diff --git a/agrilink_vocpro/lib/core/constant/app_constant.dart b/agrilink_vocpro/lib/core/constant/app_constant.dart
index 3c93688..f7ab4eb 100644
--- a/agrilink_vocpro/lib/core/constant/app_constant.dart
+++ b/agrilink_vocpro/lib/core/constant/app_constant.dart
@@ -22,13 +22,13 @@ class AppConstant {
   static const String dht = 'dht';
 
   static const String soilTemp = 'soilTemperature';
-  static const String soilMoisture = 'soilMoisture';
+  static const String soilMoisture = 'soilHumidity';
   static const String airTemp = 'viciTemperature';
-  static const String humidity = 'humidity';
-  static const String lightIntensity = 'lightIntensity';
-  static const String conductivity = 'conductivity';
-  static const String ph = 'ph';
-  static const String nitrogen = 'nitrogen';
-  static const String phosphorus = 'phosphorus';
-  static const String potassium = 'potassium';
+  static const String humidity = 'viciHumidity';
+  static const String lightIntensity = 'viciluminosity';
+  static const String conductivity = 'soilConductivity';
+  static const String ph = 'soilPh';
+  static const String nitrogen = 'soilNitrogen';
+  static const String phosphorus = 'soilPhosphorus';
+  static const String potassium = 'soilPotassium';
 }
diff --git a/agrilink_vocpro/lib/features/home/detail_pages/conductivity/provider/conductivity_provider.dart b/agrilink_vocpro/lib/features/home/detail_pages/conductivity/provider/conductivity_provider.dart
index 50c6969..ae5a525 100644
--- a/agrilink_vocpro/lib/features/home/detail_pages/conductivity/provider/conductivity_provider.dart
+++ b/agrilink_vocpro/lib/features/home/detail_pages/conductivity/provider/conductivity_provider.dart
@@ -1,3 +1,4 @@
+import 'package:agrilink_vocpro/core/constant/app_constant.dart';
 import 'package:agrilink_vocpro/core/state/result_state.dart';
 import 'package:agrilink_vocpro/data/model/latest_data_response.dart';
 import 'package:agrilink_vocpro/domain/service/app_service.dart';
@@ -17,8 +18,8 @@ class ConductivityProvider extends ChangeNotifier {
     dataState = ResultState.loading;
     notifyListeners();
     try {
-      final result =
-          await AppService().getGraphicDataNpk1(metric: 'soilConductivity');
+      final result = await AppService()
+          .getGraphicDataNpk1(metric: AppConstant.conductivity);
       if (result.data == null || result.data!.npk1!.isEmpty) {
         dataState = ResultState.noData;
       } else {
@@ -27,7 +28,7 @@ class ConductivityProvider extends ChangeNotifier {
       }
     } catch (e) {
       if (kDebugMode) {
-        print('Get Grafik Soil Temp Error: $e');
+        print('Get Grafik Conductivity Error: $e');
       }
       dataState = ResultState.error;
     }
@@ -38,8 +39,8 @@ class ConductivityProvider extends ChangeNotifier {
     dataState = ResultState.loading;
     notifyListeners();
     try {
-      final result =
-          await AppService().getGraphicDataNpk2(metric: 'soilConductivity');
+      final result = await AppService()
+          .getGraphicDataNpk2(metric: AppConstant.conductivity);
       if (result.data == null || result.data!.npk2!.isEmpty) {
         dataState = ResultState.noData;
       } else {
@@ -48,7 +49,7 @@ class ConductivityProvider extends ChangeNotifier {
       }
     } catch (e) {
       if (kDebugMode) {
-        print('Get Grafik Soil Temp Error: $e');
+        print('Get Grafik Conductivity Error: $e');
       }
       dataState = ResultState.error;
     }
diff --git a/agrilink_vocpro/lib/features/home/detail_pages/humidity/provider/humidity_provider.dart b/agrilink_vocpro/lib/features/home/detail_pages/humidity/provider/humidity_provider.dart
index 36a2050..03d7705 100644
--- a/agrilink_vocpro/lib/features/home/detail_pages/humidity/provider/humidity_provider.dart
+++ b/agrilink_vocpro/lib/features/home/detail_pages/humidity/provider/humidity_provider.dart
@@ -1,3 +1,4 @@
+import 'package:agrilink_vocpro/core/constant/app_constant.dart';
 import 'package:agrilink_vocpro/core/state/result_state.dart';
 import 'package:agrilink_vocpro/data/model/latest_data_response.dart';
