diff --git a/main.go b/main.go
index ba63991..6c9df02 100644
--- a/main.go
+++ b/main.go
@@ -6,10 +6,12 @@ import (
 	"log"
 	"net"
 	"sync"
+
+	"smpptester/pdu"
 )
 
 func init() {
-	log.SetFlags(log.Lmicroseconds)
+	log.SetFlags(log.Lmicroseconds | log.Lshortfile)
 }
 
 // Function to create a submit_sm PDU
@@ -29,7 +31,7 @@ func createSubmitSMPDU() []byte {
 	validityPeriod := ""
 	registeredDelivery := byte(0x01)
 	replaceIfPresentFlag := byte(0x00)
-	dataCoding := byte(0x00)
+	dataCoding := byte(0x01)
 	smDefaultMsgID := byte(0x00)
 	shortMessage := "Hello, SMPP!"
 
@@ -37,7 +39,6 @@ func createSubmitSMPDU() []byte {
 	headerLength := 16
 	bodyLength := 1 + len(serviceType) + 1 + 1 + len(sourceAddr) + 1 + 1 + len(destinationAddr) + 1 + 1 + len(scheduleDeliveryTime) + 1 + len(validityPeriod) + 1 + 1 + 1 + 1 + 1 + len(shortMessage)
 	totalLength := headerLength + bodyLength
-	log.Printf("Total length: %d", totalLength)
 
 	// Create a buffer to hold the PDU
 	var buffer bytes.Buffer
@@ -136,7 +137,55 @@ func main() {
 	// 		go handleConnection(conn)
 	// 	}
 	// }()
+	submit := &pdu.SUBMIT_SM{
+		Header: &pdu.PDU_HEADER{
+			Command_length:  0,
+			Command_id:      4,
+			Command_status:  0,
+			Sequence_number: 1,
+		},
+		Service_type:           "hehe",
+		Source_addr_ton:        0x01,
+		Source_addr_npi:        0x01,
+		Source_addr:            "12345",
+		Dest_addr_ton:          0x01,
+		Dest_addr_npi:          0x01,
+		Destination_addr:       "67890",
+		Esm_class:              0x00,
+		Protocol_id:            0x00,
+		Priority_flag:          0x00,
+		Schedule_delivery_time: "",
+		Validity_period:        "",
+		Registered_delivery:    0x01,
+		Replace_if_present:     0x00,
+		Data_coding:            0x01,
+		Sm_default_msg_id:      0x00,
+		Short_message:          "Hello, SMPP!",
+	}
+	submit.UpdateSize()
+	buf := pdu.ByteBufferPool.Get(submit.Size())
+	defer pdu.ByteBufferPool.Put(buf)
+	submit.Encode(buf)
+	log.Println(buf.Bytes())
 	log.Println(createSubmitSMPDU())
+	// log.Println(pdu.Encode())
+	// serviceType := "CMT"
+	// sourceAddrTON := byte(0x01)
+	// sourceAddrNPI := byte(0x01)
+	// sourceAddr := "12345"
+	// destAddrTON := byte(0x01)
+	// destAddrNPI := byte(0x01)
+	// destinationAddr := "67890"
+	// esmClass := byte(0x00)
+	// protocolID := byte(0x00)
+	// priorityFlag := byte(0x00)
+	// scheduleDeliveryTime := ""
+	// validityPeriod := ""
+	// registeredDelivery := byte(0x01)
+	// replaceIfPresentFlag := byte(0x00)
+	// dataCoding := byte(0x01)
+	// smDefaultMsgID := byte(0x00)
+	// shortMessage := "Hello, SMPP!"
 
 	wg := &sync.WaitGroup{}
 	wg.Add(1)
@@ -150,7 +199,7 @@ func main() {
 	defer conn.Close()
 
 	go func() {
-		conn.Write(createSubmitSMPDU())
+		conn.Write(buf.Bytes())
 		data, err := conn.Read(make([]byte, 1024))
 		if err != nil {
 			log.Printf("Failed to read from connection: %+v", err)