esp_hosted downgrade

.github/actions/build-simulator/action.yml

@@ -40,6 +40,13 @@ runs:
       uses: jwlawson/actions-setup-cmake@v2
       with:
         cmake-version: '3.31.x'
+    - name: Setup Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.x'
+    - name: Install mbedtls codegen Python dependencies
+      shell: bash
+      run: pip install -r Libraries/mbedtls/scripts/driver.requirements.txt
     - name: "Prepare Project"
       shell: bash
       run: cmake -S ./ -B buildsim

Devices/m5stack-tab5/device.properties

@@ -33,8 +33,15 @@ sdkconfig.CONFIG_WIFI_PROV_AUTOSTOP_TIMEOUT=30
 sdkconfig.CONFIG_WIFI_PROV_STA_ALL_CHANNEL_SCAN=y
 sdkconfig.CONFIG_SLAVE_IDF_TARGET_ESP32C6=y
 sdkconfig.CONFIG_ESP_HOSTED_HOST_TRANSPORT_BUS_SDIO=y
-# esp_hosted 3.x ships a native pin/reset-GPIO preset for this exact board.
-sdkconfig.CONFIG_ESP32P4_TAB5_C6_BOARD=y
+sdkconfig.CONFIG_ESP_HOSTED_MEMPOOL_PREFER_SPIRAM=y
+sdkconfig.CONFIG_ESP_HOSTED_PRIV_SDIO_PIN_CLK_SLOT_1=12
+sdkconfig.CONFIG_ESP_HOSTED_PRIV_SDIO_PIN_CMD_SLOT_1=13
+sdkconfig.CONFIG_ESP_HOSTED_PRIV_SDIO_PIN_D0_SLOT_1=11
+sdkconfig.CONFIG_ESP_HOSTED_PRIV_SDIO_PIN_D1_4BIT_BUS_SLOT_1=10
+sdkconfig.CONFIG_ESP_HOSTED_PRIV_SDIO_PIN_D2_4BIT_BUS_SLOT_1=9
+sdkconfig.CONFIG_ESP_HOSTED_PRIV_SDIO_PIN_D3_4BIT_BUS_SLOT_1=8
+sdkconfig.CONFIG_ESP_HOSTED_SDIO_GPIO_RESET_SLAVE=15
+sdkconfig.CONFIG_ESP_SDIO_GPIO_RESET_SLAVE=15
 # ESP-NOW bridge (EspNowBackendHosted.cpp) registers 6 custom-RPC handlers (4 resp + 2 event); default cap is 3
 sdkconfig.CONFIG_ESP_HOSTED_HOST_FEAT_PEER_DATA_MAX_CUSTOM_MSG_HANDLERS=8
 # Performance: larger L2 cache reduces PSRAM stalls for draw/DPI buffers

Devices/unphone/CMakeLists.txt

@@ -3,5 +3,5 @@ file(GLOB_RECURSE SOURCE_FILES source/*.c*)
 idf_component_register(
     SRCS ${SOURCE_FILES}
     INCLUDE_DIRS "source"
-    REQUIRES TactilityKernel TactilityFreeRtos bq24295-module driver
+    REQUIRES TactilityKernel TactilityFreeRtos bq24295-module driver esp_driver_gpio
 )

Modules/crypt-module/source/crypt.cpp

@@ -156,19 +156,17 @@ static void getKey(uint8_t key[32]) {
 // psa_crypto_init() is safe to call more than once (subsequent calls are a cheap no-op); ESP-IDF
 // calls it during startup already, but the simulator has no equivalent, so call it here too
 // rather than depend on init order across callers.
-static void ensure_psa_crypto_init() {
-    static bool initialized = false;
-    if (!initialized) {
-        psa_crypto_init();
-        initialized = true;
-    }
+static psa_status_t ensure_psa_crypto_init() {
+    return psa_crypto_init();
 }
 
 void crypt_get_iv(const void* data, size_t dataLength, uint8_t iv[16]) {
-    ensure_psa_crypto_init();
+    check(ensure_psa_crypto_init() == PSA_SUCCESS);
     uint8_t hash[32];
     size_t hash_length;
-    psa_hash_compute(PSA_ALG_SHA_256, static_cast<const uint8_t*>(data), dataLength, hash, sizeof(hash), &hash_length);
+    check(psa_hash_compute(PSA_ALG_SHA_256, static_cast<const uint8_t*>(data),
+        dataLength, hash, sizeof(hash), &hash_length) == PSA_SUCCESS);
+    check(hash_length == sizeof(hash));
     memcpy(iv, hash, 16);
     mbedtls_platform_zeroize(hash, sizeof(hash));
 }