 import 'package:agrilink_vocpro/domain/service/app_service.dart';
@@ -16,7 +17,7 @@ class HumidityProvider extends ChangeNotifier {
     notifyListeners();
     try {
       final result =
-          await AppService().getGrafikDataDht(metric: 'viciHumidity');
+          await AppService().getGrafikDataDht(metric: AppConstant.humidity);
       if (result.data == null || result.data!.dht!.isEmpty) {
         dataState = ResultState.noData;
       } else {
diff --git a/agrilink_vocpro/lib/features/home/detail_pages/luminosity/provider/lum_provider.dart b/agrilink_vocpro/lib/features/home/detail_pages/luminosity/provider/lum_provider.dart
index ccad851..fa38e05 100644
--- a/agrilink_vocpro/lib/features/home/detail_pages/luminosity/provider/lum_provider.dart
+++ b/agrilink_vocpro/lib/features/home/detail_pages/luminosity/provider/lum_provider.dart
@@ -1,3 +1,4 @@
+import 'package:agrilink_vocpro/core/constant/app_constant.dart';
 import 'package:agrilink_vocpro/core/state/result_state.dart';
 import 'package:agrilink_vocpro/data/model/latest_data_response.dart';
 import 'package:agrilink_vocpro/domain/service/app_service.dart';
@@ -15,8 +16,8 @@ class LumProvider extends ChangeNotifier {
     dataState = ResultState.loading;
     notifyListeners();
     try {
-      final result =
-          await AppService().getGrafikDataDht(metric: 'viciluminosity');
+      final result = await AppService()
+          .getGrafikDataDht(metric: AppConstant.lightIntensity);
       if (result.data == null || result.data!.dht!.isEmpty) {
         dataState = ResultState.noData;
       } else {
diff --git a/agrilink_vocpro/lib/features/home/detail_pages/nitrogen/provider/nitrogen_provider.dart b/agrilink_vocpro/lib/features/home/detail_pages/nitrogen/provider/nitrogen_provider.dart
index 7b1da62..93f2841 100644
--- a/agrilink_vocpro/lib/features/home/detail_pages/nitrogen/provider/nitrogen_provider.dart
+++ b/agrilink_vocpro/lib/features/home/detail_pages/nitrogen/provider/nitrogen_provider.dart
@@ -1,3 +1,4 @@
+import 'package:agrilink_vocpro/core/constant/app_constant.dart';
 import 'package:agrilink_vocpro/core/state/result_state.dart';
 import 'package:agrilink_vocpro/data/model/latest_data_response.dart';
 import 'package:agrilink_vocpro/domain/service/app_service.dart';
@@ -18,7 +19,7 @@ class NitrogenProvider extends ChangeNotifier {
     notifyListeners();
     try {
       final result =
-          await AppService().getGraphicDataNpk1(metric: 'soilNitrogen');
+          await AppService().getGraphicDataNpk1(metric: AppConstant.nitrogen);
       if (result.data == null || result.data!.npk1!.isEmpty) {
         dataState = ResultState.noData;
       } else {
@@ -39,7 +40,7 @@ class NitrogenProvider extends ChangeNotifier {
     notifyListeners();
     try {
       final result =
-          await AppService().getGraphicDataNpk2(metric: 'soilNitrogen');
+          await AppService().getGraphicDataNpk2(metric: AppConstant.nitrogen);
       if (result.data == null || result.data!.npk2!.isEmpty) {
         dataState = ResultState.noData;
       } else {
diff --git a/agrilink_vocpro/lib/features/home/detail_pages/ph/provider/ph_provider.dart b/agrilink_vocpro/lib/features/home/detail_pages/ph/provider/ph_provider.dart
index 8b8c66b..5050a37 100644
--- a/agrilink_vocpro/lib/features/home/detail_pages/ph/provider/ph_provider.dart
+++ b/agrilink_vocpro/lib/features/home/detail_pages/ph/provider/ph_provider.dart
@@ -1,3 +1,4 @@
+import 'package:agrilink_vocpro/core/constant/app_constant.dart';
 import 'package:agrilink_vocpro/core/state/result_state.dart';
 import 'package:agrilink_vocpro/data/model/latest_data_response.dart';
 import 'package:agrilink_vocpro/domain/service/app_service.dart';
@@ -17,7 +18,8 @@ class PhProvider extends ChangeNotifier {
     dataState = ResultState.loading;
     notifyListeners();
     try {
-      final result = await AppService().getGraphicDataNpk1(metric: 'soilPh');
+      final result =
+          await AppService().getGraphicDataNpk1(metric: AppConstant.ph);
       if (result.data == null || result.data!.npk1!.isEmpty) {
         dataState = ResultState.noData;
       } else {
