diff --git a/iflytop_canbus_protocol.hpp b/iflytop_canbus_protocol.hpp
index 1976cb9..262f2c4 100644
--- a/iflytop_canbus_protocol.hpp
+++ b/iflytop_canbus_protocol.hpp
@@ -1,5 +1,6 @@
 #pragma once
 #include <stdint.h>
+
 extern "C" {
 #pragma pack(1)
 typedef struct {
@@ -9,6 +10,12 @@ typedef struct {
   uint16_t function_id;
   uint8_t  params[];
 } zcanbus_packet_t;
+
+typedef struct {
+  zcanbus_packet_t packet;
+  uint8_t          boardType;
+} heatpacket_t;
+
 #pragma pack()
 
 typedef enum {
@@ -16,5 +23,35 @@ typedef enum {
   kreceipt,
   kerror_receipt,
   kreport,
+  kheat,  // 心跳
 } packet_type_t;
+
+typedef enum {
+  kMainBoard                  = 0,  // 主机
+  kBoardType_LiquidCtrl       = 1,  // 液路板
+  kBoardType_PowerControl     = 2,  // 电源板
+  kBoardType_ExtBallValveCtrl = 3,  // 外部球阀控制板
+  kBoardType_H2O2Sensor       = 4,  // H2O2传感器板
+} BoardType_t;
+
+typedef enum {
+
+  kcmd_heatpacket_report = 0 * 100,
+  kcmd_read_board_info   = 0 * 100 + 1,
+
+} cmd_t;
+
+#define HEART_OVERTIME_MS (10 * 1000)
+
+#pragma pack(1)
+
+/***********************************************************************************************************************
+ *                                                       心跳包                                                        *
+ ***********************************************************************************************************************/
+typedef struct {
+  zcanbus_packet_t packet;
+  uint8_t          boardType;
+} heatpacket_report_t;
+
+#pragma pack()
 }