diff --git a/firmware/libcommon/include/ringbuffer.h b/firmware/libcommon/include/ringbuffer.h
index 51af3b2c..99fe96b3 100644
--- a/firmware/libcommon/include/ringbuffer.h
+++ b/firmware/libcommon/include/ringbuffer.h
@@ -32,4 +32,22 @@ int rbuf_write(volatile ringbuf * rb, uint8_t item);
 bool rbuf_is_empty(volatile ringbuf * rb);
 bool rbuf_is_full(volatile ringbuf * rb);
 
+
+/* same as above but with 16bit values instead of 8bit */
+
+#define RING16_BUFLEN 512
+
+typedef struct ringbuf16 {
+	uint16_t buf[RING16_BUFLEN];
+	size_t ird;
+	size_t iwr;
+} ringbuf16;
+
+void rbuf16_reset(volatile ringbuf16 * rb);
+uint16_t rbuf16_read(volatile ringbuf16 * rb);
+uint16_t rbuf16_peek(volatile ringbuf16 * rb);
+int rbuf16_write(volatile ringbuf16 * rb, uint16_t item);
+bool rbuf16_is_empty(volatile ringbuf16 * rb);
+bool rbuf16_is_full(volatile ringbuf16 * rb);
+
 #endif /* end of include guard: SIMTRACE_RINGBUF_H */
diff --git a/firmware/libcommon/source/ringbuffer.c b/firmware/libcommon/source/ringbuffer.c
index 591d31f3..d3690be5 100644
--- a/firmware/libcommon/source/ringbuffer.c
+++ b/firmware/libcommon/source/ringbuffer.c
@@ -28,6 +28,16 @@ void rbuf_reset(volatile ringbuf * rb)
 	local_irq_restore(state);
 }
 
+void rbuf16_reset(volatile ringbuf16 * rb)
+{
+	unsigned long state;
+
+	local_irq_save(state);
+	rb->ird = 0;
+	rb->iwr = 0;
+	local_irq_restore(state);
+}
+
 uint8_t rbuf_read(volatile ringbuf * rb)
 {
 	unsigned long state;
@@ -41,21 +51,49 @@ uint8_t rbuf_read(volatile ringbuf * rb)
 	return val;
 }
 
+uint16_t rbuf16_read(volatile ringbuf16 * rb)
+{
+	unsigned long state;
+	uint16_t val;
+
+	local_irq_save(state);
+	val = rb->buf[rb->ird];
+	rb->ird = (rb->ird + 1) % RING16_BUFLEN;
+	local_irq_restore(state);
+
+	return val;
+}
+
 uint8_t rbuf_peek(volatile ringbuf * rb)
 {
 	return rb->buf[rb->ird];
 }
 
+uint16_t rbuf16_peek(volatile ringbuf16 * rb)
+{
+	return rb->buf[rb->ird];
+}
+
 bool rbuf_is_empty(volatile ringbuf * rb)
 {
 	return rb->ird == rb->iwr;
 }
 
+bool rbuf16_is_empty(volatile ringbuf16 * rb)
+{
+	return rb->ird == rb->iwr;
+}
+
 static bool __rbuf_is_full(volatile ringbuf * rb)
 {
 	return rb->ird == (rb->iwr + 1) % RING_BUFLEN;
 }
 
+static bool __rbuf16_is_full(volatile ringbuf16 * rb)
+{
+	return rb->ird == (rb->iwr + 1) % RING16_BUFLEN;
+}
+
 bool rbuf_is_full(volatile ringbuf * rb)
 {
 	unsigned long state;
@@ -68,6 +106,18 @@ bool rbuf_is_full(volatile ringbuf * rb)
 	return rc;
 }
 
+bool rbuf16_is_full(volatile ringbuf16 * rb)
+{
+	unsigned long state;
+	bool rc;
+
+	local_irq_save(state);
+	rc = rb->ird == (rb->iwr + 1) % RING16_BUFLEN;
+	local_irq_restore(state);
+
+	return rc;
+}
+
 int rbuf_write(volatile ringbuf * rb, uint8_t item)
 {
 	unsigned long state;
@@ -84,4 +134,18 @@ int rbuf_write(volatile ringbuf * rb, uint8_t item)
 	}
 }
 
+int rbuf16_write(volatile ringbuf16 * rb, uint16_t item)
+{
+	unsigned long state;
 
+	local_irq_save(state);
+	if (!__rbuf16_is_full(rb)) {
+		rb->buf[rb->iwr] = item;
+		rb->iwr = (rb->iwr + 1) % RING16_BUFLEN;
+		local_irq_restore(state);
+		return 0;
+	} else {
+		local_irq_restore(state);
+		return -1;
+	}
+}
diff --git a/firmware/libcommon/source/sniffer.c b/firmware/libcommon/source/sniffer.c
index 153c4839..bea4d95a 100644
--- a/firmware/libcommon/source/sniffer.c
+++ b/firmware/libcommon/source/sniffer.c
@@ -138,7 +138,7 @@ static struct Usart_info sniff_usart = {
 	.state = USART_RCV,
 };
 /*! Ring buffer to store sniffer communication data */
-static struct ringbuf sniff_buffer;
+static struct ringbuf16 sniff_buffer;
 
 /* Flags  to know is the card status changed (see SIMTRACE_MSGT_DT_SNIFF_CHANGE flags) */
 static volatile uint32_t change_flags = 0;
@@ -291,7 +291,7 @@ static void change_state(enum iso7816_3_sniff_state iso_state_new)
 		update_wt(10, 1, "RESET"); /* reset WT time-out */
 		break;
 	case ISO7816_S_WAIT_ATR:
-		rbuf_reset(&sniff_buffer); /* reset buffer for new communication */
+		rbuf16_reset(&sniff_buffer); /* reset buffer for new communication */
 		break;
 	case ISO7816_S_IN_ATR:
 		g_atr.atr_i = 0;
@@ -835,7 +835,7 @@ void Sniffer_usart_isr(void)
 		/* Reset WT timer */
 		wt_remaining = g_wt;
 		/* Store sniffed data into buffer (also clear interrupt */
-		if (rbuf_write(&sniff_buffer, byte) != 0)
+		if (rbuf16_write(&sniff_buffer, byte) != 0)
 			TRACE_ERROR("USART buffer full\n\r");
 	}
 
@@ -941,7 +941,7 @@ void Sniffer_init(void)
 	PIO_EnableIt(&pin_rst);
 
 	/* Clear ring buffer containing the sniffed data */
-	rbuf_reset(&sniff_buffer);
+	rbuf16_reset(&sniff_buffer);
 	/* Configure USART to as ISO-7816 slave communication to sniff communication */
 	ISO7816_Init(&sniff_usart, CLK_SLAVE);
 	/* Only receive data when sniffing */
@@ -1007,8 +1007,8 @@ void Sniffer_run(void)
 	 * is remaining
 	 */
 	/* Handle sniffed data */
-	if (!rbuf_is_empty(&sniff_buffer)) { /* use if instead of while to let the main loop restart the watchdog */
-		uint8_t byte = rbuf_read(&sniff_buffer);
+	if (!rbuf16_is_empty(&sniff_buffer)) { /* use if instead of while to let the main loop restart the watchdog */
+		uint8_t byte = rbuf16_read(&sniff_buffer);
 		/* Convert convention if required */
 		if (convention_convert) {
 			byte = convention_convert_lut[byte];