diff --git a/examples/OneOpenAir/OneOpenAir.ino b/examples/OneOpenAir/OneOpenAir.ino
index bc272d9..b6ac178 100644
--- a/examples/OneOpenAir/OneOpenAir.ino
+++ b/examples/OneOpenAir/OneOpenAir.ino
@@ -95,7 +95,6 @@ static bool ledBarButtonTest = false;
 static void boardInit(void);
 static void failedHandler(String msg);
 static void configurationUpdateSchedule(void);
-static void executeCo2Calibration(void);
 static void appLedHandler(void);
 static void appDispHandler(void);
 static void oledDisplayLedBarSchedule(void);
@@ -104,7 +103,6 @@ static void updatePm(void);
 static void sendDataToServer(void);
 static void tempHumUpdate(void);
 static void co2Update(void);
-static void showNr(void);
 static void mdnsInit(void);
 static void createMqttTask(void);
 static void initMqtt(void);
@@ -478,6 +476,8 @@ static void oneIndoorInit(void) {
   ag->watchdog.begin();
 
   /** Init sensor SGP41 */
+  ag->sgp41.setNoxLearningOffset(configuration.getNoxLearningOffset());
+  ag->sgp41.setTvocLearningOffset(configuration.getTvocLearningOffset());
   if (ag->sgp41.begin(Wire) == false) {
     Serial.println("SGP41 sensor not found");
     configuration.hasSensorSGP = false;
@@ -562,6 +562,8 @@ static void openAirInit(void) {
     serial1Available = false;
   }
 
+  ag->sgp41.setNoxLearningOffset(configuration.getNoxLearningOffset());
+  ag->sgp41.setTvocLearningOffset(configuration.getTvocLearningOffset());
   if (ag->sgp41.begin(Wire) == false) {
     configuration.hasSensorSGP = false;
     Serial.println("SGP sensor not found");
@@ -669,6 +671,23 @@ static void configUpdateHandle() {
     initMqtt();
   }
 
+  if (configuration.noxLearnOffsetChanged() ||
+      configuration.tvocLearnOffsetChanged()) {
+    ag->sgp41.end();
+    Serial.println("nox/tvoc learning offset changed");
+    Serial.println("noxLearningOffset: " + String(configuration.getNoxLearningOffset()));
+    Serial.println("tvocLearningOffset: " + String(configuration.getTvocLearningOffset()));
+    ag->sgp41.setNoxLearningOffset(configuration.getNoxLearningOffset());
+    ag->sgp41.setTvocLearningOffset(configuration.getTvocLearningOffset());
+    if (ag->sgp41.begin(Wire)) {
+      Serial.println("Init SGP41 success");
+      configuration.hasSensorSGP = true;
+    } else {
+      Serial.println("Init SGP41 failuire");
+      configuration.hasSensorSGP = false;
+    }
+  }
+
   appDispHandler();
   appLedHandler();
 }
diff --git a/src/AgConfigure.cpp b/src/AgConfigure.cpp
index 9b8b374..91485a0 100644
--- a/src/AgConfigure.cpp
+++ b/src/AgConfigure.cpp
@@ -403,6 +403,7 @@ bool Configuration::parse(String data, bool isLocal) {
     int tvocLearningOffset = root["tvocLearningOffset"];
     if (tvocLearningOffset != config.tvocLearningOffset) {
       changed = true;
+      _tvocLearningOffsetChanged = true;
       config.tvocLearningOffset = tvocLearningOffset;
       logInfo("Set tvocLearningOffset: " + String(tvocLearningOffset));
     }
@@ -418,6 +419,7 @@ bool Configuration::parse(String data, bool isLocal) {
     int noxLearningOffset = root["noxLearningOffset"];
     if (noxLearningOffset != config.noxLearningOffset) {
       changed = true;
+      _noxLearnOffsetChanged = true;
       config.noxLearningOffset = noxLearningOffset;
       logInfo("Set noxLearningOffset: " + String(noxLearningOffset));
     }
@@ -518,11 +520,10 @@ bool Configuration::parse(String data, bool isLocal) {
   }
 
   if (changed) {
+    udpated = true;
     saveConfig();
   }
   printConfig();
-
-  udpated = true;
   return true;
 }
 
