diff --git a/include/zble_module.h b/include/zble_module.h
index 3c42aa1..96fc963 100644
--- a/include/zble_module.h
+++ b/include/zble_module.h
@@ -1,4 +1,5 @@
 #pragma once
+#include <stdbool.h>
 #include <stdint.h>
 
 /**
@@ -6,15 +7,29 @@
  */
 
 typedef void (*on_service_init_t)(void);
+typedef enum {
+  kzble_event_none,
+  kzble_event_connected,
+  kzble_event_disconnected,
+} zble_event_type_t;
+
+typedef struct {
+  zble_event_type_t eventType;
+} zble_event_t;
 
 typedef struct {
   const char*       deviceName;
   on_service_init_t on_service_init;
 } zble_module_cfg_t;
 
+typedef void (*zble_event_listener_t)(zble_event_t* event);
+
 void zble_module_init(zble_module_cfg_t* cfg);
 
+void zble_module_reglistener(zble_event_listener_t event_listener);
+
 void zble_module_start_adv();
 void zble_module_stop_adv();
+bool zble_module_is_connected();
 
 int32_t zble_module_get_mtu_size();
\ No newline at end of file
diff --git a/src/zble_module.c b/src/zble_module.c
index b89e6c8..bbf24f1 100644
--- a/src/zble_module.c
+++ b/src/zble_module.c
@@ -36,18 +36,24 @@ NRF_BLE_GATT_DEF(m_gatt); /**< GATT module instance. */
  *                                    CODE                                     *
  *******************************************************************************/
 
-static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID; /**< 当前连接句柄 */
-static uint16_t m_mtu_size    = BLE_GATT_ATT_MTU_DEFAULT - 3;
+static uint16_t              m_conn_handle = BLE_CONN_HANDLE_INVALID; /**< 当前连接句柄 */
+static uint16_t              m_mtu_size    = BLE_GATT_ATT_MTU_DEFAULT - 3;
+static zble_event_listener_t m_event_listener;
 
 static void ble_evt_handler(ble_evt_t const* p_ble_evt, void* p_context) {
-  uint32_t err_code;
+  uint32_t            err_code;
+  static zble_event_t zevent;
   switch (p_ble_evt->header.evt_id) {
     case BLE_GAP_EVT_CONNECTED:
-      m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
+      m_conn_handle    = p_ble_evt->evt.gap_evt.conn_handle;
+      zevent.eventType = kzble_event_connected;
+      if (m_event_listener) m_event_listener(&zevent);
       break;
 
     case BLE_GAP_EVT_DISCONNECTED:
-      m_conn_handle = BLE_CONN_HANDLE_INVALID;
+      m_conn_handle    = BLE_CONN_HANDLE_INVALID;
+      zevent.eventType = kzble_event_disconnected;
+      if (m_event_listener) m_event_listener(&zevent);
       break;
 
     case BLE_GAP_EVT_PHY_UPDATE_REQUEST: {
@@ -128,10 +134,13 @@ void zble_module_stop_adv() {
   uint32_t err_code = sd_ble_gap_adv_stop(m_advertising.adv_handle);
   ZERROR_CHECK(err_code);
 }
+bool zble_module_is_connected() { return m_conn_handle != BLE_CONN_HANDLE_INVALID; }
 
 /*******************************************************************************
  *                                    INIT                                     *
  *******************************************************************************/
+void zble_module_reglistener(zble_event_listener_t event_listener) { m_event_listener = event_listener; }
+
 void zble_module_init(zble_module_cfg_t* cfg) {
   /**
    * @brief