diff --git a/.gitmodules b/.gitmodules
index 0fcda5904a6..74d3d01078e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -421,3 +421,9 @@
 [submodule "frozen/Adafruit_CircuitPython_TAS2505"]
 	path = frozen/Adafruit_CircuitPython_TAS2505
 	url = https://github.com/adafruit/Adafruit_CircuitPython_TAS2505.git
+[submodule "ports/espressif/esp-hosted"]
+	path = ports/espressif/esp-hosted
+	url = https://github.com/espressif/esp-hosted-mcu.git
+[submodule "ports/espressif/esp-wifi-remote"]
+	path = ports/espressif/esp-wifi-remote
+	url = https://github.com/espressif/esp-wifi-remote.git
diff --git a/ports/espressif/CMakeLists.txt b/ports/espressif/CMakeLists.txt
index e612e4f31de..c303c282711 100644
--- a/ports/espressif/CMakeLists.txt
+++ b/ports/espressif/CMakeLists.txt
@@ -8,7 +8,13 @@ set(ENV{IDF_PATH} ${CMAKE_SOURCE_DIR}/esp-idf)
 set(COMPONENTS bt driver esp_driver_dac esp_driver_gpio esp_driver_gptimer esp_driver_i2c esp_driver_i2s esp_driver_ledc esp_driver_pcnt esp_driver_rmt esp_driver_sdmmc esp_driver_spi esp_driver_touch_sens esp_driver_tsens esp_driver_uart esp-tls esp_adc esp_event esp_netif esp_psram esp_security esp_wifi esptool_py freertos log lwip main mbedtls mdns pthread soc ulp wpa_supplicant esp_lcd vfs esp_stdio sdmmc esp-camera)
 set(EXTRA_COMPONENT_DIRS "esp-protocols/components/mdns" "esp-camera")
 
+if(CIRCUITPY_ESP_HOSTED)
+    list(APPEND EXTRA_COMPONENT_DIRS "esp-hosted" "esp-wifi-remote/components/esp_wifi_remote")
+    list(APPEND COMPONENTS esp-hosted esp_wifi_remote)
+endif()
+
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+set(ENV{ESP_IDF_VERSION} "${IDF_VERSION_MAJOR}.${IDF_VERSION_MINOR}")
 project(circuitpython)
 
 idf_build_set_property(__OUTPUT_SDKCONFIG 0)
diff --git a/ports/espressif/Makefile b/ports/espressif/Makefile
index 881bfbf45e6..f5e0c2fd168 100644
--- a/ports/espressif/Makefile
+++ b/ports/espressif/Makefile
@@ -6,6 +6,9 @@
 
 include ../../py/circuitpy_mkenv.mk
 
+# Keep dependency selection identical during automatic CMake reconfiguration.
+export IDF_COMPONENT_MANAGER = 0
+
 ifeq ($(IDF_TARGET),esp32s3)
 BT_IDF_TARGET = esp32c3
 else ifeq ($(IDF_TARGET),esp32c61)
@@ -254,9 +257,11 @@ endif
 
 ifneq ($(CIRCUITPY_WIFI),0)
 ifeq ($(filter $(IDF_TARGET),esp32s2 esp32p4),)
+ifneq ($(CIRCUITPY_ESP_HOSTED),1)
 REGISTRATION_FUNCTIONS += -u esp_coex_init_include_func
 endif
 endif
+endif
 
