diff --git a/.github/workflows/create-release.yaml b/.github/workflows/create-release.yaml
index fc55f93..e3d59c2 100644
--- a/.github/workflows/create-release.yaml
+++ b/.github/workflows/create-release.yaml
@@ -8,6 +8,11 @@ on:
         required: false
         default: ""
         type: string
+      is_final:
+        description: "It is a final release (not a pre-release)"
+        required: false
+        default: true
+        type: boolean
 
 permissions:
   contents: write # Allow to commit and push.
@@ -85,8 +90,8 @@ jobs:
         run: sudo apt-get update && sudo apt-get install -y gettext-base
 
       #----------------------------------------------
-      # Replace version in pyproject.toml, config.yaml and build.yaml
-      - name: Replace version
+      # Bump version in pyproject.toml, config.yaml and build.yaml
+      - name: Bump version
         run: |
           envsubst < pyproject.template.toml > pyproject.toml
           envsubst < addons/gazpar2haws/config.yaml.template > addons/gazpar2haws/config.yaml
@@ -100,7 +105,7 @@ jobs:
           git config --global user.name github-actions
           git config --global user.email github-actions@github.com
           git add pyproject.toml addons/gazpar2haws/config.yaml addons/gazpar2haws/build.yaml
-          git commit --allow-empty -m "Upgrade version to ${PACKAGE_VERSION}"
+          git commit --allow-empty -m "Bump version to ${PACKAGE_VERSION}"
           git push
 
       #----------------------------------------------
@@ -210,5 +215,6 @@ jobs:
         with:
           image: ssenart/gazpar2haws
           version: ${{ needs.prepare.outputs.package-version }}
+          is_latest : ${{ inputs.is_final }}
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_PASSWORD }}
diff --git a/.github/workflows/publish-to-dockerhub.yaml b/.github/workflows/publish-to-dockerhub.yaml
index e20d65e..0332574 100644
--- a/.github/workflows/publish-to-dockerhub.yaml
+++ b/.github/workflows/publish-to-dockerhub.yaml
@@ -8,6 +8,11 @@ on:
         required: false
         default: ""
         type: string
+      is_latest:
+        description: "Update the 'latest' tag"
+        required: false
+        default: true
+        type: boolean        
 
 permissions:
   contents: read # Readonly permissions
@@ -17,9 +22,9 @@ env:
 
 jobs:
   #----------------------------------------------
-  # Collect information
-  information:
-    name: Collect information
+  # Prepare
+  prepare:
+    name: Prepare
     outputs:
       package-version: ${{ steps.select-package-version.outputs.package-version }}
       default_python_version: ${{ env.DEFAULT_PYTHON_VERSION }}
@@ -66,7 +71,7 @@ jobs:
   # Publish Docker image to DockerHub
   publish-to-dockerhub:
     name: Publish to DockerHub
-    needs: information
+    needs: prepare
     runs-on: ubuntu-latest
     permissions:
       packages: write
@@ -85,6 +90,7 @@ jobs:
         uses: ./.github/workflows/publish-to-dockerhub
         with:
           image: ssenart/gazpar2haws
-          version: ${{ needs.information.outputs.package-version }}
+          version: ${{ needs.prepare.outputs.package-version }}
+          is_latest: ${{ inputs.is_latest }}
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_PASSWORD }}
diff --git a/.github/workflows/publish-to-dockerhub/action.yaml b/.github/workflows/publish-to-dockerhub/action.yaml
index c6c345a..bc74835 100644
--- a/.github/workflows/publish-to-dockerhub/action.yaml
+++ b/.github/workflows/publish-to-dockerhub/action.yaml
@@ -10,6 +10,10 @@ inputs:
   version:
     description: "Version of the image"
     required: true
+  is_latest: 
+    description: "Whether the version is a final release"
+    required: false
+    default: false
   username:
     description: "DockerHub username"
     required: true
@@ -39,7 +43,7 @@ runs:
         images: ${{ inputs.image }}
         tags: |
           # Set latest tag for the default branch
-          type=raw,value=latest,enable={{is_default_branch}}
+          type=raw,value=latest,enable=${{ inputs.is_latest }}
           # Set the version tag for all branches
           type=raw,value=${{ inputs.version }}
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4909971..4d9b1fb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,20 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.1.12] - 2025-01-15
+
+### Fixed
+
+[#37](https://github.com/ssenart/gazpar2haws/issues/37): Error GrDF send missing data with type="Absence de Données".
+
+[#38](https://github.com/ssenart/gazpar2haws/issues/38): Using the HA addon, the PCE identifier is transformed into another number.
+
+[#36](https://github.com/ssenart/gazpar2haws/issues/36): Error if HA endpoint configuration is missing in configuration.yaml.
+
+### Added
+
+[#33](https://github.com/ssenart/gazpar2haws/issues/33): Dockerhub 'latest' tag is currently published only if the release is created in the main branch.
+
 ## [0.1.11] - 2025-01-12
 
