diff --git a/components/bt/controller/esp32c6/Kconfig.in b/components/bt/controller/esp32c6/Kconfig.in
index a2f5ec997b..9876ec0ecd 100644
--- a/components/bt/controller/esp32c6/Kconfig.in
+++ b/components/bt/controller/esp32c6/Kconfig.in
@@ -985,3 +985,11 @@ config BT_LE_CTRL_SLV_FAST_RX_CONN_DATA_EN
         When this option is enabled, the Controller continues receiving PDUs
         In the next connection event instead of entering latency
         After a data packet is received.
+
+config BT_LE_CTRL_DL_ITVL_PHY_SYNC_EN
+    bool "Enables the automatic initiation of a data length update(Experimental)."
+    default n
+    help
+        When this option is enabled, the Controller automatically initiates a data length update
+        Using the appropriate data length parameters
+        When a PHY update or a connection interval update occurs.
diff --git a/components/bt/controller/esp32c6/bt.c b/components/bt/controller/esp32c6/bt.c
index a442f8d85c..de8d8f51fc 100644
--- a/components/bt/controller/esp32c6/bt.c
+++ b/components/bt/controller/esp32c6/bt.c
@@ -34,8 +34,8 @@
 #include "os/endian.h"
 
 #include "esp_bt.h"
-#include "esp_intr_alloc.h"
 #include "ble_priv.h"
+#include "esp_intr_alloc.h"
 #include "esp_sleep.h"
 #include "esp_pm.h"
 #ifdef CONFIG_ESP_PHY_ENABLED
@@ -133,7 +133,6 @@ typedef union {
     };
     uint32_t val;
 } bt_wakeup_params_t;
-
 /* External functions or variables
  ************************************************************************
  */
@@ -192,6 +191,7 @@ extern int r_ble_get_npl_element_info(esp_bt_controller_config_t *cfg, ble_npl_c
 extern char *ble_controller_get_compile_version(void);
 extern int esp_ble_register_bb_funcs(void);
 extern void esp_ble_unregister_bb_funcs(void);
+extern bool esp_ble_controller_lib_check(void);
 extern uint32_t _bt_bss_start;
 extern uint32_t _bt_bss_end;
 extern uint32_t _bt_controller_bss_start;
@@ -233,6 +233,11 @@ static void esp_bt_ctrl_log_partition_get_and_erase_first_block(void);
 #if CONFIG_FREERTOS_USE_TICKLESS_IDLE
 static bool esp_bt_check_wakeup_by_bt(void);
 #endif // CONFIG_FREERTOS_USE_TICKLESS_IDLE
+
+#if (CONFIG_BT_CONTROLLER_ONLY) && (CONFIG_BT_LE_SM_SC) && (!CONFIG_BT_LE_CRYPTO_STACK_MBEDTLS)
+#include "tinycrypt/ecc.h"
+static int ecc_rand_func(uint8_t *dst, unsigned int len);
+#endif // (CONFIG_BT_CONTROLLER_ONLY) && (CONFIG_BT_LE_SM_SC) && (!CONFIG_BT_LE_CRYPTO_STACK_MBEDTLS)
 /* Local variable definition
  ***************************************************************************
  */
@@ -1055,6 +1060,7 @@ static void ble_rtc_clk_init(esp_bt_controller_config_t *cfg)
     esp_bt_rtc_slow_clk_select(s_bt_lpclk_src);
 }
 
+
 esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg)
 {
     uint8_t mac[6];
@@ -1191,6 +1197,13 @@ esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg)
         goto free_controller;
     }
 
+    if (!esp_ble_controller_lib_check()) {
+        ESP_LOGW(NIMBLE_PORT_LOG_TAG, "Controller lib version mismatch!");
+    }
+
+#if (CONFIG_BT_CONTROLLER_ONLY) && (CONFIG_BT_LE_SM_SC) && (!CONFIG_BT_LE_CRYPTO_STACK_MBEDTLS)
+    uECC_set_rng(ecc_rand_func);
+#endif // (CONFIG_BT_CONTROLLER_ONLY) && (CONFIG_BT_LE_SM_SC) && (!CONFIG_BT_LE_CRYPTO_STACK_MBEDTLS)
     return ESP_OK;
 free_controller:
     hci_transport_deinit();
@@ -1443,7 +1456,6 @@ esp_err_t esp_bt_mem_release(esp_bt_mode_t mode)
     return ret;
 }
 
