features are available in both frameworks. "
+            "Use CORE.is_esp32 and/or CORE.using_arduino instead."
+        )
         return self.target_framework == "esp-idf"
 
     @property