diff --git a/application.c b/application.c
index 823503e..826d8f0 100644
--- a/application.c
+++ b/application.c
@@ -1129,22 +1129,22 @@ static void command_cplug(void* argument)
 		bool gnd_any = false;
 		bool gnd_all = true;
 		bool gnd;
-		gnd = usb_cables_test_pins(&usb_pins[connector->pins[1]], &usb_pins[connector->pins[12]]); // A1- A12 GND
+		gnd = usb_cables_test_pins(&usb_pins[connector->pins[1]], &usb_pins[connector->pins[12]], NULL); // A1- A12 GND
 		gnd_any |= gnd;
 		gnd_all &= gnd;
-		gnd = usb_cables_test_pins(&usb_pins[connector->pins[1]], &usb_pins[connector->pins[12 + 1]]); // A1- B1 GND
+		gnd = usb_cables_test_pins(&usb_pins[connector->pins[1]], &usb_pins[connector->pins[12 + 1]], NULL); // A1- B1 GND
 		gnd_any |= gnd;
 		gnd_all &= gnd;
-		gnd = usb_cables_test_pins(&usb_pins[connector->pins[1]], &usb_pins[connector->pins[12 + 12]]); // A1- B12 GND
+		gnd = usb_cables_test_pins(&usb_pins[connector->pins[1]], &usb_pins[connector->pins[12 + 12]], NULL); // A1- B12 GND
 		gnd_any |= gnd;
 		gnd_all &= gnd;
-		gnd = usb_cables_test_pins(&usb_pins[connector->pins[12]], &usb_pins[connector->pins[12 + 1]]); // A12 - B1 GND
+		gnd = usb_cables_test_pins(&usb_pins[connector->pins[12]], &usb_pins[connector->pins[12 + 1]], NULL); // A12 - B1 GND
 		gnd_any |= gnd;
 		gnd_all &= gnd;
-		gnd = usb_cables_test_pins(&usb_pins[connector->pins[12]], &usb_pins[connector->pins[12 + 12]]); // A12 - B12 GND
+		gnd = usb_cables_test_pins(&usb_pins[connector->pins[12]], &usb_pins[connector->pins[12 + 12]], NULL); // A12 - B12 GND
 		gnd_any |= gnd;
 		gnd_all &= gnd;
-		gnd = usb_cables_test_pins(&usb_pins[connector->pins[12 + 1]], &usb_pins[connector->pins[12 + 12]]); // B1- B12 GND
+		gnd = usb_cables_test_pins(&usb_pins[connector->pins[12 + 1]], &usb_pins[connector->pins[12 + 12]], NULL); // B1- B12 GND
 		gnd_any |= gnd;
 		gnd_all &= gnd;
 		printf("- %s GND pins interconnected\n", gnd_all ? "all" : (gnd_any ? "some" : "no"));
@@ -1152,29 +1152,29 @@ static void command_cplug(void* argument)
 		bool vbus_any = false;
 		bool vbus_all = true;
 		bool vbus;
-		vbus = usb_cables_test_pins(&usb_pins[connector->pins[4]], &usb_pins[connector->pins[9]]); // A4- A9 VBUS
+		vbus = usb_cables_test_pins(&usb_pins[connector->pins[4]], &usb_pins[connector->pins[9]], NULL); // A4- A9 VBUS
 		vbus_any |= vbus;
 		vbus_all &= vbus;
-		vbus = usb_cables_test_pins(&usb_pins[connector->pins[4]], &usb_pins[connector->pins[12 + 4]]); // A4- B4 VBUS
+		vbus = usb_cables_test_pins(&usb_pins[connector->pins[4]], &usb_pins[connector->pins[12 + 4]], NULL); // A4- B4 VBUS
 		vbus_any |= vbus;
 		vbus_all &= vbus;
-		vbus = usb_cables_test_pins(&usb_pins[connector->pins[4]], &usb_pins[connector->pins[12 + 9]]); // A4- B9 VBUS
+		vbus = usb_cables_test_pins(&usb_pins[connector->pins[4]], &usb_pins[connector->pins[12 + 9]], NULL); // A4- B9 VBUS
 		vbus_any |= vbus;
 		vbus_all &= vbus;
-		vbus = usb_cables_test_pins(&usb_pins[connector->pins[9]], &usb_pins[connector->pins[12 + 4]]); // A9 - B4 VBUS
+		vbus = usb_cables_test_pins(&usb_pins[connector->pins[9]], &usb_pins[connector->pins[12 + 4]], NULL); // A9 - B4 VBUS
 		vbus_any |= vbus;
 		vbus_all &= vbus;
-		vbus = usb_cables_test_pins(&usb_pins[connector->pins[9]], &usb_pins[connector->pins[12 + 9]]); // A9 - B9 VBUS