@@ -26,7 +28,7 @@ class PhProvider extends ChangeNotifier {
       }
     } catch (e) {
       if (kDebugMode) {
-        print('Get Grafik Soil Temp Error: $e');
+        print('Get Grafik Soil pH Error: $e');
       }
       dataState = ResultState.error;
     }
@@ -37,7 +39,8 @@ class PhProvider extends ChangeNotifier {
     dataState = ResultState.loading;
     notifyListeners();
     try {
-      final result = await AppService().getGraphicDataNpk2(metric: 'soilPh');
+      final result =
+          await AppService().getGraphicDataNpk2(metric: AppConstant.ph);
       if (result.data == null || result.data!.npk2!.isEmpty) {
         dataState = ResultState.noData;
       } else {
@@ -46,7 +49,7 @@ class PhProvider extends ChangeNotifier {
       }
     } catch (e) {
       if (kDebugMode) {
-        print('Get Grafik Soil Temp Error: $e');
+        print('Get Grafik Soil pH Error: $e');
       }
       dataState = ResultState.error;
     }
diff --git a/agrilink_vocpro/lib/features/home/detail_pages/phosphorus/provider/phosporus_provider.dart b/agrilink_vocpro/lib/features/home/detail_pages/phosphorus/provider/phosporus_provider.dart
index 158db16..e36e934 100644
--- a/agrilink_vocpro/lib/features/home/detail_pages/phosphorus/provider/phosporus_provider.dart
+++ b/agrilink_vocpro/lib/features/home/detail_pages/phosphorus/provider/phosporus_provider.dart
@@ -1,3 +1,4 @@
+import 'package:agrilink_vocpro/core/constant/app_constant.dart';
 import 'package:agrilink_vocpro/core/state/result_state.dart';
 import 'package:agrilink_vocpro/data/model/latest_data_response.dart';
 import 'package:agrilink_vocpro/domain/service/app_service.dart';
@@ -18,7 +19,7 @@ class PhosporusProvider extends ChangeNotifier {
     notifyListeners();
     try {
       final result =
-          await AppService().getGraphicDataNpk1(metric: 'soilPhosphorus');
+          await AppService().getGraphicDataNpk1(metric: AppConstant.phosphorus);
       if (result.data == null || result.data!.npk1!.isEmpty) {
         dataState = ResultState.noData;
       } else {
@@ -27,7 +28,7 @@ class PhosporusProvider extends ChangeNotifier {
       }
     } catch (e) {
       if (kDebugMode) {
-        print('Get Grafik Soil Temp Error: $e');
+        print('Get Grafik Phosphor Error: $e');
       }
       dataState = ResultState.error;
     }
@@ -39,7 +40,7 @@ class PhosporusProvider extends ChangeNotifier {
     notifyListeners();
     try {
       final result =
-          await AppService().getGraphicDataNpk2(metric: 'soilPhosphorus');
+          await AppService().getGraphicDataNpk2(metric: AppConstant.phosphorus);
       if (result.data == null || result.data!.npk2!.isEmpty) {
         dataState = ResultState.noData;
       } else {
@@ -48,7 +49,7 @@ class PhosporusProvider extends ChangeNotifier {
       }
     } catch (e) {
       if (kDebugMode) {
-        print('Get Grafik Soil Temp Error: $e');
+        print('Get Grafik Phosphor Error: $e');
       }
       dataState = ResultState.error;
     }
diff --git a/agrilink_vocpro/lib/features/home/detail_pages/potassium/provider/potassium_provider.dart b/agrilink_vocpro/lib/features/home/detail_pages/potassium/provider/potassium_provider.dart
index a771937..1591347 100644
--- a/agrilink_vocpro/lib/features/home/detail_pages/potassium/provider/potassium_provider.dart
+++ b/agrilink_vocpro/lib/features/home/detail_pages/potassium/provider/potassium_provider.dart
@@ -1,3 +1,4 @@
+import 'package:agrilink_vocpro/core/constant/app_constant.dart';
 import 'package:agrilink_vocpro/core/state/result_state.dart';
 import 'package:agrilink_vocpro/data/model/latest_data_response.dart';
 import 'package:agrilink_vocpro/domain/service/app_service.dart';
@@ -18,7 +19,7 @@ class PotassiumProvider extends ChangeNotifier {
     notifyListeners();
     try {
       final result =
-          await AppService().getGraphicDataNpk1(metric: 'soilPotassium');
+          await AppService().getGraphicDataNpk1(metric: AppConstant.potassium);
       if (result.data == null || result.data!.npk1!.isEmpty) {
         dataState = ResultState.noData;
       } else {