-
 esp_bt_controller_status_t esp_bt_controller_get_status(void)
 {
     return ble_controller_status;
@@ -1664,6 +1676,25 @@ static mbedtls_ecp_keypair keypair;
 #if CONFIG_BT_LE_SM_SC
 #include "tinycrypt/cmac_mode.h"
 #include "tinycrypt/ecc_dh.h"
+
+/* Used by uECC to get random data */
+static int ecc_rand_func(uint8_t *dst, unsigned int len)
+{
+    int offset_cnt = 0;
+    uint8_t *u8ptr = dst;
+    uint64_t random_64 = 0;
+
+    while(len > 0) {
+        random64 = (uint64_t)esp_random();
+        random64 = (random64 << 32)| (uint64_t)esp_random();;
+        offset_cnt = len < sizeof(uint64_t) ? len : sizeof(uint64_t);
+        memcpy(u8ptr, &random64, offset_cnt);
+        len -= offset_cnt;
+        u8ptr += offset_cnt;
+    }
+
+    return 1;
+}
 #endif // CONFIG_BT_LE_SM_SC
 #endif // CONFIG_BT_LE_CRYPTO_STACK_MBEDTLS
 
@@ -1755,11 +1786,11 @@ exit:
     }
 
 #else
-    if (uECC_valid_public_key(pk, &curve_secp256r1) < 0) {
+    if (uECC_valid_public_key(pk, uECC_secp256r1()) < 0) {
         return BLE_SM_KEY_ERR;
     }
 
-    rc = uECC_shared_secret(pk, priv, dh, &curve_secp256r1);
+    rc = uECC_shared_secret(pk, priv, dh, uECC_secp256r1());
     if (rc == TC_CRYPTO_FAIL) {
         return BLE_SM_KEY_ERR;
     }
@@ -1835,7 +1866,7 @@ int ble_sm_alg_gen_key_pair(uint8_t *pub, uint8_t *priv)
             return BLE_SM_KEY_ERR;
         }
 #else
-        if (uECC_make_key(pk, priv, &curve_secp256r1) != TC_CRYPTO_SUCCESS) {
+        if (uECC_make_key(pk, priv, uECC_secp256r1()) != TC_CRYPTO_SUCCESS) {
             return BLE_SM_KEY_ERR;
         }
 #endif  // CONFIG_BT_LE_CRYPTO_STACK_MBEDTLS
@@ -1851,7 +1882,6 @@ int ble_sm_alg_gen_key_pair(uint8_t *pub, uint8_t *priv)
 
 #endif // CONFIG_BT_LE_SM_LEGACY || CONFIG_BT_LE_SM_SC
 #endif // (!CONFIG_BT_NIMBLE_ENABLED) && (CONFIG_BT_CONTROLLER_ENABLED)
-
 #if CONFIG_BT_LE_DEBUG_REMAIN_SCENE_ENABLED
 #include "esp_gdbstub.h"
 #endif // CONFIG_BT_LE_DEBUG_REMAIN_SCENE_ENABLED
diff --git a/components/bt/controller/esp32c6/esp_bt_cfg.h b/components/bt/controller/esp32c6/esp_bt_cfg.h
index 71f7f9d194..e5d378ad9b 100644
--- a/components/bt/controller/esp32c6/esp_bt_cfg.h
+++ b/components/bt/controller/esp32c6/esp_bt_cfg.h
@@ -218,6 +218,13 @@ extern "C" {
 #define DEFAULT_BT_LE_CTRL_SLV_FAST_RX_CONN_DATA_EN (0)
 #endif
 
