diff --git a/usart.cpp b/usart.cpp
index 9711f5a..016ead4 100644
--- a/usart.cpp
+++ b/usart.cpp
@@ -369,6 +369,39 @@ bool USART0::receiveByte( uint8_t &ui8Data, uint16_t ui16TimeoutMS )
 	return true;
 }
 
+//////////////////////////////////////////////////////////////////////////
+uint8_t USART0::receiveByteBlocked()
+{
+	uint8_t ui8Received;
+	while( !receiveByte( ui8Received ) );
+	return ui8Received;
+}
+
+//////////////////////////////////////////////////////////////////////////
+uint8_t USART0::receivePeek()
+{
+	uint8_t ui8Received;
+
+	if( !( SREG & ( 1 << SREG_I ) && m_vsizeRXBufferHead == m_vsizeRXBufferTail ) )
+	{
+		while( !( *m_vui8pUCSRA & ( 1 << RXC_D ) ) );
+		ui8Received = *m_vui8pUDR;
+
+		size_t sizeIndex = ( m_vsizeRXBufferHead + 1 ) % sm_sizeRXBUFFER_SIZE;
+
+		if( sizeIndex != m_vsizeRXBufferTail )
+		{
+			m_vui8aRXBuffer[m_vsizeRXBufferHead] = ui8Received;
+			m_vsizeRXBufferHead = sizeIndex;
+		}
+
+		return ui8Received;
+	}
+
+	while( m_vsizeRXBufferHead == m_vsizeRXBufferTail );
+	return m_vui8aRXBuffer[m_vsizeRXBufferTail];
+}
+
 //////////////////////////////////////////////////////////////////////////
 bool USART0::receiveLine( char *szBuffer, size_t sizeBufferLength, const char *szLineTerminator /* = "\r\n" */ )
 {
diff --git a/usart.h b/usart.h
index dfa6f31..61ed803 100644
--- a/usart.h
+++ b/usart.h
@@ -1,7 +1,7 @@
 /*
 * Copyright (c) by BlackMark 2015-2016
-* Date 25/05/2016
-* Version 3.2
+* Date 26/05/2016
+* Version 3.3
 */
 
 #ifndef USART_H
@@ -144,6 +144,8 @@ public:
 
 	bool receiveByte( uint8_t &ui8Data );
 	bool receiveByte( uint8_t &ui8Data, uint16_t ui16TimeoutMS );
+	uint8_t receiveByteBlocked();
+	uint8_t receivePeek();
 	bool receiveLine( char *szBuffer, size_t sizeBufferLength, const char *szLineTerminator = "\r\n" );
 	bool receiveLine( char *szBuffer, size_t sizeBufferLength, uint16_t ui16TimeoutMS, const char *szLineTerminator = "\r\n" );
 	void flushReceive();