diff --git a/iflytop_canbus_protocol.hpp b/iflytop_canbus_protocol.hpp
index 257f7c1..d5362bb 100644
--- a/iflytop_canbus_protocol.hpp
+++ b/iflytop_canbus_protocol.hpp
@@ -92,6 +92,7 @@ typedef enum {
   kerr_overtime          = 1,
   kerr_invalid_param     = 2,
   kerr_invalid_param_num = 3,
+  kerr_subdevice_offline = 4,
 
   // 驱动器错误
   kerr_motor_reset_error  = 100,
@@ -316,8 +317,11 @@ typedef struct {
 } report_exeception_data_t;
 
 typedef struct {
-  uint16_t subid;
-  uint32_t pressure;
+  uint8_t sensorDataNum;
+  struct {
+    uint8_t subid;
+    int16_t pressureVal;
+  } data[];
 } report_pressure_data_t;
 
 typedef struct {