+
+#if defined(CONFIG_BT_LE_CTRL_DL_ITVL_PHY_SYNC_EN)
+#define DEFAULT_BT_LE_CTRL_DL_ITVL_PHY_SYNC_EN (CONFIG_BT_LE_CTRL_DL_ITVL_PHY_SYNC_EN)
+#else
+#define DEFAULT_BT_LE_CTRL_DL_ITVL_PHY_SYNC_EN (0)
+#endif
+
 #ifdef CONFIG_BT_LE_HCI_INTERFACE_USE_UART
 #define HCI_UART_EN CONFIG_BT_LE_HCI_INTERFACE_USE_UART
 #else
@@ -307,7 +314,6 @@ extern "C" {
 #define RUN_QA_TEST                         (0)
 #define NIMBLE_DISABLE_SCAN_BACKOFF         (0)
 #define BT_LL_CTRL_PRIO_LVL_CFG ((CONFIG_BT_LE_DFT_SYNC_SCHED_PRIO_LEVEL << 4) | (CONFIG_BT_LE_DFT_PERIODIC_ADV_SCHED_PRIO_LEVEL << 2) | CONFIG_BT_LE_DFT_ADV_SCHED_PRIO_LEVEL)
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/components/bt/include/esp32c6/include/esp_bt.h b/components/bt/include/esp32c6/include/esp_bt.h
index 3ccdeb7cb7..5771335a99 100644
--- a/components/bt/include/esp32c6/include/esp_bt.h
+++ b/components/bt/include/esp32c6/include/esp_bt.h
@@ -156,7 +156,7 @@ esp_err_t esp_ble_tx_power_set_enhanced(esp_ble_enhanced_power_type_t power_type
  */
 esp_power_level_t esp_ble_tx_power_get_enhanced(esp_ble_enhanced_power_type_t power_type, uint16_t handle);
 
-#define CONFIG_VERSION  0x20251104
+#define CONFIG_VERSION  0x20251125
 #define CONFIG_MAGIC    0x5A5AA5A5
 
 /**
@@ -236,6 +236,7 @@ typedef struct {
     uint8_t conn_rsv_cnt;                            /*!< BLE conn state machine reserve count number */
     uint8_t priority_level_cfg;                      /*!< The option for priority level configuration */
     uint8_t slv_fst_rx_lat_en;                       /*!< The option for enabling slave fast PDU reception during latency. */
+    uint8_t dl_itvl_phy_sync_en;                    /*!< The option for automatically initiate the data length update when phy update or connect interval update. */
     uint32_t config_magic;                           /*!< Magic number for configuration validation */
 } esp_bt_controller_config_t;
 
@@ -301,7 +302,8 @@ typedef struct {
     .adv_rsv_cnt                = BLE_LL_ADV_SM_RESERVE_CNT_N,                          \
     .conn_rsv_cnt               = BLE_LL_CONN_SM_RESERVE_CNT_N,                         \
     .priority_level_cfg         = BT_LL_CTRL_PRIO_LVL_CFG,                              \
-    .slv_fst_rx_lat_en          = DEFAULT_BT_LE_CTRL_SLV_FAST_RX_CONN_DATA_EN,         \
+    .slv_fst_rx_lat_en          = DEFAULT_BT_LE_CTRL_SLV_FAST_RX_CONN_DATA_EN,          \
+    .dl_itvl_phy_sync_en        = DEFAULT_BT_LE_CTRL_DL_ITVL_PHY_SYNC_EN,               \
     .config_magic = CONFIG_MAGIC,                                                       \
 }
 #elif CONFIG_IDF_TARGET_ESP32C61
@@ -365,6 +367,7 @@ typedef struct {
     .conn_rsv_cnt               = BLE_LL_CONN_SM_RESERVE_CNT_N,                         \
     .priority_level_cfg         = BT_LL_CTRL_PRIO_LVL_CFG,                              \
     .slv_fst_rx_lat_en          = DEFAULT_BT_LE_CTRL_SLV_FAST_RX_CONN_DATA_EN,          \
+    .dl_itvl_phy_sync_en        = DEFAULT_BT_LE_CTRL_DL_ITVL_PHY_SYNC_EN,               \
     .config_magic = CONFIG_MAGIC,                                                       \
 }
 #endif