Platforms/platform-esp32/CMakeLists.txt

@@ -22,7 +22,7 @@ idf_component_register(
 
 if (DEFINED ENV{ESP_IDF_VERSION})
     GET_PROPERTY_FILE_CONTENT("${CMAKE_CURRENT_LIST_DIR}/../../sdkconfig" sdkconfig_text)
-    GET_PROPERTY_VALUE(sdkconfig_text "CONFIG_ESP_HOSTED_HOST" esp_host_enabled "n")
+    GET_PROPERTY_VALUE(sdkconfig_text "CONFIG_ESP_HOSTED_ENABLED" esp_host_enabled "n")
     if (esp_host_enabled STREQUAL "y")
         idf_component_optional_requires(PRIVATE espressif__esp_hosted)
     endif ()

Platforms/platform-esp32/include/tactility/drivers/esp32_esp_hosted_ota.h

@@ -3,5 +3,5 @@
 struct FirmwareOps;
 
 /** @return the esp_hosted co-processor FirmwareOps implementation. Only declared/linked when
- *  CONFIG_ESP_HOSTED_HOST - callers (esp32_wifi.cpp) must guard with the same #if. */
+ *  CONFIG_SLAVE_SOC_WIFI_SUPPORTED - callers (esp32_wifi.cpp) must guard with the same #if. */
 const FirmwareOps* esp32_esp_hosted_ota_get_ops();

Platforms/platform-esp32/private/bluetooth/esp32_ble_internal.h

@@ -172,5 +172,18 @@ extern size_t         active_hid_rpt_map_len; // esp32_ble_hid.cpp
 extern uint16_t       hid_appearance;         // esp32_ble_hid.cpp
 extern BleHidProfile  current_hid_profile;    // esp32_ble_hid.cpp
 
+// ---- HCI gate (ble_hci_gate.c) — P4/esp-hosted only ----
+// Controls whether hci_rx_handler forwards packets to NimBLE.
+// Set true after nimble_port_init(), false before nimble_port_stop().
+#if defined(CONFIG_ESP_HOSTED_ENABLED)
+#ifdef __cplusplus
+extern "C" {
+#endif
+void ble_hci_gate_set_active(bool active);
+bool ble_hci_gate_wait_idle(int max_ms);
+#ifdef __cplusplus
+}
+#endif
+#endif // CONFIG_ESP_HOSTED_ENABLED
 
