diff --git a/applications/_main.c b/applications/_main.c
index b583cb2..c11a7e8 100644
--- a/applications/_main.c
+++ b/applications/_main.c
@@ -244,7 +244,7 @@ void iniCnt()
             LOG_W("TT server is not ready.");
             tcpInit();
             LOG_D("s=%d",isTCPok());
-            rt_thread_mdelay(5000);
+//            rt_thread_mdelay(5000);
         }
         {
             LOG_D("TT server is ready.");
diff --git a/applications/func/func.c b/applications/func/func.c
index d3880ce..46bc0c7 100644
--- a/applications/func/func.c
+++ b/applications/func/func.c
@@ -114,7 +114,7 @@ RT_WEAK int upSend(uint8_t *din, size_t len)
  */
 void selfTest()
 {
-    LOG_D("FUNC = selftest");
+    LOG_I("FUNC = selftest");
     rt_uint8_t rst[100]={0x5A, 0xA5, 0x32, 0x3E, 0x0A, 0x41};
     int p = 6;
     rt_uint8_t sysSta=1,xh=0,jh=0,commSpeed=0;
@@ -581,6 +581,18 @@ void parse3SData(uint8_t *din, size_t count)
     }
 }
 
+void chkACK(uint8_t *msg, size_t size)
+{
+    rt_uint8_t ackgood[] = { 0x88, 0xAA, 0xBB, 0x88, 0x41, 0x43, 0x4B }; //前四字节=帧头、后三字节=ACK
+    if (rt_memcmp(msg, ackgood, 4) == 0 && rt_memcmp(msg + size - 3, ackgood + 4, 3) == 0)
+    {
+        LOG_I("data is ACK.");
+    }
+    else {
+        LOG_W("NONE FUNCTION MATCH.");
+    }
+}
+
 /**
  * @brief 解析TT数据，TT收到的指令必是单指令，解析容易。
  *
@@ -594,39 +606,52 @@ void parseTTData(uint8_t *din, size_t len)
 * |          1          |     2     |     3     |     4     |     5     |    6    |          7          |     8      |
 * +---------------------+-----------+-----------+-----------+-----------+---------+---------------------+------------+
 * |      fstart[4]      |  fnum[2]  |  bak[2]   | ftype[2]  | fdlen[2]  | fcrc[1] |      ftccid[4]      | rawData[N] |
-* | 0x88,0xAA,0xBB,0x88 | 0x00,0x01 | 0x00,0x22 | 0x70,0x21 | 0x00,0xAA |  0x00   | 0x27,0x22,0x22,0x22 |            |
+* | 0x88,0xAA,0xBB,0x88 | 0x00,0x01 | 0x00,0x00 | 0x70,0x21 | 0x00,0xAA |  0x00   | 0x27,0x22,0x22,0x22 |            |
 * +---------------------+-----------+-----------+-----------+-----------+---------+---------------------+------------+
 */
-    uint8_t head[]={0x88,0xAA,0xBB,0x88, 0x00,0x01, 0x00,0x22, 0x70,0x21, 0x00,0xaa, 0x00,   0x27,0x22,0x22,0x22 };
+    uint8_t head[]={0x88,0xAA,0xBB,0x88, 0x00,0x01, 0x00,0x00, 0x70,0x21, 0x00,0xaa, 0x00,   0x27,0x22,0x22,0x22 };
                     //fstart[4]          fnum[2]    bak[2]     ftype[2]   fdlen[2]   fcrc[1] ftccid[4]
-//    uint8_t rst[10];
-//    size_t n=isInByte(din, len, head, 10, rst);
-//    uint8_t ndin[200];
-//    for (size_t i = 0; i < n; i++)
-//    {
-//        int n=rst[i+1]
-//        memcpy(ndin,din,rst[i+1]-rst[i]);
-//    }
-
-    uint8_t rst = memcmp(din,head,10);//只比较到ftype
-    if (rst)
-    {
-        LOG_W("帧头不匹配");
+    uint8_t rst[10];
+    size_t n=isInByte(din, len, head, 10, rst);
+    uint8_t ndin[200];
+    if (!n) {
+        LOG_W("无匹配数据");
         return;
     }
-
-    uint8_t id[30]="";
-    LOG_D("get new data: id=\"%s\", cur/all=[%d/%d]",bytes2str(din+17,7,10,"_",id),din[25],din[26]);
-    if (din[24] >> 7) // fcfg=数据类型。解析TT收到的数据时仅需解析“命令”，“数据”传输是单向的。
+    for (size_t i = 0; i < n; i++)
     {
-        LOG_W("浮标端仅接受指令，暂不支持数据。");
-        return;
-    }
-    uint8_t rawData[200];
-    uint8_t rawDataLen=len-27;
-    memcpy(rawData, din + 27, rawDataLen);
-    parse3SData(rawData,rawDataLen);
+        //按帧头分割
+        int cnt=(i+1<n)?rst[i+1]-rst[i]:len-rst[i];
+        memcpy(ndin,din+rst[i],cnt);
+        LOG_HEX("frame",16,ndin,cnt);
 
