diff --git a/Src/main.c b/Src/main.c
index 61fa274..212b8ac 100644
--- a/Src/main.c
+++ b/Src/main.c
@@ -151,7 +151,7 @@ int main(void)
   /* Infinite loop */
   /* USER CODE BEGIN WHILE */
 	while (1) {
-		slcanFlushUSBBuffer();
+//		slcanFlushUSBBuffer();
 		slCanCheckCommand();
 		if (canRxFlags.flags.byte != 0) {
 			slcanReciveCanFrame(hcan.pRxMsg);
diff --git a/Src/slcan/slcan.c b/Src/slcan/slcan.c
index ce4bfe4..e358fe6 100644
--- a/Src/slcan/slcan.c
+++ b/Src/slcan/slcan.c
@@ -93,28 +93,28 @@ void slcanClose()
 	state = STATE_CONFIG;
 }
 
-int slcanFlushUSBBuffer()
-{
-	if (dataToSend != 0)
-	{
-		if (CDC_Transmit_FS(frameBuffer, dataToSend) == USBD_OK)
-		{
-			dataToSend = 0;
-			return 0;
-		}
-	}
-	return -1;
-}
-
-static int addToUSBBuffer(uint8_t * pointer, uint8_t len)
-{
-	if ((dataToSend + len) >= FRAME_BUFFER_SIZE)
-		return -1; // buffer overflow
-
-	memcpy(&frameBuffer[dataToSend], pointer, len);
-	dataToSend += len;
-	return 0;
-}
+//int slcanFlushUSBBuffer()
+//{
+//	if (dataToSend != 0)
+//	{
+//		if (CDC_Transmit_FS(frameBuffer, dataToSend) == USBD_OK)
+//		{
+//			dataToSend = 0;
+//			return 0;
+//		}
+//	}
+//	return -1;
+//}
+//
+//static int addToUSBBuffer(uint8_t * pointer, uint8_t len)
+//{
+//	if ((dataToSend + len) >= FRAME_BUFFER_SIZE)
+//		return -1; // buffer overflow
+//
+//	memcpy(&frameBuffer[dataToSend], pointer, len);
+//	dataToSend += len;
+//	return 0;
+//}
 
 
 
@@ -125,13 +125,10 @@ static void slcanOutputFlush(void)
 	if (hUsbDeviceFS.dev_state != USBD_STATE_CONFIGURED) // use auxiliary uart only if usb not connected
 		HAL_UART_Transmit(&huart2,sl_frame,sl_frame_len,100); //ll todo figure out time
 	else {
-		addToUSBBuffer(sl_frame, sl_frame_len);
-//		while (CDC_Transmit_FS(sl_frame, sl_frame_len) != USBD_OK);
-//		while (((USBD_CDC_HandleTypeDef*)hUsbDeviceFS.pClassData)->TxState)
-//		{
-//			volatile i;
-//			i++;
-//		}
+//		addToUSBBuffer(sl_frame, sl_frame_len);
+		while (((USBD_CDC_HandleTypeDef*)hUsbDeviceFS.pClassData)->TxState){;} //should change by hardware
+		while (CDC_Transmit_FS(sl_frame, sl_frame_len) != USBD_OK);
+
 	}
 	sl_frame_len = 0;
 }
diff --git a/Src/slcan/slcan.h b/Src/slcan/slcan.h
index f1d0d8d..c8b5745 100644
--- a/Src/slcan/slcan.h
+++ b/Src/slcan/slcan.h
@@ -15,7 +15,7 @@
 
 
 #define VERSION_FIRMWARE_MAJOR 2
-#define VERSION_FIRMWARE_MINOR 2
+#define VERSION_FIRMWARE_MINOR 3
 
 #define VERSION_HARDWARE_MAJOR 1
 #define VERSION_HARDWARE_MINOR 1
@@ -33,7 +33,7 @@
 //ex TZ12020506
 
 void slcanClose();
-int slcanFlushUSBBuffer();
+//int slcanFlushUSBBuffer();
 uint8_t slcanReciveCanFrame(CanRxMsgTypeDef *pRxMsg);
 int slCanProccesInput(uint8_t ch);
 void slCanCheckCommand();
diff --git a/Src/usbd_cdc_if.c b/Src/usbd_cdc_if.c
index 53a1211..46a8328 100644
--- a/Src/usbd_cdc_if.c
+++ b/Src/usbd_cdc_if.c
@@ -71,8 +71,8 @@
 /* USER CODE BEGIN PRIVATE_DEFINES */
 /* Define size for the receive and transmit buffer over CDC */
 /* It's up to user to redefine and/or remove those define */
-#define APP_RX_DATA_SIZE  32
-#define APP_TX_DATA_SIZE  32
+#define APP_RX_DATA_SIZE  128
+#define APP_TX_DATA_SIZE  128
 /* USER CODE END PRIVATE_DEFINES */
 /**
   * @}
@@ -230,7 +230,7 @@ static int8_t CDC_Control_FS  (uint8_t cmd, uint8_t* pbuf, uint16_t length)
     break;
 
   case CDC_SET_CONTROL_LINE_STATE:
-	  slcanClose();//ll
+	  slcanClose();
     break;
 
   case CDC_SEND_BREAK:
@@ -266,14 +266,11 @@ static int8_t CDC_Receive_FS (uint8_t* Buf, uint32_t *Len)
  uint32_t i;
  for (i =0; i != *Len; i++)
  {
-	 if (slCanProccesInput(Buf[i]) != 1)
-	 {
-		 USBD_CDC_ReceivePacket(&hUsbDeviceFS);
-	 }
+	 slCanProccesInput(Buf[i]);
  }
 
  USBD_CDC_SetRxBuffer(&hUsbDeviceFS, &Buf[0]);
-// USBD_CDC_ReceivePacket(&hUsbDeviceFS);
+ USBD_CDC_ReceivePacket(&hUsbDeviceFS);
 
  return (USBD_OK);
   /* USER CODE END 6 */