diff --git a/libraries/mogo-adas/src/main/java/com/zhidao/support/adas/high/common/Constants.java b/libraries/mogo-adas/src/main/java/com/zhidao/support/adas/high/common/Constants.java
index b9f6f6c2aa..7205a2971b 100644
--- a/libraries/mogo-adas/src/main/java/com/zhidao/support/adas/high/common/Constants.java
+++ b/libraries/mogo-adas/src/main/java/com/zhidao/support/adas/high/common/Constants.java
@@ -36,7 +36,9 @@ public class Constants {
      */
     public static final byte[] RAW_MG = new byte[]{(byte) 0x6d, 0x67};
     /**
-     * 心跳协议
+     * 心跳协议 双向
+     * 鹰眼给Telematics发送心跳 鹰眼800版本开始发送 域控接收版本未知（不需要关心）
+     * Telematics给鹰眼发送心跳 域控550版本开始发送 鹰眼820版本开始接收
      */
     public static final ByteString RAW_HEARTBEAT = ByteString.of((byte) 0x6e, (byte) 0x68, (byte) 0x6f, (byte) 0x69);