diff --git a/include/items/vImpulsOut.h b/include/items/vImpulsOut.h
index 79316073..2cd806ca 100644
--- a/include/items/vImpulsOut.h
+++ b/include/items/vImpulsOut.h
@@ -17,7 +17,7 @@ class ImpulsOutClass {
    private:
     unsigned long currentMillis;
     unsigned long prevMillis;
-
+    unsigned long difference;
     unsigned long _impulsPeriod = 0;
     unsigned int _impulsCount = 0;
     unsigned int _impulsCountBuf = 0;
diff --git a/include/items/vLogging.h b/include/items/vLogging.h
index d1060334..53c098af 100644
--- a/include/items/vLogging.h
+++ b/include/items/vLogging.h
@@ -19,6 +19,7 @@ class LoggingClass {
 
     unsigned long currentMillis;
     unsigned long prevMillis;
+    unsigned long difference;
     unsigned long _period;
     unsigned int _maxPoints;
     String _loggingValueKey;
diff --git a/include/items/vSensorDallas.h b/include/items/vSensorDallas.h
index 3feeb572..2dff5f04 100644
--- a/include/items/vSensorDallas.h
+++ b/include/items/vSensorDallas.h
@@ -22,6 +22,7 @@ private:
 
     unsigned long currentMillis;
     unsigned long prevMillis;
+    unsigned long difference;
     unsigned long _interval;
     String _key;
     unsigned int _pin;
diff --git a/src/items/vImpulsOut.cpp b/src/items/vImpulsOut.cpp
index 9654cd69..f09d5756 100644
--- a/src/items/vImpulsOut.cpp
+++ b/src/items/vImpulsOut.cpp
@@ -20,7 +20,7 @@ void ImpulsOutClass::execute(unsigned long impulsPeriod, unsigned int impulsCoun
 
 void ImpulsOutClass::loop() {
     currentMillis = millis();
-    unsigned long difference = currentMillis - prevMillis;
+    difference = currentMillis - prevMillis;
     if (_impulsCountBuf > 0) {
         if (difference > _impulsPeriod) {
             _impulsCountBuf--;
diff --git a/src/items/vLogging.cpp b/src/items/vLogging.cpp
index 2958cf1c..95d1bef5 100644
--- a/src/items/vLogging.cpp
+++ b/src/items/vLogging.cpp
@@ -17,7 +17,7 @@ LoggingClass::~LoggingClass() {}
 
 void LoggingClass::loop() {
     currentMillis = millis();
-    unsigned long difference = currentMillis - prevMillis;
+    difference = currentMillis - prevMillis;
     if (difference >= _period) {
         prevMillis = millis();
         addNewDelOldData("logs/" + _key + ".txt", _maxPoints, jsonReadStr(configLiveJson, _loggingValueKey));
diff --git a/src/items/vSensorDallas.cpp b/src/items/vSensorDallas.cpp
index 323bca12..d52b8b57 100644
--- a/src/items/vSensorDallas.cpp
+++ b/src/items/vSensorDallas.cpp
@@ -20,7 +20,7 @@ SensorDallas::~SensorDallas() {}
 
 void SensorDallas::loop() {
     currentMillis = millis();
-    unsigned long difference = currentMillis - prevMillis;
+    difference = currentMillis - prevMillis;
     if (difference >= _interval) {
         prevMillis = millis();
         readDallas();