diff --git a/application.c b/application.c
index 56e4e45..9fb35bf 100644
--- a/application.c
+++ b/application.c
@@ -1401,6 +1401,21 @@ void main(void)
 	uint32_t last_connect_time = rtc_get_counter_val(); // last time a USB cable has been connected/disconnected
 	bool interactive = false; // if there is user activity on the serial port
 	bool action = false; // if an action has been performed don't go to sleep
+
+	struct cable_t* cable_current = calloc(1, sizeof(struct cable_t)); // to store the currently detected cable
+	if (NULL == cable_current) {
+		printf("EOMEM\n");
+		while (true);
+	}
+	cable_clear(cable_current); // initialize rest of cable structure
+	struct cable_t* cable_next = calloc(1, sizeof(struct cable_t)); // to store the next detected cable
+	if (NULL == cable_next) {
+		printf("EOMEM\n");
+		while (true);
+	}
+	cable_clear(cable_next); // initialize rest of cable structure
+	bool cable_changed = false; // if the next cable is not the same as the current
+
 	while (true) { // infinite loop
 		iwdg_reset(); // kick the dog
 		if (user_input_available) { // user input is available
@@ -1420,6 +1435,74 @@ void main(void)
 		if (rtc_internal_tick_flag) { // the internal RTC ticked
 			rtc_internal_tick_flag = false; // reset flag
 			action = true; // action has been performed
+			if (!interactive) { // periodically check cable when not in interactive mode
+
+				// start cable detection
+				cable_clear(cable_next); // clear definition
+				cable_detect(cable_next); // detect connected connectors
+				if (NULL == cable_next->connections && cable_next->connections_nb > 0) {
+					printf("EOMEM\n");
+					while (true);
+				}
+				// if there is a cable, we need to identify it further
+				if (0 != cable_next->connections_nb) {
+					cable_connectors(cable_next); // first identify the connectors
+					cable_cables(cable_next); // find cables with matching connector set
+					cable_issues_nb(cable_next); // calculate score for cables (updates the connections)
+					if (NULL == cable_next->connections || 0 == cable_next->connections_nb) {
+						printf("EOMEM\n");
+						while (true);
+					}
+				}
+				// compare next to current cable
+				if (cable_current->connections_nb != cable_next->connections_nb) {
+					cable_changed = true; // note it changed, but don't do anything until change is confirmed a second time
+				} else { // same number of connections
+					bool match = true;
+					for (uint16_t i = 0; i < cable_current->connections_nb && i < cable_next->connections_nb && match; i++) {
+						if (cable_current->connections[i][0] != cable_next->connections[i][0] || cable_current->connections[i][1] != cable_next->connections[i][1]) {
+							match = false;
+						}
+					}
+					if (!match) { // not the same connections
+						cable_changed = true;
+					} else if (cable_changed) { // it's the same cable, and it has been confirmed a second time
+						cable_changed = false; // remember it's the same cable
+						if (0 == cable_current->connections_nb) { // no cable plugged in
+							lcd_hd44780_clear_display(); // be sure the display is cleared
+							lcd_hd44780_write_line(false, lcd_default_line1, strlen(lcd_default_line1));
+							lcd_hd44780_write_line(true, lcd_default_line2, strlen(lcd_default_line2));
+						} else { // there is a new confirmed cable
+							cable_load(cable_next); // check if there is a load
+							cable_issues(cable_next); // get the exact issues
+							lcd_hd44780_clear_display(); // clear display
+							if (cable_next->cable_best < LENGTH(usb_cables) && cable_next->cable_best < LENGTH(cable_next->unconnected_nb) && cable_next->cable_best < LENGTH(cable_next->unspecified_nb)) {
+								const struct usb_cable_t* usb_cable = &usb_cables[cable_next->cable_best];
+								lcd_hd44780_write_line(false, usb_cable->name, strlen(usb_cable->name));
+								uint16_t issues = cable_next->unconnected_nb[cable_next->cable_best] + cable_next->unspecified_nb[cable_next->cable_best];
+								if (0 == issues) {
+									lcd_hd44780_write_line(true, "perfect match", 13);
+								} else {
+									char score_str[17];
+									uint8_t str_len = snprintf(score_str, LENGTH(score_str), "issues: %u", issues);
+									if (str_len) {
+										lcd_hd44780_write_line(true, score_str, str_len);
+									}
+								}
+							} else {
+								lcd_hd44780_write_line(false, "no matching", 11);
+								lcd_hd44780_write_line(true, "cable found", 11);
+							}
+						}
+					} else { // the cable did not change
+						// nothing to do, wait for cable change
+					}
+				}
+				// next cable because the current one (reuse allocated current for the next)
+				struct cable_t* cable_tmp = cable_current;
+				cable_current = cable_next;
+				cable_next = cable_tmp;
+			} // !interactive
 			while (!interactive && rtc_get_counter_val() >= last_connect_time + SHUTDOWN_TIMEOUT) { // time to shut down
 #if !DEBUG
 				BKP_DR1 = 0x22; // indicate we want to stay in standby mode (it's not possible to disable the independent watchdog and it will reset the system even in standby mode