diff --git a/examples/BASIC_v4/BASIC_v4.ino b/examples/BASIC_v4/BASIC_v4.ino
index c94d793..def607e 100644
--- a/examples/BASIC_v4/BASIC_v4.ino
+++ b/examples/BASIC_v4/BASIC_v4.ino
@@ -569,14 +569,19 @@ static void serverConfigPoll(void) {
       co2Calibration();
     }
     if (agServer.getCo2AbcDaysConfig() > 0) {
+      int newHour = agServer.getCo2AbcDaysConfig() * 24;
       Serial.printf("abcDays config: %d days(%d hours)\r\n",
-                    agServer.getCo2AbcDaysConfig(),
-                    agServer.getCo2AbcDaysConfig() * 24);
+                    agServer.getCo2AbcDaysConfig(), newHour);
+      int curHour = ag.s8.getAbcPeriod();
       Serial.printf("Current config: %d (hours)\r\n", ag.s8.getAbcPeriod());
-      if (ag.s8.setAbcPeriod(agServer.getCo2AbcDaysConfig() * 24) == false) {
-        Serial.println("Set S8 abcDays period calib failed");
+      if (curHour == newHour) {
+        Serial.println("set 'abcDays' ignored");
       } else {
-        Serial.println("Set S8 abcDays period calib success");
+        if (ag.s8.setAbcPeriod(agServer.getCo2AbcDaysConfig() * 24) == false) {
+          Serial.println("Set S8 abcDays period calib failed");
+        } else {
+          Serial.println("Set S8 abcDays period calib success");
+        }
       }
     }
   }
diff --git a/examples/ONE_I-9PSL/ONE_I-9PSL.ino b/examples/ONE_I-9PSL/ONE_I-9PSL.ino
index 5a64055..51032b9 100644
--- a/examples/ONE_I-9PSL/ONE_I-9PSL.ino
+++ b/examples/ONE_I-9PSL/ONE_I-9PSL.ino
@@ -774,7 +774,7 @@ void webServerMeasureCurrentGet(void) {
   webServer.send(200, "application/json", getServerSyncData());
 }
 
-void webServerHandler(void* param) {
+void webServerHandler(void *param) {
   for (;;) {
     webServer.handleClient();
   }
@@ -1269,17 +1269,24 @@ static void serverConfigPoll(void) {
     if (agServer.isCo2Calib()) {
       co2Calibration();
     }
+
     if (agServer.getCo2AbcDaysConfig() > 0) {
+      int newHour = agServer.getCo2AbcDaysConfig() * 24;
       Serial.printf("abcDays config: %d days(%d hours)\r\n",
-                    agServer.getCo2AbcDaysConfig(),
-                    agServer.getCo2AbcDaysConfig() * 24);
+                    agServer.getCo2AbcDaysConfig(), newHour);
+      int curHour = ag.s8.getAbcPeriod();
       Serial.printf("Current config: %d (hours)\r\n", ag.s8.getAbcPeriod());
-      if (ag.s8.setAbcPeriod(agServer.getCo2AbcDaysConfig() * 24) == false) {
-        Serial.println("Set S8 abcDays period calib failed");
+      if (curHour == newHour) {
+        Serial.println("set 'abcDays' ignored");
       } else {
-        Serial.println("Set S8 abcDays period calib success");
+        if (ag.s8.setAbcPeriod(agServer.getCo2AbcDaysConfig() * 24) == false) {
+          Serial.println("Set S8 abcDays period calib failed");
+        } else {
+          Serial.println("Set S8 abcDays period calib success");
+        }
       }
     }
+
     if (agServer.isLedBarTestRequested()) {
       if (agServer.getCountry() == "TH") {
         ledTest2Min();
diff --git a/examples/Open_Air/Open_Air.ino b/examples/Open_Air/Open_Air.ino
index bc1c867..f24c30f 100644
--- a/examples/Open_Air/Open_Air.ino
+++ b/examples/Open_Air/Open_Air.ino
@@ -444,10 +444,8 @@ public:
     }
 
     /** Register event */
-    if (esp_mqtt_client_register_event(
-            client, MQTT_EVENT_ANY,
-            mqtt_event_handler,
-            NULL) != ESP_OK) {
+    if (esp_mqtt_client_register_event(client, MQTT_EVENT_ANY,
+                                       mqtt_event_handler, NULL) != ESP_OK) {
       Serial.println("mqtt client register event failed");
       return false;
     }
@@ -980,15 +978,22 @@ static void serverConfigPoll(void) {
       if (agServer.isCo2Calib()) {
         co2Calibration();
       }
+
       if (agServer.getCo2AbcDaysConfig() > 0) {
+        int newHour = agServer.getCo2AbcDaysConfig() * 24;
         Serial.printf("abcDays config: %d days(%d hours)\r\n",
-                      agServer.getCo2AbcDaysConfig(),
-                      agServer.getCo2AbcDaysConfig() * 24);
+                      agServer.getCo2AbcDaysConfig(), newHour);
+        int curHour = ag.s8.getAbcPeriod();
         Serial.printf("Current config: %d (hours)\r\n", ag.s8.getAbcPeriod());
-        if (ag.s8.setAbcPeriod(agServer.getCo2AbcDaysConfig() * 24) == false) {
-          Serial.println("Set S8 abcDays period calib failed");
+        if (curHour == newHour) {
+          Serial.println("set 'abcDays' ignored");
         } else {
-          Serial.println("Set S8 abcDays period calib success");
+          if (ag.s8.setAbcPeriod(agServer.getCo2AbcDaysConfig() * 24) ==
+              false) {
+            Serial.println("Set S8 abcDays period calib failed");
+          } else {
+            Serial.println("Set S8 abcDays period calib success");
+          }
         }
       }
     }