diff --git a/entry/src/main/ets/utils/business/JudgeUdpBusiness.ets b/entry/src/main/ets/utils/business/JudgeUdpBusiness.ets
index 510828d..b601406 100644
--- a/entry/src/main/ets/utils/business/JudgeUdpBusiness.ets
+++ b/entry/src/main/ets/utils/business/JudgeUdpBusiness.ets
@@ -30,7 +30,7 @@ class JudgeUdpBusiness {
   private carInfo: CarInfoType = {}
   private singlePlay: boolean = false
   private lsh: string = ""
-  private serialIndex: number = 0
+  private serialIndex: number = 1
 
   constructor() {
     if (!JudgeUdpBusiness.instance) {
@@ -39,7 +39,7 @@ class JudgeUdpBusiness {
     return JudgeUdpBusiness.instance
   }
 
-  async getMessageHeartbeat(msg: string): Promise<number[]> {
+  async getMessageHeartbeat(msg: string, isEnd: boolean = false): Promise<number[]> {
     let gpsDigit = JudgeConfig.fourInOneScreen.gpsDigit
     const asclshArr = StringToASCII(FillZero(
       this.singlePlay
@@ -77,7 +77,7 @@ class JudgeUdpBusiness {
       //科目类型(0:未考试 1:科目二 2:科目三) + 考试开始时间
       NumberToByteArray(`${0}${'00:00:000'}`, 4 * 8),
       // 消息序号
-      NumberToByteArray(this.serialIndex, 2 * 8),
+      NumberToByteArray(isEnd ? 0 : this.serialIndex, 2 * 8),
       translateSignals,
       NumberToByteArray(tempSd * 100, 2 * 8),
       NumberToByteArray(plcData.sensor.fdjzs / 100, 8),
@@ -128,7 +128,11 @@ class JudgeUdpBusiness {
       result = result.concat(itemArr)
     })
     // AppStorage.setOrCreate("serialIndex", 0)
-    this.serialIndex = 0
+    if (isEnd) {
+      this.serialIndex = 1
+    } else {
+      this.serialIndex += 1
+    }
     return [...new Uint8Array(result)]
   }