diff --git a/src/gbmanager.cpp b/src/gbmanager.cpp
index 5790264..b116494 100644
--- a/src/gbmanager.cpp
+++ b/src/gbmanager.cpp
@@ -2,9 +2,9 @@
 #include <iostream>
 #include <sstream>
 
+#include "../modules/pico-onewire/api/one_wire.h"
 #include "hardware/i2c.h"
 #include "pico/stdlib.h"
-#include "../modules/pico-onewire/api/one_wire.h"
 
 #include "config.h"
 #include "ds18b20.h"
@@ -55,7 +55,8 @@ int main() {
     sleep_ms(3000);
 
     while (true) {
-        int duration = oneWire.convert_temperature(address, true, false);
+        absolute_time_t start = get_absolute_time();
+        oneWire.convert_temperature(address, true, false);
         temp_act = oneWire.temperature(address);
 
         if (isSystemOn && temp_act < temp_tgt - temp_diff) {
@@ -78,8 +79,13 @@ int main() {
 
         myLCD.setCursor(0, 0);
         myLCD.sendString(lcdText.str());
-        if (duration > 0 && duration <= 1000) {
-            sleep_ms(1000 - duration);
-        }
+
+        absolute_time_t stop = get_absolute_time();
+
+        int64_t duration_ms = absolute_time_diff_us(start, stop) / 1000;
+        int64_t timeToSleep = 1000 - duration_ms;
+
+        if (timeToSleep > 0)
+            sleep_ms(timeToSleep);
     }
 }
\ No newline at end of file