 #endif // CONFIG_BT_NIMBLE_ENABLED

Platforms/platform-esp32/source/drivers/bluetooth/ble_hci_gate.c

@@ -0,0 +1,142 @@
+// ble_hci_gate.c — Strong override of the weak hci_rx_handler from vhci_drv.c.
+// Gates HCI packet delivery so packets are silently dropped when NimBLE is not
+// initialised, preventing null-npl_funcs crashes during radio teardown (P4 only).
+//
+// On ESP32-P4, sdio_process_rx_task runs independently of the NimBLE host and can
+// deliver an HCI packet after nimble_port_deinit() has zeroed npl_funcs.
+// dispatch_disable() calls ble_hci_gate_set_active(false) + ble_hci_gate_wait_idle()
+// before touching NimBLE, ensuring no in-flight or future hci_rx_handler call can
+// dereference NimBLE internals.
+
+#include <sdkconfig.h>
+#if defined(CONFIG_BT_NIMBLE_ENABLED) && defined(CONFIG_ESP_HOSTED_ENABLED)
+
+#include <stdbool.h>
+#include <stdatomic.h>
+#include <string.h>
+#include <esp_log.h>
+#include <esp_err.h>
+#include <freertos/FreeRTOS.h>
+#include <freertos/task.h>
+
+// NimBLE transport + HCI
+#include <nimble/transport.h>
+#include <nimble/hci_common.h>
+#include <os/os_mbuf.h>
+
+// H4 packet type indicators (same values used in vhci_drv.c)
+#define HCI_H4_EVT  0x04
+#define HCI_H4_ACL  0x02
+
+// Local defines from vhci_drv.c (not exported by any header)
+#define BLE_HCI_EVENT_HDR_LEN  (2)
+
+static const char* TAG = "ble_hci_gate";
+
+// ---- Gate state (zero-init = gate closed until dispatch_enable opens it) ----
+static atomic_bool s_hci_active   = ATOMIC_VAR_INIT(false);
+static atomic_int  s_hci_refcount = ATOMIC_VAR_INIT(0);
+
+void ble_hci_gate_set_active(bool active) {
+    atomic_store_explicit(&s_hci_active, active, memory_order_seq_cst);
+}
+
+// Spin-wait until all in-flight hci_rx_handler calls complete (max_ms timeout).
+// Returns true if drained within the timeout.
+bool ble_hci_gate_wait_idle(int max_ms) {
+    for (int elapsed = 0; elapsed < max_ms; elapsed++) {
+        if (atomic_load_explicit(&s_hci_refcount, memory_order_acquire) == 0)
+            return true;
+        vTaskDelay(pdMS_TO_TICKS(1));
+    }
+    return (atomic_load_explicit(&s_hci_refcount, memory_order_acquire) == 0);
+}
+
+// Strong override — replaces the H_WEAK_REF hci_rx_handler in vhci_drv.c.
+// All four esp-hosted transport drivers (SDIO, SPI, SPI-HD, UART) call this symbol.
+int hci_rx_handler(uint8_t *buf, size_t buf_len) {
+    // Fast path: gate closed — NimBLE not ready, drop silently
+    if (!atomic_load_explicit(&s_hci_active, memory_order_acquire))
+        return ESP_OK;
+
+    // Hold a reference so dispatch_disable() waits for us to finish
+    atomic_fetch_add_explicit(&s_hci_refcount, 1, memory_order_acquire);
+
+    // Double-check: gate may have closed between the first check and the increment
+    if (!atomic_load_explicit(&s_hci_active, memory_order_acquire)) {
+        atomic_fetch_sub_explicit(&s_hci_refcount, 1, memory_order_release);
+        return ESP_OK;
+    }
+
+    // ---- Original vhci_drv.c (NimBLE branch) logic ----
+    uint8_t *data = buf;
+    uint32_t len_total_read = buf_len;
+    int rc;
+
+    if (data[0] == HCI_H4_EVT) {
+        uint8_t *evbuf;
+        int totlen = BLE_HCI_EVENT_HDR_LEN + data[2];
+
+        if (totlen > UINT8_MAX + BLE_HCI_EVENT_HDR_LEN) {
+            ESP_LOGE(TAG, "Rx: len[%d] > max INT, drop", totlen);
+            atomic_fetch_sub_explicit(&s_hci_refcount, 1, memory_order_release);
+            return ESP_FAIL;
+        }
+        if (totlen > MYNEWT_VAL(BLE_TRANSPORT_EVT_SIZE)) {
+            ESP_LOGE(TAG, "Rx: len[%d] > max BLE, drop", totlen);
+            atomic_fetch_sub_explicit(&s_hci_refcount, 1, memory_order_release);
+            return ESP_FAIL;
+        }
+        if (data[1] == BLE_HCI_EVCODE_HW_ERROR) {
+            ESP_LOGE(TAG, "Rx: HW_ERROR");
+            atomic_fetch_sub_explicit(&s_hci_refcount, 1, memory_order_release);
+            return ESP_FAIL;
+        }
+
+        if ((data[1] == BLE_HCI_EVCODE_LE_META) &&
+            (data[3] == BLE_HCI_LE_SUBEV_ADV_RPT ||
+             data[3] == BLE_HCI_LE_SUBEV_EXT_ADV_RPT)) {
+            evbuf = ble_transport_alloc_evt(1);
+            if (!evbuf) {
+                ESP_LOGW(TAG, "Rx: Drop ADV Report: OOM (not fatal)");
+                atomic_fetch_sub_explicit(&s_hci_refcount, 1, memory_order_release);
+                return ESP_FAIL;
+            }
+        } else {
+            evbuf = ble_transport_alloc_evt(0);
+            if (!evbuf) {
+                ESP_LOGE(TAG, "Rx: transport_alloc_evt(0) failed");
+                atomic_fetch_sub_explicit(&s_hci_refcount, 1, memory_order_release);
+                return ESP_FAIL;
+            }
+        }
+
+        memset(evbuf, 0, sizeof *evbuf);
+        memcpy(evbuf, &data[1], totlen);
+        rc = ble_transport_to_hs_evt(evbuf);
+        if (rc) {
+            ESP_LOGE(TAG, "Rx: transport_to_hs_evt failed");
+            atomic_fetch_sub_explicit(&s_hci_refcount, 1, memory_order_release);
+            return ESP_FAIL;
+        }
+    } else if (data[0] == HCI_H4_ACL) {
+        struct os_mbuf *m = ble_transport_alloc_acl_from_ll();
+        if (!m) {
+            ESP_LOGE(TAG, "Rx: alloc_acl_from_ll failed");
+            atomic_fetch_sub_explicit(&s_hci_refcount, 1, memory_order_release);
+            return ESP_FAIL;
+        }
+        if ((rc = os_mbuf_append(m, &data[1], len_total_read - 1)) != 0) {
+            ESP_LOGE(TAG, "Rx: os_mbuf_append failed; rc=%d", rc);
+            os_mbuf_free_chain(m);
+            atomic_fetch_sub_explicit(&s_hci_refcount, 1, memory_order_release);
+            return ESP_FAIL;
+        }
+        ble_transport_to_hs_acl(m);
+    }
+
+    atomic_fetch_sub_explicit(&s_hci_refcount, 1, memory_order_release);
+    return ESP_OK;
+}
+
+#endif // CONFIG_BT_NIMBLE_ENABLED && CONFIG_ESP_HOSTED_ENABLED