+		vbus = usb_cables_test_pins(&usb_pins[connector->pins[9]], &usb_pins[connector->pins[12 + 9]], NULL); // A9 - B9 VBUS
 		vbus_any |= vbus;
 		vbus_all &= vbus;
-		vbus = usb_cables_test_pins(&usb_pins[connector->pins[12 + 4]], &usb_pins[connector->pins[12 + 9]]); // B4- B9 VBUS
+		vbus = usb_cables_test_pins(&usb_pins[connector->pins[12 + 4]], &usb_pins[connector->pins[12 + 9]], NULL); // B4- B9 VBUS
 		vbus_any |= vbus;
 		vbus_all &= vbus;
 		printf("- %s VBUS pins interconnected\n", vbus_all ? "all" : (vbus_any ? "some" : "no"));
 		// check if it is a powered cable (VCONN is connected to ground by Ra), or connected to sink
-		bool cc1 = usb_cables_test_pins(&usb_pins[connector->pins[5]], &usb_pins[connector->pins[12 + 1]]); // A5 CC1 - A1 GND
+		bool cc1 = usb_cables_test_pins(&usb_pins[connector->pins[5]], &usb_pins[connector->pins[12 + 1]], NULL); // A5 CC1 - A1 GND
 		printf("- CC1 %sconnected to GND\n", cc1 ? "" : "not ");
-		bool cc2 = usb_cables_test_pins(&usb_pins[connector->pins[12 + 5]], &usb_pins[connector->pins[12 + 1]]); // B5 CC1 - A1 GND
+		bool cc2 = usb_cables_test_pins(&usb_pins[connector->pins[12 + 5]], &usb_pins[connector->pins[12 + 1]], NULL); // B5 CC1 - A1 GND
 		printf("- CC2 %sconnected to GND\n", cc2 ? "" : "not ");
 /*
 		if (cc1 >= 0x41) {
@@ -1194,9 +1194,9 @@ static void command_cplug(void* argument)
 		}
 */
 		// check if it should be connected to a source
-		cc1 = usb_cables_test_pins(&usb_pins[connector->pins[5]], &usb_pins[connector->pins[4]]); // A5 CC1 - A4 VBUS
+		cc1 = usb_cables_test_pins(&usb_pins[connector->pins[5]], &usb_pins[connector->pins[4]], NULL); // A5 CC1 - A4 VBUS
 		printf("- CC1 %sconnected to VBUS\n", cc1 ? "" : "not ");
-		cc2 = usb_cables_test_pins(&usb_pins[connector->pins[12 + 5]], &usb_pins[connector->pins[4]]); // B5 CC1 - A1 VBUS
+		cc2 = usb_cables_test_pins(&usb_pins[connector->pins[12 + 5]], &usb_pins[connector->pins[4]], NULL); // B5 CC1 - A1 VBUS
 		printf("- CC2 %sconnected to VBUS\n", cc2 ? "" : "not ");
 		if (cc1 || cc2) {
 			puts("- this cable is to be connected to a source on the other end (A plug)\n");
@@ -1211,13 +1211,13 @@ static void command_cplug(void* argument)
 	}
 	puts("cable interconnection\n");
 	bool conn;
-	conn = usb_cables_test_pins(&usb_pins[c1->pins[5]], &usb_pins[c2->pins[5]]); // A5 CC1 - A5 CC1
+	conn = usb_cables_test_pins(&usb_pins[c1->pins[5]], &usb_pins[c2->pins[5]], NULL); // A5 CC1 - A5 CC1
 	printf("- CC1 %sconnected to CC1\n", conn ? "" : "not ");
-	conn = usb_cables_test_pins(&usb_pins[c1->pins[5]], &usb_pins[c2->pins[12 + 5]]); // A5 CC1 - B5 CC2
+	conn = usb_cables_test_pins(&usb_pins[c1->pins[5]], &usb_pins[c2->pins[12 + 5]], NULL); // A5 CC1 - B5 CC2
 	printf("- CC1 %sconnected to CC2\n", conn ? "" : "not ");
-	conn = usb_cables_test_pins(&usb_pins[c1->pins[12 + 5]], &usb_pins[c2->pins[5]]); // B5 CC2 - A5 CC1
+	conn = usb_cables_test_pins(&usb_pins[c1->pins[12 + 5]], &usb_pins[c2->pins[5]], NULL); // B5 CC2 - A5 CC1
 	printf("- CC2 %sconnected to CC1\n", conn ? "" : "not ");
-	conn = usb_cables_test_pins(&usb_pins[c1->pins[12 + 5]], &usb_pins[c2->pins[12 + 5]]); // B5 CC2 - B5 CC2
+	conn = usb_cables_test_pins(&usb_pins[c1->pins[12 + 5]], &usb_pins[c2->pins[12 + 5]], NULL); // B5 CC2 - B5 CC2
 	printf("- CC2 %sconnected to CC2\n", conn ? "" : "not ");
 }
 