+        //判断是否为ACK
+        if (ndin[cnt-1] != 0xed) {
+            chkACK(ndin, cnt);
+        }
+        //数据
+        else
+        {
+            uint8_t rst = memcmp(ndin,head,10);//只比较到ftype
+            if (rst)
+            {
+                LOG_W("帧头不匹配");
+                return;
+            }
+
+            uint8_t id[30]="";
+            LOG_I("data info: id=\"%s\", cur/all=[%d/%d]",bytes2str(ndin+17,7,10,"_",id),ndin[25],ndin[26]);
+            if (ndin[24] >> 7) // fcfg=数据类型。解析TT收到的数据时仅需解析“命令”，“数据”传输是单向的。
+            {
+                LOG_W("浮标端仅接受指令，暂不支持数据。");
+                return;
+            }
+            uint8_t rawData[200];
+            uint8_t rawDataLen=cnt-27;
+            memcpy(rawData, ndin + 27, rawDataLen);
+            parse3SData(rawData,rawDataLen);
+        }
+    }
 
     // switch (din[24] & 0x7F) // 识别指令的目标地址
     // {
diff --git a/applications/tools.c b/applications/tools.c
index 98c2834..f6bc338 100644
--- a/applications/tools.c
+++ b/applications/tools.c
@@ -243,7 +243,9 @@ char *bytes2str(uint8_t *din, size_t count, int radix, char *sep, char *str)
         strcat(rst,sep);
         // printf("rst=%s,s=%s\n",rst,s);
     }
-    strncpy(str,rst,strlen(rst)-strlen(sep));//去掉末尾的连接符
+    int len = strlen(rst)-strlen(sep);
+    strncpy(str,rst,len);//去掉末尾的连接符
+    str[len]='\0';
     return str;
 }
 
diff --git a/applications/ttmsg/ttmsg.c b/applications/ttmsg/ttmsg.c
index 8a08e96..0dd8a8e 100644
--- a/applications/ttmsg/ttmsg.c
+++ b/applications/ttmsg/ttmsg.c
@@ -544,15 +544,16 @@ void recTT_thread_entry()
             { //收到数据长度为0表示tcp断开
                 break;
             }
-            LOG_D("%d Bytes received from TT",msg.size);
+            LOG_I("%d Bytes received from TT",msg.size);
             LOG_HEX("TTrec", 16, msg.data, msg.size);
             //此处处理接收到数据
-            rt_uint8_t rec_good[] = { 0x88, 0xAA, 0xBB, 0x88,  0x41,0x43,0x4B }; //前四字节=帧头、后三字节=ACK
-            if (rt_memcmp(msg.data, rec_good, 4) == 0 && rt_memcmp(msg.data+msg.size-3, rec_good+4, 3) == 0)
+//            rt_uint8_t rec_good[] = { 0x88, 0xAA, 0xBB, 0x88,  0x41,0x43,0x4B }; //前四字节=帧头、后三字节=ACK
+//            if (rt_memcmp(msg.data, rec_good, 4) == 0 && rt_memcmp(msg.data+msg.size-3, rec_good+4, 3) == 0)
+//            {
+//                LOG_I("ack is good.");
+//            }
+//            else
             {
-                LOG_I("ack is good.");
-            }
-            else {
                 LOG_D("try to parse data.");
                 parseTTData(msg.data,msg.size);
             }