diff --git a/iflytop_canbus_protocol.hpp b/iflytop_canbus_protocol.hpp
index 4b66b09..03a1a63 100644
--- a/iflytop_canbus_protocol.hpp
+++ b/iflytop_canbus_protocol.hpp
@@ -131,6 +131,7 @@ typedef enum {
   kcmd_force_report       = 2,   // cmd:no,                 ack:none
   kcmd_read_sysinfo       = 3,   // cmd:no,                 ack:ack_sysinfo_t
   kcmd_read_taskinfo      = 4,   // cmd:taskoff,            ack:ask_taskinfo_t
+  kcmd_heart_ping         = 5,   // cmd:taskoff,            ack:ask_taskinfo_t
   kreport_heatpacket      = 50,  // cmd:no                  ack:no                      report:heatpacket_t
   kreport_exception_error = 51,  // report:error_code,subid
 
@@ -301,6 +302,7 @@ typedef struct {
  ***********************************************************************************************************************/
 
 typedef struct {
+  uint16_t heartIndex;
   uint16_t boardType;
 } report_heatpacket_data_t;