@@ -740,3 +741,23 @@ void Configuration::setPostToAirGradient(bool enable) {
     logInfo("postDataToAirGradient: Ignored set to " + String(enable));
   }
 }
+
+bool Configuration::noxLearnOffsetChanged(void) {
+  bool changed = _noxLearnOffsetChanged;
+  _noxLearnOffsetChanged = false;
+  return changed;
+}
+
+bool Configuration::tvocLearnOffsetChanged(void) {
+  bool changed = _tvocLearningOffsetChanged;
+  _tvocLearningOffsetChanged = false;
+  return changed;
+}
+
+int Configuration::getTvocLearningOffset(void) {
+  return config.tvocLearningOffset;
+}
+
+int Configuration::getNoxLearningOffset(void) {
+  return config.noxLearningOffset;
+}
diff --git a/src/AgConfigure.h b/src/AgConfigure.h
index 1655d40..687e054 100644
--- a/src/AgConfigure.h
+++ b/src/AgConfigure.h
@@ -33,6 +33,8 @@ private:
   bool ledBarTestRequested;
   bool udpated;
   String failedMessage;
+  bool _noxLearnOffsetChanged;
+  bool _tvocLearningOffsetChanged;
 
   String getLedBarModeName(LedBarMode mode);
   void saveConfig(void);
@@ -73,6 +75,10 @@ public:
   bool isUpdated(void);
   String getFailedMesage(void);
   void setPostToAirGradient(bool enable);
+  bool noxLearnOffsetChanged(void);
+  bool tvocLearnOffsetChanged(void);
+  int getTvocLearningOffset(void);
+  int getNoxLearningOffset(void);
 };
 
 #endif /** _AG_CONFIG_H_ */
diff --git a/src/Sgp41/Sgp41.cpp b/src/Sgp41/Sgp41.cpp
index 471a986..e160f11 100644
--- a/src/Sgp41/Sgp41.cpp
+++ b/src/Sgp41/Sgp41.cpp
@@ -38,6 +38,20 @@ bool Sgp41::begin(TwoWire &wire) {
   _vocAlgorithm = new VOCGasIndexAlgorithm();
   _noxAlgorithm = new NOxGasIndexAlgorithm();
 
+  int32_t indexOffset;
+  int32_t learningTimeOffsetHours;
+  int32_t learningTimeGainHours;
+  int32_t gatingMaxDurationMin;
+  int32_t stdInitial;
+  int32_t gainFactor;
+  noxAlgorithm()->get_tuning_parameters(indexOffset, learningTimeOffsetHours, learningTimeGainHours, gatingMaxDurationMin, stdInitial, gainFactor);
+  learningTimeOffsetHours = noxLearnOffset;
+  noxAlgorithm()->set_tuning_parameters(indexOffset, learningTimeOffsetHours, learningTimeGainHours, gatingMaxDurationMin, stdInitial, gainFactor);
+
+  vocAlgorithm()->get_tuning_parameters(indexOffset, learningTimeOffsetHours, learningTimeGainHours, gatingMaxDurationMin, stdInitial, gainFactor);
+  learningTimeOffsetHours = tvocLearnOffset;
+  vocAlgorithm()->set_tuning_parameters(indexOffset, learningTimeOffsetHours, learningTimeGainHours, gatingMaxDurationMin, stdInitial, gainFactor);
+
   /** Init sensor */
   this->_sensor = new SensirionI2CSgp41();
   sgpSensor()->begin(wire);
@@ -51,6 +65,7 @@ bool Sgp41::begin(TwoWire &wire) {
     return false;
   }
 
+  onConditioning = true;
 #ifdef ESP32
   /** Create task */
   xTaskCreate(
@@ -270,3 +285,11 @@ void Sgp41::setCompensationTemperatureHumidity(float temp, float hum) {
   defaultRh = static_cast<uint16_t>(hum * 65535 / 100);
   AgLog("Update: defaultT: %d, defaultRh: %d", defaultT, defaultRh);
 }
+
+void Sgp41::setNoxLearningOffset(int offset) {
+  noxLearnOffset = offset;
+}
+
+void Sgp41::setTvocLearningOffset(int offset) {
+  tvocLearnOffset = offset;
+}
diff --git a/src/Sgp41/Sgp41.h b/src/Sgp41/Sgp41.h
index 3bbeda8..f7c0f96 100644
--- a/src/Sgp41/Sgp41.h
+++ b/src/Sgp41/Sgp41.h
@@ -26,6 +26,8 @@ public:
   int getTvocRaw(void);
   int getNoxRaw(void);
   void setCompensationTemperatureHumidity(float temp, float hum);
+  void setNoxLearningOffset(int offset);
+  void setTvocLearningOffset(int offset);
 
 private:
   bool onConditioning = true;
@@ -42,6 +44,10 @@ private:
   int tvocRaw;
   int nox = 0;
   int noxRaw;
+
+  int noxLearnOffset;
+  int tvocLearnOffset;
+
 #if defined(ESP8266)
   uint32_t conditioningPeriod;
   uint8_t conditioningCount;