diff --git a/heart_rate_sensor_protocol.h b/heart_rate_sensor_protocol.h
index 38f7db5..0a97423 100644
--- a/heart_rate_sensor_protocol.h
+++ b/heart_rate_sensor_protocol.h
@@ -22,6 +22,7 @@ typedef enum {
   kifyhrs_ecode_no_record_find            = 7,
   kifyhrs_ecode_parameter_error           = 8,
   kifyhrs_ecode_electrode_is_not_inserted = 9,
+  kifyhrs_ecode_device_exception          = 10,
 } ify_hrs_error_code_t;
 
 typedef enum {
@@ -48,26 +49,27 @@ typedef enum {
 } ify_hrs_sensor_pos_t;
 
 typedef enum {
-  ify_hrs_cmd_read_device_version       = 1,
-  ify_hrs_cmd_read_sensor_info          = 2,
-  ify_hrs_cmd_read_device_state         = 3,
-  ify_hrs_cmd_read_time                 = 4,
-  ify_hrs_cmd_sync_time                 = 5,
-  ify_hrs_cmd_start_capture             = 6,
-  ify_hrs_cmd_stop_capture              = 7,
-  ify_hrs_cmd_start_realtime_report     = 8,
-  ify_hrs_cmd_stop_realtime_report      = 9,
-  ify_hrs_cmd_read_records_info         = 10,
-  ify_hrs_cmd_del_record                = 11,
-  ify_hrs_cmd_start_upload_record       = 12,
-  ify_hrs_cmd_enter_ota                 = 13,
-  ify_hrs_cmd_read_sn                   = 14,
-  ify_hrs_cmd_reset                     = 15,
-  ify_hrs_cmd_stop_upload_record        = 16,
-  ify_hrs_cmd_start_capture_time_v2     = 17,
-  ify_hrs_cmd_start_upload_record_v2    = 18,
-  ify_hrs_cmd_ads1293_error_detail_info = 19,  // 内部使用
-  ify_hrs_cmd_change_sn                 = 20,  // 修改sn编码，仅且支持一次修改，修改后不可再次修改
+  ify_hrs_cmd_read_device_version         = 1,
+  ify_hrs_cmd_read_sensor_info            = 2,
+  ify_hrs_cmd_read_device_state           = 3,
+  ify_hrs_cmd_read_time                   = 4,
+  ify_hrs_cmd_sync_time                   = 5,
+  ify_hrs_cmd_start_capture               = 6,
+  ify_hrs_cmd_stop_capture                = 7,
+  ify_hrs_cmd_start_realtime_report       = 8,
+  ify_hrs_cmd_stop_realtime_report        = 9,
+  ify_hrs_cmd_read_records_info           = 10,
+  ify_hrs_cmd_del_record                  = 11,
+  ify_hrs_cmd_start_upload_record         = 12,
+  ify_hrs_cmd_enter_ota                   = 13,
+  ify_hrs_cmd_read_sn                     = 14,
+  ify_hrs_cmd_reset                       = 15,
+  ify_hrs_cmd_stop_upload_record          = 16,
+  ify_hrs_cmd_start_capture_time_v2       = 17,
+  ify_hrs_cmd_start_upload_record_v2      = 18,
+  ify_hrs_cmd_ads1293_error_detail_info   = 19,  // 内部使用
+  ify_hrs_cmd_change_sn                   = 20,  // 修改sn编码，仅且支持一次修改，修改后不可再次修改
+  ify_hrs_cmd_read_device_exception_state = 21,  // 读取设备异常状态
 
   ify_hrs_report_heartrate_data     = 101,
   ify_hrs_report_battery_level      = 102,