 ### Fixed
diff --git a/addons/gazpar2haws/rootfs/app/config/configuration.template.yaml b/addons/gazpar2haws/rootfs/app/config/configuration.template.yaml
index 7b2069d..c22f182 100644
--- a/addons/gazpar2haws/rootfs/app/config/configuration.template.yaml
+++ b/addons/gazpar2haws/rootfs/app/config/configuration.template.yaml
@@ -1,22 +1,22 @@
 logging:
   file: log/gazpar2haws.log
-  console: true  
+  console: true
   level: debug
-  format: '%(asctime)s %(levelname)s [%(name)s] %(message)s'
+  format: "%(asctime)s %(levelname)s [%(name)s] %(message)s"
 
 grdf:
   scan_interval: ${GRDF_SCAN_INTERVAL} # Number of minutes between each data retrieval (0 means no scan: a single data retrieval at startup, then stops).
   devices:
-  - name: gazpar2haws # Name of the device in home assistant. It will be used as the entity_id: sensor.${name}.
-    username: "!secret grdf.username"
-    password: "!secret grdf.password"
-    pce_identifier: "!secret grdf.pce_identifier"
-    timezone: ${GRDF_TIMEZONE} # Timezone of the data. It should be the same as the Home Assistant timezone.
-    last_days: ${GRDF_LAST_DAYS} # Number of days of data to retrieve
-    reset: false # If true, the data will be reset before the first data retrieval. If false, the data will be kept and new data will be added.
+    - name: gazpar2haws # Name of the device in home assistant. It will be used as the entity_id: sensor.${name}.
+      username: "!secret grdf.username"
+      password: "!secret grdf.password"
+      pce_identifier: "!secret grdf.pce_identifier"
+      timezone: "${GRDF_TIMEZONE}" # Timezone of the data. It should be the same as the Home Assistant timezone.
+      last_days: ${GRDF_LAST_DAYS} # Number of days of data to retrieve
+      reset: false # If true, the data will be reset before the first data retrieval. If false, the data will be kept and new data will be added.
 
 homeassistant:
   host: "!secret homeassistant.host"
   port: "!secret homeassistant.port"
-  endpoint: ${HOMEASSISTANT_ENDPOINT}  
+  endpoint: "${HOMEASSISTANT_ENDPOINT}" # The websocket endpoint to use. It should be /api/websocket by default.
   token: "!secret homeassistant.token"
diff --git a/addons/gazpar2haws/rootfs/app/config/secrets.template.yaml b/addons/gazpar2haws/rootfs/app/config/secrets.template.yaml
index c4f3926..d916d4d 100644
--- a/addons/gazpar2haws/rootfs/app/config/secrets.template.yaml
+++ b/addons/gazpar2haws/rootfs/app/config/secrets.template.yaml
@@ -1,7 +1,7 @@
-grdf.username: ${GRDF_USERNAME}
-grdf.password: ${GRDF_PASSWORD}
-grdf.pce_identifier: ${GRDF_PCE_IDENTIFIER}
+grdf.username: "${GRDF_USERNAME}"
+grdf.password: "${GRDF_PASSWORD}"
+grdf.pce_identifier: "${GRDF_PCE_IDENTIFIER}"
 
