diff --git a/sam3s_example/simtrace/sniffer.c b/sam3s_example/simtrace/sniffer.c
new file mode 100644
index 00000000..78fc6092
--- /dev/null
+++ b/sam3s_example/simtrace/sniffer.c
@@ -0,0 +1,171 @@
+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2009, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+/*------------------------------------------------------------------------------
+ *          Headers
+ *------------------------------------------------------------------------------*/
+
+#include "board.h"
+
+#include <string.h>
+
+/*------------------------------------------------------------------------------
+ *         Internal definitions
+ *------------------------------------------------------------------------------*/
+
+/** Maximum ucSize in bytes of the smartcard answer to a command.*/
+#define MAX_ANSWER_SIZE         10
+
+/** Maximum ATR ucSize in bytes.*/
+#define MAX_ATR_SIZE            55
+
+/* Sniffer configuration */
+#ifdef PIN_SC_SW
+#undef PIN_SC_SW
+#endif
+#define PIN_SC_SW               {PIO_PA20, PIOA, ID_PIOA, PIO_OUTPUT_0, PIO_DEFAULT}
+
+#ifdef PIN_IO_SW
+#undef PIN_IO_SW
+#endif
+#define PIN_IO_SW               {PIO_PA19, PIOA, ID_PIOA, PIO_OUTPUT_0, PIO_DEFAULT}
+
+#define PINS_BUS                PIN_SC_SW, PIN_IO_SW
+
+#define PINS_SIM_SNIFF_SIM      PIN_PHONE_IO,  PIN_PHONE_CLK
+
+/*------------------------------------------------------------------------------
+ *         Internal variables
+ *------------------------------------------------------------------------------*/
+/** ISO7816 pins */
+static const Pin pinsISO7816_sniff[]    = {PINS_SIM_SNIFF_SIM};
+static const Pin pins_bus[]    = {PINS_BUS};
+static const Pin pPwr[] = {
+    /* Enable power converter 4.5-6V to 3.3V; low: off */
+    {SIM_PWEN, PIOA, ID_PIOA, PIO_OUTPUT_0, PIO_DEFAULT},
+    
+    /* Enable second power converter: VCC_PHONE to VCC_SIM; high: off */
+    {VCC_FWD, PIOA, ID_PIOA, PIO_OUTPUT_1, PIO_DEFAULT}
+};
+
+uint32_t char_stat = 0;
+uint8_t rcvdChar = 0;
+
+/*-----------------------------------------------------------------------------
+ *          Interrupt routines
+ *-----------------------------------------------------------------------------*/
+/* 
+ *  Initializes rcvdChar with the char received on USART interface
+ *  char_stat is zero if no error occured. 
+ *  Otherwise it is filled with the content of the status register.
+ */
+void USART1_IrqHandler( void )
+{
+    uint32_t stat;
+    char_stat = 0;
+    // Rcv buf full
+/*    if((stat & US_CSR_RXBUFF) == US_CSR_RXBUFF) {
+        TRACE_DEBUG("Rcv buf full");
+        USART_DisableIt(USART1, US_IDR_RXBUFF);
+    }
+*/
+    uint32_t csr = USART_PHONE->US_CSR;
+
+    if (csr & US_CSR_TXRDY) {
+        /* transmit buffer empty, nothing to transmit */
+    } 
+    if (csr & US_CSR_RXRDY) {
+        stat = (csr&(US_CSR_OVRE|US_CSR_FRAME|
+                        US_CSR_PARE|US_CSR_TIMEOUT|US_CSR_NACK|
+                        (1<<10)));
+
+        if (stat == 0 ) {
+            /* Get a char */
+            rcvdChar = ((USART_PHONE->US_RHR) & 0xFF);
+        } /* else: error occured */
+        char_stat = stat;
+    }
+}
+
+/** Initializes a ISO driver
+ *  \param pPinIso7816RstMC Pin ISO 7816 Rst MC
+ */
+void _ISO7816_Init( )
+{
+    TRACE_DEBUG("ISO_Init\n\r");
+
+    USART_Configure( USART_PHONE,
+                     US_MR_USART_MODE_IS07816_T_0
+// Nope, we aren't master:   
+ //                    | US_MR_USCLKS_MCK
+                     | US_MR_USCLKS_SCK
+                     | US_MR_NBSTOP_1_BIT
+                     | US_MR_PAR_EVEN
+                     | US_MR_CHRL_8_BIT
+                     | US_MR_CLKO   /** TODO: This field was set in the original simtrace firmware..why? */
+                     | (3<<24), /* MAX_ITERATION */
+                     1,
+                     0);
+    /* 
+    SYNC = 0 (async mode)
+    OVER = 0 (oversampling by 8?)
+    FIDI = 372 (default val on startup before other value is negotiated)
+    USCLKS = 3 (Select SCK as input clock) --> US_MR_USCLKS_SCK
+    CD = 1 ?    --> US_BRGR_CD(1)
+    */
+    USART_PHONE->US_FIDI = 372; 
+    USART_PHONE->US_BRGR = US_BRGR_CD(1);
+//    USART_PHONE->US_BRGR = BOARD_MCK / (372*9600);
+    USART_PHONE->US_TTGR = 5;
+
+    /* Configure USART */
+    PMC_EnablePeripheral(ID_USART_PHONE);
+
+    USART1->US_IDR = 0xffffffff;
+    USART_EnableIt( USART1, US_IER_RXRDY) ;
+    /* enable USART1 interrupt */
+    NVIC_EnableIRQ( USART1_IRQn ) ;
+    
+//    USART_PHONE->US_IER = US_IER_RXRDY | US_IER_OVRE | US_IER_FRAME | US_IER_PARE | US_IER_NACK | US_IER_ITER;
+
+    USART_SetReceiverEnabled(USART_PHONE, 1);
+
+}
+
+void Sniffer_Init( void ) 
+{
+    /*  Configure ISO7816 driver */
+    PIO_Configure( pinsISO7816_sniff, PIO_LISTSIZE( pinsISO7816_sniff ) ) ;
+    PIO_Configure( pins_bus, PIO_LISTSIZE( pins_bus) ) ;
+    
+    PIO_Configure(pPwr, PIO_LISTSIZE( pPwr ));
+
+    _ISO7816_Init( );
+
+}