diff --git a/usb_cables.c b/usb_cables.c
index 5d2628f..fd99cf6 100644
--- a/usb_cables.c
+++ b/usb_cables.c
@@ -4994,7 +4994,7 @@ const struct usb_connector_t* usb_cables_get_connector(uint8_t pin)
 	return NULL;
 }
 
-bool usb_cables_test_pins(const struct usb_pin_t* pin1, const struct usb_pin_t* pin2)
+bool usb_cables_test_pins(const struct usb_pin_t* pin1, const struct usb_pin_t* pin2, struct usb_connection_t* connection)
 {
 	cm3_assert(pin1);
 	cm3_assert(pin2);
@@ -5136,7 +5136,7 @@ bool usb_cables_test_pins(const struct usb_pin_t* pin1, const struct usb_pin_t*
 	// summarize connection
 	bool connected = true;
 	if (USB_PIN_TYPE_GROUND == pin1->type || USB_PIN_TYPE_SHIELD == pin1->type) {
-		connected &= _connection.tx_pull_float; 
+		connected &= _connection.tx_pull_float;
 	} else { // not a ground pin
 		connected &= _connection.tx_drive_float | _connection.tx_drive_pull;
 	}
@@ -5146,6 +5146,10 @@ bool usb_cables_test_pins(const struct usb_pin_t* pin1, const struct usb_pin_t*
 		connected &= _connection.rx_drive_float | _connection.rx_drive_pull;
 	}
 
+	// return connection details
+	if (connection) {
+		memcpy(connection, &_connection, sizeof(struct usb_connection_t));
+	}
 	return connected;
 }
 
@@ -5317,7 +5321,7 @@ bool usb_cables_test_cable(const struct usb_cable_t* cable, uint8_t* defined, ui
 						}
 					}
 
-					const bool connection = usb_cables_test_pins(usb_pin_from, usb_pin_to);
+					const bool connection = usb_cables_test_pins(usb_pin_from, usb_pin_to, NULL);
 					if (connection) {
 						if (pair_defined) {
 							_defined++;
@@ -5416,7 +5420,7 @@ uint8_t** usb_cables_test_connections(const struct usb_connector_t** connectors,
 					}
 
 					// test connection
-					const bool connected = usb_cables_test_pins(usb_pin_from, usb_pin_to);
+					const bool connected = usb_cables_test_pins(usb_pin_from, usb_pin_to, NULL);
 					if (connected) {
 						if (UINT16_MAX == (*connections_nb)) { // we already found the maximum of connections
 							return (uint8_t**)connections;
diff --git a/usb_cables.h b/usb_cables.h
index 7326024..516c85a 100644
--- a/usb_cables.h
+++ b/usb_cables.h
@@ -224,9 +224,10 @@ const struct usb_connector_t* usb_cables_get_connector(uint8_t pin);
 /** test if two pins are connected
  *  @param[in] pin1 first pin
  *  @param[in] pin2 second pin
+ *  @param[out] connection pins interconnection details (optional)
  *  @return if the two pins are connected
  */
-bool usb_cables_test_pins(const struct usb_pin_t* pin1, const struct usb_pin_t* pin2);
+bool usb_cables_test_pins(const struct usb_pin_t* pin1, const struct usb_pin_t* pin2, struct usb_connection_t* connection);
 /** test connectors for connections between ground pins of the connectors
  *  @param[in] connectors connectors to test
  *  @param[in] connectors_nb numbers of connectors