-homeassistant.host: ${HOMEASSISTANT_HOST}
-homeassistant.port: ${HOMEASSISTANT_PORT}
-homeassistant.token: ${HOMEASSISTANT_TOKEN}
+homeassistant.host: "${HOMEASSISTANT_HOST}"
+homeassistant.port: "${HOMEASSISTANT_PORT}"
+homeassistant.token: "${HOMEASSISTANT_TOKEN}"
diff --git a/config/secrets.template.yaml b/config/secrets.template.yaml
index c4f3926..477159e 100644
--- a/config/secrets.template.yaml
+++ b/config/secrets.template.yaml
@@ -1,7 +1,7 @@
-grdf.username: ${GRDF_USERNAME}
-grdf.password: ${GRDF_PASSWORD}
-grdf.pce_identifier: ${GRDF_PCE_IDENTIFIER}
-
-homeassistant.host: ${HOMEASSISTANT_HOST}
-homeassistant.port: ${HOMEASSISTANT_PORT}
-homeassistant.token: ${HOMEASSISTANT_TOKEN}
+grdf.username: "${GRDF_USERNAME}"
+grdf.password: "${GRDF_PASSWORD}"
+grdf.pce_identifier: "${GRDF_PCE_IDENTIFIER}"
+
+homeassistant.host: "${HOMEASSISTANT_HOST}"
+homeassistant.port: "${HOMEASSISTANT_PORT}"
+homeassistant.token: "${HOMEASSISTANT_TOKEN}"
diff --git a/gazpar2haws/bridge.py b/gazpar2haws/bridge.py
index cfe4d92..455f8b3 100644
--- a/gazpar2haws/bridge.py
+++ b/gazpar2haws/bridge.py
@@ -16,12 +16,30 @@ class Bridge:
     def __init__(self, config: config_utils.ConfigLoader):
 
         # GrDF scan interval (in seconds)
+        if config.get("grdf.scan_interval") is None:
+            raise ValueError("Configuration parameter 'grdf.scan_interval' is missing")
         self._grdf_scan_interval = int(config.get("grdf.scan_interval"))
 
-        # Home Assistant configuration
+        # Home Assistant configuration: host
+        if config.get("homeassistant.host") is None:
+            raise ValueError("Configuration parameter 'homeassistant.host' is missing")
         ha_host = config.get("homeassistant.host")
+
+        # Home Assistant configuration: port
+        if config.get("homeassistant.port") is None:
+            raise ValueError("Configuration parameter 'homeassistant.port' is missing")
         ha_port = config.get("homeassistant.port")
-        ha_endpoint = config.get("homeassistant.endpoint")
+
+        # Home Assistant configuration: endpoint
+        ha_endpoint = (
+            config.get("homeassistant.endpoint")
+            if config.get("homeassistant.endpoint")
+            else "/api/websocket"
+        )
+
+        # Home Assistant configuration: token
+        if config.get("homeassistant.token") is None:
+            raise ValueError("Configuration parameter 'homeassistant.token' is missing")
         ha_token = config.get("homeassistant.token")
 
         # Initialize Home Assistant
@@ -29,6 +47,9 @@ def __init__(self, config: config_utils.ConfigLoader):
 
         # Initialize Gazpar
         self._gazpar = []
+
+        if config.get("grdf.devices") is None:
+            raise ValueError("Configuration parameter 'grdf.devices' is missing")
         for grdf_device_config in config.get("grdf.devices"):
             self._gazpar.append(Gazpar(grdf_device_config, self._homeassistant))
 
diff --git a/gazpar2haws/gazpar.py b/gazpar2haws/gazpar.py
index 3ab253e..3cebaa5 100644
--- a/gazpar2haws/gazpar.py
+++ b/gazpar2haws/gazpar.py
@@ -19,15 +19,59 @@ def __init__(self, config: dict[str, Any], homeassistant: HomeAssistantWS):
 