 
 #Debugging/Optimization
@@ -885,7 +890,7 @@ do-sdkconfig: $(BUILD)/esp-idf/config/sdkconfig.h
 QSTR_GLOBAL_REQUIREMENTS += $(BUILD)/esp-idf/config/sdkconfig.h
 $(BUILD)/esp-idf/config/sdkconfig.h: boards/$(BOARD)/sdkconfig boards/$(BOARD)/mpconfigboard.mk CMakeLists.txt | $(BUILD)/esp-idf
 	$(STEPECHO) "Create $@"
-	$(Q)env IDF_PATH=$(IDF_PATH) IDF_COMPONENT_MANAGER=0 cmake -S . -B $(BUILD)/esp-idf -DSDKCONFIG=$(BUILD)/esp-idf/sdkconfig -DSDKCONFIG_DEFAULTS="$(SDKCONFIGS)" -DCMAKE_TOOLCHAIN_FILE=$(IDF_PATH)/tools/cmake/toolchain-$(IDF_TARGET).cmake -DIDF_TARGET=$(IDF_TARGET) -GNinja
+	$(Q)env IDF_PATH=$(IDF_PATH) IDF_COMPONENT_MANAGER=0 cmake -S . -B $(BUILD)/esp-idf -DSDKCONFIG=$(BUILD)/esp-idf/sdkconfig -DSDKCONFIG_DEFAULTS="$(SDKCONFIGS)" -DCMAKE_TOOLCHAIN_FILE=$(IDF_PATH)/tools/cmake/toolchain-$(IDF_TARGET).cmake -DIDF_TARGET=$(IDF_TARGET) -DCIRCUITPY_ESP_HOSTED=$(CIRCUITPY_ESP_HOSTED) -GNinja
 	$(Q)$(PYTHON) tools/check-sdkconfig.py \
 		CIRCUITPY_DUALBANK=$(CIRCUITPY_DUALBANK) \
 		CIRCUITPY_STORAGE_EXTEND=$(CIRCUITPY_STORAGE_EXTEND) \
@@ -923,6 +928,7 @@ BINARY_WIFI_BLOBS = libcore.a libespnow.a libnet80211.a libpp.a libsmartconfig.a
 ifneq ($(IDF_TARGET),esp32p4)
 	BINARY_BLOBS = esp-idf/components/esp_phy/lib/$(IDF_TARGET)/libphy.a
 endif
+ifneq ($(CIRCUITPY_ESP_HOSTED),1)
 ifneq ($(CIRCUITPY_WIFI),0)
 	BINARY_BLOBS += $(addprefix esp-idf/components/esp_wifi/lib/$(IDF_TARGET)/, $(BINARY_WIFI_BLOBS))
 	BINARY_BLOBS += esp-idf/components/esp_coex/lib/$(IDF_TARGET)/libcoexist.a
@@ -931,13 +937,27 @@ ifneq ($(CIRCUITPY_WIFI),0)
 	endif
 endif
 
+endif
+
 ifeq ($(IDF_TARGET),esp32)
 BINARY_BLOBS += esp-idf/components/esp_phy/lib/$(IDF_TARGET)/librtc.a
 endif
 
 ESP_IDF_COMPONENTS_LINK = $(IDF_TARGET_ARCH) $(CHIP_COMPONENTS) app_update bootloader_support driver esp_driver_dma esp_driver_gpio esp_driver_gptimer esp_driver_i2c esp_driver_ledc esp_driver_spi esp_driver_uart efuse esp_adc esp_app_format esp_common esp_event esp_gdbstub esp_hal_ana_conv esp_hal_clock esp_hal_gpio esp_hal_gpspi esp_hal_i2c esp_hal_ledc esp_hal_mspi esp_hal_security esp_hal_timg esp_hal_uart esp_hal_wdt esp_hw_support esp_mm esp_partition esp_pm esp_ringbuf esp_rom esp_system esp_timer freertos hal heap log esp_libc nvs_flash nvs_sec_provider pthread soc spi_flash vfs esp_stdio
 ifneq ($(CIRCUITPY_WIFI),0)
-	ESP_IDF_COMPONENTS_LINK += esp_coex esp_netif esp_security esp-tls esp_wifi lwip mbedtls mdns wpa_supplicant esp_phy
+	ESP_IDF_COMPONENTS_LINK += esp_netif esp_security esp-tls esp_wifi lwip mbedtls mdns
+ifneq ($(CIRCUITPY_ESP_HOSTED),1)
+ESP_IDF_COMPONENTS_LINK += esp_coex esp_phy wpa_supplicant
+endif
+endif
+ifeq ($(CIRCUITPY_ESP_HOSTED),1)
+export ESP_IDF_VERSION := $(shell sed -nE 's/set\(IDF_VERSION_(MAJOR|MINOR) ([0-9]+)\)/\2/p' esp-idf/tools/cmake/version.cmake | paste -sd.)
+INC := -isystem esp-wifi-remote/components/esp_wifi_remote/idf_v$(ESP_IDF_VERSION)/include/injected \
+       -isystem esp-wifi-remote/components/esp_wifi_remote/idf_v$(ESP_IDF_VERSION)/include \
+       -isystem esp-wifi-remote/components/esp_wifi_remote/include \
+       -isystem esp-hosted/host/api/include -isystem esp-hosted/host $(INC)
+ESP_IDF_COMPONENTS_LINK += esp_wifi_remote esp-hosted esp_http_client http_parser console
+REGISTRATION_FUNCTIONS += -u esp_hosted_init
 endif
 ifneq ($(CIRCUITPY_BLEIO_NATIVE),0)
 	BLE_IMPL_esp32 := esp32
diff --git a/ports/espressif/common-hal/sdioio/SDCard.c b/ports/espressif/common-hal/sdioio/SDCard.c
index 35850f2f8ae..403722d11f1 100644
--- a/ports/espressif/common-hal/sdioio/SDCard.c
+++ b/ports/espressif/common-hal/sdioio/SDCard.c
@@ -22,7 +22,6 @@ static const char *TAG = "SDCard.c";
 