@@ -27,7 +28,7 @@ class PotassiumProvider extends ChangeNotifier {
       }
     } catch (e) {
       if (kDebugMode) {
-        print('Get Grafik Soil Temp Error: $e');
+        print('Get Grafik Potassium Error: $e');
       }
       dataState = ResultState.error;
     }
@@ -39,7 +40,7 @@ class PotassiumProvider extends ChangeNotifier {
     notifyListeners();
     try {
       final result =
-          await AppService().getGraphicDataNpk2(metric: 'soilPotassium');
+          await AppService().getGraphicDataNpk2(metric: AppConstant.potassium);
       if (result.data == null || result.data!.npk2!.isEmpty) {
         dataState = ResultState.noData;
       } else {
@@ -48,7 +49,7 @@ class PotassiumProvider extends ChangeNotifier {
       }
     } catch (e) {
       if (kDebugMode) {
-        print('Get Grafik Soil Temp Error: $e');
+        print('Get Grafik Potassium Error: $e');
       }
       dataState = ResultState.error;
     }
diff --git a/agrilink_vocpro/lib/features/home/detail_pages/soil_moisture/provider/soil_moisture_provider.dart b/agrilink_vocpro/lib/features/home/detail_pages/soil_moisture/provider/soil_moisture_provider.dart
index f0ecba4..13a4f7d 100644
--- a/agrilink_vocpro/lib/features/home/detail_pages/soil_moisture/provider/soil_moisture_provider.dart
+++ b/agrilink_vocpro/lib/features/home/detail_pages/soil_moisture/provider/soil_moisture_provider.dart
@@ -1,3 +1,4 @@
+import 'package:agrilink_vocpro/core/constant/app_constant.dart';
 import 'package:agrilink_vocpro/core/state/result_state.dart';
 import 'package:agrilink_vocpro/data/model/latest_data_response.dart';
 import 'package:agrilink_vocpro/domain/service/app_service.dart';
@@ -17,8 +18,8 @@ class SoilMoistureProvider extends ChangeNotifier {
     dataState = ResultState.loading;
     notifyListeners();
     try {
-      final result =
-          await AppService().getGraphicDataNpk1(metric: 'soilhumidity');
+      final result = await AppService()
+          .getGraphicDataNpk1(metric: AppConstant.soilMoisture);
       if (result.data == null || result.data!.npk1!.isEmpty) {
         dataState = ResultState.noData;
       } else {
@@ -38,8 +39,8 @@ class SoilMoistureProvider extends ChangeNotifier {
     dataState = ResultState.loading;
     notifyListeners();
     try {
-      final result =
-          await AppService().getGraphicDataNpk2(metric: 'soilhumidity');
+      final result = await AppService()
+          .getGraphicDataNpk2(metric: AppConstant.soilMoisture);
       if (result.data == null || result.data!.npk2!.isEmpty) {
         dataState = ResultState.noData;
       } else {
diff --git a/agrilink_vocpro/lib/features/home/detail_pages/soil_temperature/provider/soil_temp_provider.dart b/agrilink_vocpro/lib/features/home/detail_pages/soil_temperature/provider/soil_temp_provider.dart
index 5c95391..66d5ea7 100644
--- a/agrilink_vocpro/lib/features/home/detail_pages/soil_temperature/provider/soil_temp_provider.dart
+++ b/agrilink_vocpro/lib/features/home/detail_pages/soil_temperature/provider/soil_temp_provider.dart
@@ -1,3 +1,4 @@
+import 'package:agrilink_vocpro/core/constant/app_constant.dart';
 import 'package:agrilink_vocpro/core/state/result_state.dart';
 import 'package:agrilink_vocpro/data/model/latest_data_response.dart';
 import 'package:agrilink_vocpro/domain/service/app_service.dart';
@@ -18,7 +19,7 @@ class SoilTempProvider extends ChangeNotifier {
     notifyListeners();
     try {
       final result =
-          await AppService().getGraphicDataNpk1(metric: 'soilTemperature');
+          await AppService().getGraphicDataNpk1(metric: AppConstant.soilTemp);
       if (result.data == null || result.data!.npk1!.isEmpty) {
         dataState = ResultState.noData;
       } else {
@@ -39,7 +40,7 @@ class SoilTempProvider extends ChangeNotifier {
     notifyListeners();
     try {
       final result =
-          await AppService().getGraphicDataNpk2(metric: 'soilTemperature');
+          await AppService().getGraphicDataNpk2(metric: AppConstant.soilTemp);
       if (result.data == null || result.data!.npk2!.isEmpty) {
         dataState = ResultState.noData;
       } else {