diff --git a/main.c b/main.c
index 4e08911..4a0706f 100644
--- a/main.c
+++ b/main.c
@@ -371,7 +371,7 @@ int main(void)
 #endif
 
 	// setup RTC
-	rtc_auto_awake(RCC_LSE, 32768/TICKS_PER_SECOND-1); // ensure RTC is on, uses the 32.678 kHz LSE, and the prescale is set to our tick speed, else update backup registers accordingly
+	rtc_auto_awake(RCC_LSE, 32768/ticks_second-1); // ensure RTC is on, uses the 32.678 kHz LSE, and the prescale is set to our tick speed, else update backup registers accordingly
 	rtc_interrupt_enable(RTC_SEC); // enable RTC interrupt on "seconds"
 	nvic_enable_irq(NVIC_RTC_IRQ); // allow the RTC to interrupt
 
@@ -455,6 +455,11 @@ int main(void)
 	printf("current time: %02lu:%02lu:%02lu\n", rtc_get_counter_val()/ticks_hour, (rtc_get_counter_val()%ticks_hour)/ticks_minute, (rtc_get_counter_val()%ticks_minute)/ticks_second); // display time
 	clock_animate_time(rtc_get_counter_val()); // set time with animation
 
+
+	printf("ticks/s: %lu (%d)\n",ticks_second, TICKS_PER_SECOND);
+	printf("RTC prescale set: %lu\n",32768/ticks_second-1);
+	//printf("RTC prescale get: %lu\n",rtc_get_prescale_div_val());
+
 	printf("input commands\n");
 	bool action = false; // if an action has been performed don't go to sleep
 	button_flag = false; // reset button flag
@@ -502,6 +507,7 @@ int main(void)
 				adc_start_conversion_regular(ADC1); // start measuring ambient luminosity
 			}
 			if ((rtc_get_counter_val()%ticks_second)==0) { // one second passed
+				//printf("ticks: %lu\n", rtc_get_counter_val());
 				led_toggle(); // LED activity to show we are not stuck
 			}
 			if ((rtc_get_counter_val()%ticks_minute)==0) { // one minute passed