 static bool slot_in_use[2];
 static bool never_reset_sdio[2] = { false, false };
-static bool host_initialized = false;
 
 static void common_hal_sdioio_sdcard_check_for_deinit(sdioio_sdcard_obj_t *self) {
     if (common_hal_sdioio_sdcard_deinited(self)) {
@@ -35,9 +34,17 @@ static int check_pins(const mcu_pin_obj_t *clock, const mcu_pin_obj_t *command,
     // ESP32-S3 and P4 can use any pin for any SDMMC func in either slot
     // Default to SLOT_1 for SD cards
     ESP_LOGI(TAG, "Using chip with CONFIG_SOC_SDMMC_USE_GPIO_MATRIX");
-    if (!slot_in_use[1]) {
+    if (!slot_in_use[1]
+        #ifdef CONFIG_ESP_HOSTED_SDIO_HOST_INTERFACE
+        && CONFIG_ESP_HOSTED_SDIO_SLOT != 1
+        #endif
+        ) {
         return SDMMC_HOST_SLOT_1;
-    } else if (!slot_in_use[0]) {
+    } else if (!slot_in_use[0]
+               #ifdef CONFIG_ESP_HOSTED_SDIO_HOST_INTERFACE
+               && CONFIG_ESP_HOSTED_SDIO_SLOT != 0
+               #endif
+               ) {
         return SDMMC_HOST_SLOT_0;
     }
     #else
@@ -85,6 +92,7 @@ void common_hal_sdioio_sdcard_construct(sdioio_sdcard_obj_t *self,
     esp_err_t err = ESP_OK;
 
     sdmmc_host_t host = SDMMC_HOST_DEFAULT();
+    host.slot = sd_slot;
     host.max_freq_khz = frequency / 1000;
 
     sdmmc_slot_config_t slot_config = SDMMC_SLOT_CONFIG_DEFAULT();
@@ -113,7 +121,6 @@ void common_hal_sdioio_sdcard_construct(sdioio_sdcard_obj_t *self,
         if (err != ESP_OK) {
             mp_raise_OSError_msg_varg(MP_ERROR_TEXT("SDIO Init Error 0x%02x"), err);
         }
-        host_initialized = true;
     }
 
     err = sdmmc_host_init_slot(sd_slot, &slot_config);
@@ -251,13 +258,10 @@ void common_hal_sdioio_sdcard_deinit(sdioio_sdcard_obj_t *self) {
         return;
     }
 
+    sdmmc_host_deinit_slot(self->slot);
     never_reset_sdio[get_slot_index(self)] = false;
     slot_in_use[get_slot_index(self)] = false;
 