Platforms/platform-esp32/source/drivers/bluetooth/esp32_ble.cpp

@@ -29,9 +29,11 @@ constexpr auto* TAG = "esp32_ble";
 #include <tactility/log.h>
 #include <esp_timer.h>
 
-#if defined(CONFIG_ESP_HOSTED_HOST)
+#if defined(CONFIG_ESP_HOSTED_ENABLED)
 #include <esp_hosted.h>
-#include <esp_hosted_bt_host_stack.h>
+extern "C" {
+#include <esp_hosted_misc.h>
+}
 #endif
 
 // ble_store_config_init() is not declared in the public header in some IDF versions.
@@ -679,16 +681,15 @@ static void dispatch_enable(BleCtx* ctx) {
         ble_publish_event(ctx->device, e);
     }
 
-#if defined(CONFIG_ESP_HOSTED_HOST)
-    // Over esp_hosted, the co-processor's BT controller only comes up via
-    // esp_hosted_bt_host_stack_setup() below, which needs the SDIO/SPI transport already up -
-    // BT can auto-enable before Wi-Fi has driven that bring-up, so (re)connect here first.
+#if defined(CONFIG_ESP_HOSTED_ENABLED)
     if (esp_hosted_connect_to_slave() != ESP_OK) {
         LOG_W(TAG, "esp_hosted_connect_to_slave failed");
     }
-    esp_hosted_bt_host_stack_cfg_t hosted_bt_cfg = ESP_HOSTED_BT_HOST_STACK_CONFIG_DEFAULT();
-    if (esp_hosted_bt_host_stack_setup(&hosted_bt_cfg) != ESP_OK) {
-        LOG_W(TAG, "esp_hosted_bt_host_stack_setup failed");
+    if (esp_hosted_bt_controller_init() != ESP_OK) {
+        LOG_W(TAG, "esp_hosted_bt_controller_init failed");
+    }
+    if (esp_hosted_bt_controller_enable() != ESP_OK) {
+        LOG_W(TAG, "esp_hosted_bt_controller_enable failed");
     }
 #endif
 
@@ -759,6 +760,9 @@ static void dispatch_enable(BleCtx* ctx) {
     ble_svc_gap_device_name_set(ctx->device_name);
     ble_att_set_preferred_mtu(BLE_ATT_MTU_MAX);
 
