diff --git a/stm-firmware/include/reflow-controller/rotary-encoder.h b/stm-firmware/include/reflow-controller/rotary-encoder.h
index a82e8e8..706cb32 100644
--- a/stm-firmware/include/reflow-controller/rotary-encoder.h
+++ b/stm-firmware/include/reflow-controller/rotary-encoder.h
@@ -39,4 +39,6 @@ int32_t rotary_encoder_get_change_val(void);
 
 void rotary_encoder_stop(void);
 
+void rotary_encoder_zero(void);
+
 #endif /* __ROTARY_ENCODER_H__ */
diff --git a/stm-firmware/main.c b/stm-firmware/main.c
index 623558e..312551e 100644
--- a/stm-firmware/main.c
+++ b/stm-firmware/main.c
@@ -224,6 +224,8 @@ int main()
 	pid_init(&pid, 0.1, 0.1, 4.0, 0.0, 100.0, 40.0, 0.25);
 	pid_zero(&pid);
 
+	snprintf(&disp[2][0], 17, "  \xBC\xCF\xAF\xC0 Reflow");
+
 	while (1) {
 		sd_card_mounted = mount_sd_card_if_avail(sd_card_mounted);
 
@@ -249,7 +251,7 @@ int main()
 			else
 				led_set(0, 0);
 
-			snprintf(&disp[3][0], 17, "Temp: %s%.1f C", (temp_status == 0 ? "" : temp_status < 0 ? "<" : ">")
+			snprintf(&disp[3][0], 17, "Temp: %s%.1f ""\xDF""C", (temp_status == 0 ? "" : temp_status < 0 ? "<" : ">")
 					, current_temp);
 		}
 
@@ -266,14 +268,21 @@ int main()
 		}
 
 		button = button_read_event();
+
+		if (button == BUTTON_SHORT_RELEASED) {
+			rotary_encoder_zero();
+		} else if (button == BUTTON_LONG_RELEASED) {
+			adc_pt1000_clear_error();
+		}
+
+
 		rot = rotary_encoder_get_abs_val();
 
 		oven_driver_set_power(rot > 100U ? 100U : rot);
 
 
 		/* TODO: handle gui */
-		snprintf(&disp[1][0], 17, "Rotary: %u", (unsigned int)rot);
-		snprintf(&disp[2][0], 17, "Button: %s", (button == BUTTON_SHORT ? "SHORT" : (button == BUTTON_LONG ? "LONG" : "")));
+		snprintf(&disp[1][0], 17, "Rot: %u %s", (unsigned int)rot, (button == BUTTON_SHORT ? "SHORT" : (button == BUTTON_LONG ? "LONG" : "")));
 
 		handle_shell_uart_input(shell_handle);
 
diff --git a/stm-firmware/rotary-encoder.c b/stm-firmware/rotary-encoder.c
index 6b7c1a4..d079b50 100644
--- a/stm-firmware/rotary-encoder.c
+++ b/stm-firmware/rotary-encoder.c
@@ -83,3 +83,8 @@ void rotary_encoder_stop(void)
 	rcc_manager_disable_clock(&RCC->APB1ENR, BITMASK_TO_BITNO(ROTARY_ENCODER_TIMER_RCC_MASK));
 	rcc_manager_disable_clock(&RCC->AHB1ENR, BITMASK_TO_BITNO(ROTARY_ENCODER_RCC_MASK));
 }
+
+void rotary_encoder_zero(void)
+{
+	ROTARY_ENCODER_TIMER->CNT = 0UL;
+}