diff --git a/examples/Client/Client.ino b/examples/Client/Client.ino
index a57eb17..d5fbded 100644
--- a/examples/Client/Client.ino
+++ b/examples/Client/Client.ino
@@ -36,6 +36,11 @@ void onSend(){
     Serial.println("Sending  Successfully");
 }
 
+
+// #define TEST_1
+#define TEST_2
+
+
 void setup()
 {
     Serial.begin(115200);
@@ -54,8 +59,10 @@ void setup()
     client.setOnSendSuccess(onSend);
 }
 
-
+#ifdef TEST_2
+//* for many packets
 bool dataReady = false;
+#endif
 
 void loop()
 {
@@ -74,10 +81,27 @@ void loop()
         Serial.println("connectNonBlock");
         client.startConnection(serverIP, SERVER_PORT);
 
+#ifdef TEST_1
+        //* for single packets
+        client.dataWrite((uint8_t *)&packetCounter, sizeof(packetCounter));
+        Serial.print("Sending packet: ");
+        for (size_t j = 0; j < sizeof(packetCounter); j++)
+        {
+            Serial.print(((uint8_t *)&packetCounter)[j], HEX);
+            Serial.print(" ");
+        }
+        Serial.println();
+        packetCounter++;
+#endif
+#ifdef TEST_2
+        //* for many packets
         dataReady = true;
+#endif
     }
 
-    if(dataReady && client.isConnected())
+#ifdef TEST_2
+    //* for many packets
+    if(dataReady && client.isConnected()) //* check connection
     {
         for (size_t i = 0; i < 3; i++)
         {
@@ -95,4 +119,5 @@ void loop()
         }
         dataReady = false;
     }
+#endif
 }
\ No newline at end of file
diff --git a/src/EthernetOverride/TCP.cpp b/src/EthernetOverride/TCP.cpp
index 4512829..b924dcc 100644
--- a/src/EthernetOverride/TCP.cpp
+++ b/src/EthernetOverride/TCP.cpp
@@ -263,17 +263,21 @@ bool EthernetMaketClient::dataWrite(){
         }
         lastActivityTime = millis();
     }
+    if(ret){
+        onSendSuccess();
+    }
     return ret;
 }
 
-bool EthernetMaketClient::dataWrite(uint8_t* data, uint16_t dataSize, bool override) {
+void EthernetMaketClient::dataWrite(uint8_t* data, uint16_t dataSize, bool override) {
     if (this->dataSize == 0 || override) {
         this->dataPtr = data;
         this->dataSize = dataSize;
-        return dataWrite();
+        if(isConnected()){
+            dataWrite();
+        }
     } else {
         Serial.println("Data buffer is not empty. Write operation is ignored.");
-        return false;
     }
 }
 
@@ -324,6 +328,5 @@ void EthernetMaketClient::startConnection(IPAddress ip, uint16_t port, bool nonB
         dstIP = ip;
         dstPort = port;
         isNonBlocking = nonBlock;
-        connectNonBlock(dstIP, dstPort);
         connectStatus = CONNECT_START;
 };
diff --git a/src/EthernetOverride/TCP.h b/src/EthernetOverride/TCP.h
index a01158b..36752b5 100644
--- a/src/EthernetOverride/TCP.h
+++ b/src/EthernetOverride/TCP.h
@@ -38,7 +38,7 @@ public:
     ConnectionStatusSimple connectNonBlock(IPAddress ip, uint16_t port);
     void startConnection(IPAddress ip, uint16_t port, bool nonBlock = true);
 
-    bool dataWrite(uint8_t* data, uint16_t dataSize, bool override = false);
+    void dataWrite(uint8_t* data, uint16_t dataSize, bool override = false);
     // bool send(uint8_t* data, uint16_t dataSize, IPAddress ip, uint16_t port);
 
     void disconnect();