+#if defined(CONFIG_ESP_HOSTED_ENABLED)
+    ble_hci_gate_set_active(true);  // Open gate: NimBLE transport pool is ready
+#endif
     // Drain any stale "done" signal left over from a previous cycle (e.g. if the
     // last dispatch_disable() timed out waiting on it — see xSemaphoreTake below
     // with pdMS_TO_TICKS(2000)) so dispatch_disable() only ever consumes the
@@ -789,9 +793,9 @@ static void dispatch_disable(BleCtx* ctx) {
     // Blocking: waits for nimble_port_run() to exit.
     // Do NOT call ble_gap_adv_stop()/disc_cancel() before — if controller is
     // unresponsive they generate more HCI timeouts before the stop takes effect.
-    // The HCI link must stay bound here: nimble_port_stop() → ble_hs_stop() sends
+    // The HCI gate must stay OPEN here: nimble_port_stop() → ble_hs_stop() sends
     // HCI commands and needs to receive the command-complete events back from the
-    // controller. Unbinding before this point starves NimBLE of those events,
+    // controller. Closing the gate before this point starves NimBLE of those events,
     // causing HCI timeouts and a cascade of resets that crash in ble_hs_timer_sched.
     nimble_port_stop();
     // nimble_port_stop()'s internal semaphore only confirms the stop sentinel event was
@@ -806,17 +810,27 @@ static void dispatch_disable(BleCtx* ctx) {
             LOG_W(TAG, "host task did not signal completion in time");
         }
     }
-#if defined(CONFIG_ESP_HOSTED_HOST)
-    // Unbind before nimble_port_deinit() zeros npl_funcs. Unlike the old ble_hci_gate.c this
-    // repo carried for esp_hosted 2.x, esp_hosted 3.x exposes no drain/wait-for-in-flight
-    // primitive here, so a packet already inside the RX callback at this exact moment is a
-    // small theoretical race this migration cannot close without patching esp_hosted itself.
-    if (esp_hosted_bt_host_stack_teardown() != ESP_OK) {
-        LOG_W(TAG, "esp_hosted_bt_host_stack_teardown failed");
+#if defined(CONFIG_ESP_HOSTED_ENABLED)
+    // Close the gate NOW — after nimble_port_stop() returns the NimBLE host task has
+    // exited and nimble_port_deinit() is about to zero npl_funcs. Any HCI packet
+    // arriving after this point must not reach ble_transport_alloc_evt().
+    ble_hci_gate_set_active(false);
+    if (!ble_hci_gate_wait_idle(20)) {
+        LOG_W(TAG, "HCI gate drain timed out");
     }
 #endif
     nimble_port_deinit();
 
+#if defined(CONFIG_ESP_HOSTED_ENABLED)
+    // Symmetric with the enable-side esp_hosted_bt_controller_init/enable() calls.
+    if (esp_hosted_bt_controller_disable() != ESP_OK) {
+        LOG_W(TAG, "esp_hosted_bt_controller_disable failed");
+    }
+    if (esp_hosted_bt_controller_deinit(true) != ESP_OK) {
+        LOG_W(TAG, "esp_hosted_bt_controller_deinit failed");
+    }
+#endif
+
     ctx->spp_conn_handle.store(BLE_HS_CONN_HANDLE_NONE);
     ctx->spp_active.store(false);
     ctx->midi_conn_handle.store(BLE_HS_CONN_HANDLE_NONE);

Platforms/platform-esp32/source/drivers/esp32_esp_hosted_ota.cpp

@@ -2,7 +2,7 @@
 #include <sdkconfig.h>
 #endif
 
-#if defined(CONFIG_ESP_HOSTED_HOST)
+#if defined(CONFIG_SLAVE_SOC_WIFI_SUPPORTED)
 
 #include <tactility/drivers/esp32_esp_hosted_ota.h>
 #include <tactility/drivers/wifi.h>
@@ -251,4 +251,4 @@ const FirmwareOps* esp32_esp_hosted_ota_get_ops() {
     return &firmwareOps;
 }
 
-#endif // CONFIG_ESP_HOSTED_HOST
+#endif // CONFIG_SLAVE_SOC_WIFI_SUPPORTED

Platforms/platform-esp32/source/drivers/esp32_wifi.cpp

@@ -20,7 +20,7 @@
 
 #include <TactilityCpp/Allocator.h>
 
-#if defined(CONFIG_ESP_HOSTED_HOST)
+#if defined(CONFIG_SLAVE_SOC_WIFI_SUPPORTED)
 #include <tactility/drivers/esp32_esp_hosted_ota.h>
 #endif
 
@@ -583,7 +583,7 @@ error_t api_get_firmware_ops(Device* /*device*/, const FirmwareOps** ops, void**
     if (ops == nullptr || ctx == nullptr) {
         return ERROR_INVALID_ARGUMENT;
     }
-#if defined(CONFIG_ESP_HOSTED_HOST)
+#if defined(CONFIG_SLAVE_SOC_WIFI_SUPPORTED)
     // Only meaningful on a hosted board (P4+C6/C5 etc.) - this wifi device is backed by a real
     // co-processor with its own updatable firmware there. On a native (non-hosted) chip, this
     // device's "radio" is the chip's own built-in WiFi, nothing to update via this interface.