-    if (!slot_in_use[0] && !slot_in_use[1] && host_initialized) {
-        sdmmc_host_deinit();
-        host_initialized = false;
-    }
 
     reset_pin_number(self->command);
     self->command = COMMON_HAL_MCU_NO_PIN;
@@ -293,13 +297,12 @@ void common_hal_sdioio_sdcard_never_reset(sdioio_sdcard_obj_t *self) {
 void sdioio_reset(void) {
     for (size_t i = 0; i < MP_ARRAY_SIZE(slot_in_use); i++) {
         if (!never_reset_sdio[i]) {
+            if (slot_in_use[i]) {
+                sdmmc_host_deinit_slot(i);
+            }
             slot_in_use[i] = false;
         }
     }
-    if (!slot_in_use[0] && !slot_in_use[1] && host_initialized) {
-        sdmmc_host_deinit();
-        host_initialized = false;
-    }
 
     return;
 }
diff --git a/ports/espressif/common-hal/wifi/Radio.c b/ports/espressif/common-hal/wifi/Radio.c
index 78ce251def4..ceeb01afe61 100644
--- a/ports/espressif/common-hal/wifi/Radio.c
+++ b/ports/espressif/common-hal/wifi/Radio.c
@@ -24,7 +24,7 @@
 #include "common-hal/socketpool/__init__.h"
 
 #include "components/esp_netif/include/esp_netif_net_stack.h"
-#include "components/esp_wifi/include/esp_wifi.h"
+#include "esp_wifi.h"
 #include "soc/soc_caps.h"
 #include "components/lwip/include/apps/ping/ping_sock.h"
 #include "lwip/sockets.h"
diff --git a/ports/espressif/common-hal/wifi/ScannedNetworks.c b/ports/espressif/common-hal/wifi/ScannedNetworks.c
index 0a87d3ab342..2beb6b754a3 100644
--- a/ports/espressif/common-hal/wifi/ScannedNetworks.c
+++ b/ports/espressif/common-hal/wifi/ScannedNetworks.c
@@ -17,7 +17,7 @@
 #include "shared-bindings/wifi/Radio.h"
 #include "shared-bindings/wifi/ScannedNetworks.h"
 
-#include "components/esp_wifi/include/esp_wifi.h"
+#include "esp_wifi.h"
 #include "soc/soc_caps.h"
 
 static void wifi_scannednetworks_done(wifi_scannednetworks_obj_t *self) {
diff --git a/ports/espressif/common-hal/wifi/__init__.c b/ports/espressif/common-hal/wifi/__init__.c
index 7a9aea3b5e0..3dcbf1d7ed0 100644
--- a/ports/espressif/common-hal/wifi/__init__.c
+++ b/ports/espressif/common-hal/wifi/__init__.c
@@ -17,7 +17,7 @@
 #include "py/mpstate.h"
 #include "py/runtime.h"
 
-#include "components/esp_wifi/include/esp_wifi.h"
+#include "esp_wifi.h"
 
 #include "components/heap/include/esp_heap_caps.h"
 
@@ -40,6 +40,11 @@ wifi_radio_obj_t common_hal_wifi_radio_obj;
 
 #include "esp_ipc.h"
 