         self._homeassistant = homeassistant
 
-        # GrDF configuration
+        # GrDF configuration: name
+        if config.get("name") is None:
+            raise ValueError("Configuration parameter 'grdf.devices[].name' is missing")
         self._name = config.get("name")
-        self._data_source = config.get("data_source")
+
+        # GrDF configuration: data source
+        self._data_source = (
+            config.get("data_source") if config.get("data_source") else "json"
+        )
+
+        # GrDF configuration: username
+        if self._data_source != "test" and config.get("username") is None:
+            raise ValueError(
+                "Configuration parameter 'grdf.devices[].username' is missing"
+            )
         self._username = config.get("username")
+
+        # GrDF configuration: password
+        if self._data_source != "test" and config.get("password") is None:
+            raise ValueError(
+                "Configuration parameter 'grdf.devices[].password' is missing"
+            )
         self._password = config.get("password")
+
+        # GrDF configuration: pce_identifier
+        if self._data_source != "test" and config.get("pce_identifier") is None:
+            raise ValueError(
+                "Configuration parameter 'grdf.devices[].pce_identifier' is missing"
+            )
         self._pce_identifier = str(config.get("pce_identifier"))
-        self._tmp_dir = config.get("tmp_dir")
+
+        # GrDF configuration: tmp_dir
+        self._tmp_dir = config.get("tmp_dir") if config.get("tmp_dir") else "/tmp"
+
+        # GrDF configuration: last_days
+        if config.get("last_days") is None:
+            raise ValueError(
+                "Configuration parameter 'grdf.devices[].last_days' is missing"
+            )
         self._last_days = int(str(config.get("last_days")))
+
+        # GrDF configuration: timezone
+        if config.get("timezone") is None:
+            raise ValueError(
+                "Configuration parameter 'grdf.devices[].timezone' is missing"
+            )
         self._timezone = str(config.get("timezone"))
+
+        # GrDF configuration: reset
+        if config.get("reset") is None:
+            raise ValueError(
+                "Configuration parameter 'grdf.devices[].reset' is missing"
+            )
         self._reset = bool(config.get("reset"))
 
         # As of date: YYYY-MM-DD
@@ -129,7 +173,13 @@ async def _publish_entity(
                 continue
 
             # Compute the total volume and energy
-            total += reading[property_name]
+            if reading[property_name] is not None:
+                total += reading[property_name]
+            else:
+                Logger.warning(
+                    f"Missing property {property_name} for date {date}. Skipping..."
+                )
+                continue
 
             statistics.append({"start": date.isoformat(), "state": total, "sum": total})
 
diff --git a/tests/config/configuration.yaml b/tests/config/configuration.yaml
index d52f2cf..f6d86a6 100644
--- a/tests/config/configuration.yaml
+++ b/tests/config/configuration.yaml
@@ -17,5 +17,4 @@ grdf:
 homeassistant:
   host: "!secret homeassistant.host"
   port: "!secret homeassistant.port"
-  endpoint: "/api/websocket"
   token: "!secret homeassistant.token"
diff --git a/tests/test_gazpar.py b/tests/test_gazpar.py
index a62b406..1f357c0 100644
--- a/tests/test_gazpar.py
+++ b/tests/test_gazpar.py
@@ -24,7 +24,11 @@ def setup_method(self):  # pylint: disable=R0801
 
         ha_host = self._config.get("homeassistant.host")
         ha_port = self._config.get("homeassistant.port")
-        ha_endpoint = self._config.get("homeassistant.endpoint")
+        ha_endpoint = (
+            self._config.get("homeassistant.endpoint")
+            if self._config.get("homeassistant.endpoint")
+            else "/api/websocket"
+        )
         ha_token = self._config.get("homeassistant.token")
 
         self._haws = HomeAssistantWS(  # pylint: disable=W0201
diff --git a/tests/test_haws.py b/tests/test_haws.py
index 217c478..9d71b9a 100644
--- a/tests/test_haws.py
+++ b/tests/test_haws.py
@@ -27,7 +27,11 @@ def setup_method(self):
 
         ha_host = self._config.get("homeassistant.host")
         ha_port = self._config.get("homeassistant.port")
-        ha_endpoint = self._config.get("homeassistant.endpoint")
+        ha_endpoint = (
+            self._config.get("homeassistant.endpoint")
+            if self._config.get("homeassistant.endpoint")
+            else "/api/websocket"
+        )
         ha_token = self._config.get("homeassistant.token")
 
         self._haws = HomeAssistantWS(  # pylint: disable=W0201