Tactility/Source/file/File.cpp

@@ -1,5 +1,6 @@
 #include <Tactility/file/File.h>
 
+#include <cerrno>
 #include <cstring>
 #include <fstream>
 #include <unistd.h>
@@ -195,7 +196,10 @@ static bool findOrCreateDirectoryInternal(const std::string& path, mode_t mode)
         return S_ISDIR(dir_stat.st_mode);
     }
 
-    return mkdir(path.c_str(), mode) == 0;
+    if (mkdir(path.c_str(), mode) == 0) {
+        return true;
+    }
+    return errno == EEXIST && stat(path.c_str(), &dir_stat) == 0 && S_ISDIR(dir_stat.st_mode);
 }
 
 std::string getLastPathSegment(const std::string& path) {

Tactility/Source/service/espnow/EspNowBackendHosted.cpp

@@ -2,7 +2,7 @@
 #include <sdkconfig.h>
 #endif
 
-#if defined(CONFIG_ESP_HOSTED_HOST)
+#if defined(CONFIG_SLAVE_SOC_WIFI_SUPPORTED)
 
 #include <Tactility/service/espnow/EspNowBackend.h>
 #include <Tactility/service/espnow/EspNowHostedTransport.h>
@@ -310,4 +310,4 @@ uint32_t getVersion() {
 
 }
 
-#endif // CONFIG_ESP_HOSTED_HOST
+#endif // CONFIG_SLAVE_SOC_WIFI_SUPPORTED

Tactility/Source/service/espnow/EspNowBackendNative.cpp

@@ -2,7 +2,7 @@
 #include <sdkconfig.h>
 #endif
 
-#if defined(CONFIG_SOC_WIFI_SUPPORTED) && !defined(CONFIG_ESP_HOSTED_HOST)
+#if defined(CONFIG_SOC_WIFI_SUPPORTED) && !defined(CONFIG_SLAVE_SOC_WIFI_SUPPORTED)
 
 #include <Tactility/service/espnow/EspNowBackend.h>
 #include <Tactility/service/wifi/Wifi.h>
@@ -205,4 +205,4 @@ uint32_t getVersion() {
 
 }
 
-#endif // CONFIG_SOC_WIFI_SUPPORTED && !CONFIG_ESP_HOSTED_HOST
+#endif // CONFIG_SOC_WIFI_SUPPORTED && !CONFIG_SLAVE_SOC_WIFI_SUPPORTED

Tactility/idf_component.yml

@@ -6,7 +6,7 @@ dependencies:
     rules:
       - if: "target in [esp32s3, esp32c6, esp32p4]"
   espressif/esp_hosted:
-    version: "3.0.7"
+    version: "2.12.11"
     rules:
       - if: "target == esp32p4"
   espressif/esp_wifi_remote:

device.py

@@ -425,10 +425,7 @@ def write_bluetooth_variables(output_file, device_properties: dict):
         output_file.write("CONFIG_BT_NIMBLE_ENABLED=y\n")
         if idf_target == "esp32p4":
             output_file.write("CONFIG_BT_NIMBLE_TRANSPORT_UART=n\n")
-            # esp_hosted 3.0 removed the legacy ESP_HOSTED_ENABLE_BT_NIMBLE knob in favor
-            # of a stack-agnostic feature flag; the app binds NimBLE to it explicitly via
-            # esp_hosted_bt_host_stack_setup() (see esp32_ble.cpp).
-            output_file.write("CONFIG_ESP_HOSTED_HOST_FEAT_BT=y\n")
+            output_file.write("CONFIG_ESP_HOSTED_ENABLE_BT_NIMBLE=y\n")
         # Move NimBLE host buffers to SPIRAM when available, regardless of target.
         # The default (INTERNAL) mode causes heap fragmentation after a disable+deinit
         # cycle, preventing a subsequent nimble_port_init() from allocating its buffers