+#ifdef CONFIG_ESP_HOSTED_ENABLED
+#include "esp_hosted.h"
+#include "common-hal/microcontroller/Pin.h"
+#endif
+
 #ifdef CONFIG_IDF_TARGET_ESP32
 #include "nvs_flash.h"
 #endif
@@ -457,6 +462,19 @@ void common_hal_wifi_init(bool user_initiated) {
     if (!wifi_ever_inited) {
         ESP_ERROR_CHECK(esp_event_loop_create_default());
         ESP_ERROR_CHECK(esp_netif_init());
+        #ifdef CONFIG_ESP_HOSTED_ENABLED
+        const uint8_t pins[] = {
+            CONFIG_ESP_HOSTED_SDIO_PIN_CLK, CONFIG_ESP_HOSTED_SDIO_PIN_CMD,
+            CONFIG_ESP_HOSTED_SDIO_PIN_D0, CONFIG_ESP_HOSTED_SDIO_PIN_D1,
+            CONFIG_ESP_HOSTED_SDIO_PIN_D2, CONFIG_ESP_HOSTED_SDIO_PIN_D3,
+            CONFIG_ESP_HOSTED_SDIO_GPIO_RESET_SLAVE,
+        };
+        for (size_t i = 0; i < MP_ARRAY_SIZE(pins); i++) {
+            claim_pin_number(pins[i]);
+            never_reset_pin_number(pins[i]);
+        }
+        ESP_ERROR_CHECK(esp_hosted_init());
+        #endif
         wifi_ever_inited = true;
     }
 
diff --git a/ports/espressif/esp-hosted b/ports/espressif/esp-hosted
new file mode 160000
index 00000000000..dd0176e5fc9
--- /dev/null
+++ b/ports/espressif/esp-hosted
@@ -0,0 +1 @@
+Subproject commit dd0176e5fc959d79b306f6677a2f878123c58e9a
diff --git a/ports/espressif/esp-idf b/ports/espressif/esp-idf
index 2b900d1222c..577a17f7e4d 160000
--- a/ports/espressif/esp-idf
+++ b/ports/espressif/esp-idf
@@ -1 +1 @@
-Subproject commit 2b900d1222cfce5dfa340ed99375af69ec1ee192
+Subproject commit 577a17f7e4d40c70ba2dde2fa7209e7a77855f86
diff --git a/ports/espressif/esp-wifi-remote b/ports/espressif/esp-wifi-remote
new file mode 160000
index 00000000000..896c12ed915
--- /dev/null
+++ b/ports/espressif/esp-wifi-remote
@@ -0,0 +1 @@
+Subproject commit 896c12ed915adcb2f9a8297fe65814af6d1b7bf6
diff --git a/ports/espressif/mpconfigport.mk b/ports/espressif/mpconfigport.mk
index 48ab8d04580..0c6a9e650f5 100644
--- a/ports/espressif/mpconfigport.mk
+++ b/ports/espressif/mpconfigport.mk
@@ -347,11 +347,12 @@ else ifeq ($(IDF_TARGET),esp32p4)
 # No DAC
 CIRCUITPY_AUDIOIO = 0
 
-# No wifi
-# TODO: Support ESP32-C6 coprocessor on some boards.
+# Optional ESP-Hosted Wi-Fi coprocessor.
+CIRCUITPY_ESP_HOSTED ?= 0
+CIRCUITPY_ESPNOW = 0
 CIRCUITPY_BLEIO_NATIVE = 0
-CIRCUITPY_WIFI = 0
-CIRCUITPY_SSL = 0
+CIRCUITPY_WIFI = $(CIRCUITPY_ESP_HOSTED)
+CIRCUITPY_SSL = $(CIRCUITPY_ESP_HOSTED)
 
 # Second stage bootloader doesn't work when the factory partition is empty due to
 # UF2 missing.
diff --git a/tools/ci_fetch_deps.py b/tools/ci_fetch_deps.py
index 8ef4df9fc6f..fd870582414 100644
--- a/tools/ci_fetch_deps.py
+++ b/tools/ci_fetch_deps.py
@@ -157,6 +157,16 @@ def fetch(where):
             cwd=mbedtls,
         )
 
+    # ESP-Hosted keeps the protobuf-c runtime in a nested submodule.
+    esp_hosted = TOP / "ports" / "espressif" / "esp-hosted"
+    if (esp_hosted / ".gitmodules").exists():
+        depth_maybe = "" if clone_supports_filter else "--depth 1"
+        run(
+            "Init esp-hosted nested submodules",
+            f"git submodule update --init {filter_maybe} {depth_maybe} common/protobuf-c",
+            cwd=esp_hosted,
+        )
+
 
 def set_output(name, value):
     if "GITHUB_OUTPUT" in os.environ: