diff --git a/nymea-plugins.pro b/nymea-plugins.pro
index 01b19cd3..b1e82f04 100644
--- a/nymea-plugins.pro
+++ b/nymea-plugins.pro
@@ -47,6 +47,7 @@ PLUGIN_DIRS = \
     notifyevents        \
     nuki                \
     onewire             \
+    openmeteo           \
     openuv              \ 
     openweathermap      \
     osdomotics          \
diff --git a/openmeteo/CLAUDE_CODE_PROMPT_build_test_deb.md b/openmeteo/CLAUDE_CODE_PROMPT_build_test_deb.md
new file mode 100644
index 00000000..a3681575
--- /dev/null
+++ b/openmeteo/CLAUDE_CODE_PROMPT_build_test_deb.md
@@ -0,0 +1,66 @@
+# Prompt Claude Code — build, test et packaging du module `openmeteo`
+
+> À coller dans Claude Code, à la racine du dépôt `etm-powersync-plugins`.
+> Le module `openmeteo/` existe déjà (`.json`, `.h`, `.cpp`, `.pro`, `meta.json`, `README.md`, `openmeteo.png`).
+> Lis d'abord `CLAUDE.md` (conventions du repo) et le code existant **avant** de modifier quoi que ce soit.
+
+## Objectif
+
+Faire compiler, tester manuellement, puis packager en `.deb` le plugin d'intégration nymea `openmeteo`, sans en changer le comportement fonctionnel décrit dans `integrationpluginopenmeteo.cpp`.
+
+## Étape 1 — Intégration au build
+
+1. Ajouter `openmeteo` à la liste `SUBDIRS` de `nymea-plugins.pro` (ordre alphabétique, comme les autres modules).
+2. Vérifier que `openmeteo/openmeteo.pro` inclut bien `../plugins.pri` et `QT *= network`.
+
+## Étape 2 — Compilation et correction des constantes générées
+
+1. Compiler le module (QMake, dans l'arbre, Qt5 d'abord) :
+   ```
+   qmake && make -j$(nproc)
+   ```
+2. `plugininfo.h` est **généré** à partir de `integrationpluginopenmeteo.json` par l'outil nymea. Ne pas l'éditer.
+3. Le `.cpp` référence des constantes (`openMeteoSite*StateTypeId`, `openMeteoPlugin*ParamTypeId`, `openMeteoPvPlane*`, `dcOpenMeteo`, etc.) déduites de la convention nymea. **Comparer ces noms au `plugininfo.h` réellement généré** et corriger toute divergence **dans le `.cpp`** (jamais dans le header généré). Lister les corrections faites.
+4. Corriger les éventuels warnings de compilation (variables inutilisées, signedness, etc.).
+5. Rejouer le build en **Qt6** et corriger les différences éventuelles.
+
+## Étape 3 — Vérification du point satellite
+
+Le `.cpp` contient un `TODO(verify)` dans `updateSiteSatellite()` : l'endpoint satellite (`{satelliteBaseUrl}/v1/archive`, modèle `satellite_radiation_seamless`) doit accepter `current=shortwave_radiation,shortwave_radiation_clear_sky`.
+
+1. Tester l'URL réellement construite (avec une vraie lat/lon, p.ex. 48.9 / 7.85) avec `curl`.
+2. Si `current=` n'est pas supporté : basculer sur `hourly=` et prendre le dernier échantillon **non nul** (garder le calcul `clearSkyIndex = ghiObs/clearSky`, garde `clearSky > 20`).
+3. Documenter le comportement retenu en commentaire.
+
+## Étape 4 — Test manuel (fonctionnel)
+
+Installer le plugin localement et, via `nymea-cli` ou l'app :
+
+1. Ajouter un thing **openMeteoSite** (latitude 48.9, longitude 7.85). Vérifier qu'au premier cycle se remplissent : `temperature`, `windSpeed`, `cloudiness`, `humidity`, `pressure`, `weatherCondition`, `ghi`, `dni`, `dhi`, `terrestrialRadiation`, `sunriseTime`, `sunsetTime`, `daylight`, et les daily (`temperatureMin/Max`, `shortwaveRadiationSumToday`).
+2. Vérifier les states satellite : `ghiObserved`, `clearSkyGhi`, `clearSkyIndex`.
+3. Ajouter un thing **openMeteoPvPlane** enfant du site (tilt 30, azimuth 180 = plein sud). Vérifier `gtiNow` cohérent (proche du GHI à midi pour un plan ~sud).
+4. Vérifier la conversion d'azimut : un pan azimuth 90 (Est) doit produire un GTI matinal supérieur à un pan azimuth 270 (Ouest) le matin.
+5. Contrôle **de nuit** : `daylight=false`, `ghi≈0`, `clearSkyIndex=0`, pas de division par zéro, pas de crash.
+6. Déclencher l'action `refreshWeather` sur le site et vérifier que site + pans se mettent à jour immédiatement.
+
+## Étape 5 — Packaging `.deb`
+
+1. Utiliser les dossiers `debian-qt5` / `debian-qt6` existants du dépôt (le lien `debian -> debian-qt5` est en place).
+2. Vérifier/compléter le `debian/control` et les fichiers d'install pour inclure le paquet `nymea-plugin-openmeteo` (binaire du plugin + `integrationpluginopenmeteo.json` + ressources).
+3. Construire le paquet (p.ex. `dpkg-buildpackage -b -us -uc` ou la cible utilisée par le repo) et vérifier que le `.deb` contient bien la librairie du plugin et son métadonnée.
+4. Indiquer le nom exact du `.deb` produit et son emplacement.
+
+## Contraintes
+
+- **Ne pas modifier les autres plugins** de l'arbre.
+- **Aucune logique propriétaire** (cf. `CLAUDE.md` / frontière de licence) : ce plugin reste une source de données.
+- Garder le code et les commentaires en anglais (convention nymea-plugins).
+- Montrer chaque diff avant de l'appliquer ; procéder étape par étape.
+
+## Livrables attendus
+
+- Module compilé en Qt5 et Qt6, sans warning.
+- Liste des corrections de constantes (le cas échéant).
+- Comportement satellite confirmé/ajusté.
+- Compte rendu du test manuel (states remplis jour/nuit, GTI cohérent par orientation).
+- `.deb` `nymea-plugin-openmeteo` produit, nom et emplacement indiqués.
diff --git a/openmeteo/README.md b/openmeteo/README.md
new file mode 100644
index 00000000..56e30e0a
--- /dev/null
+++ b/openmeteo/README.md
@@ -0,0 +1,49 @@
+# OpenMeteo
+
+This plugin allows to get current weather and solar irradiance data from [Open-Meteo](https://open-meteo.com), including plane-of-array irradiance (GTI) for photovoltaic surfaces and satellite-observed clear-sky data.
+
+## Usage
+
+The data is refreshed every 15 minutes automatically, and can also be refreshed manually.
+
+A **site** is added by entering its latitude and longitude (no discovery). It provides the shared weather and solar data for the location, including a satellite-observed GHI and clear-sky index.
+
+One or more **PV planes** can be added as children of a site. Each plane has its own tilt, azimuth and peak power, and reports the global tilted irradiance (GTI) for that orientation. Multiple orientations are handled by adding multiple planes.
+
+> Note: the azimuth is entered in geographic convention (180 = South, 90 = East, 270 = West).
+
+By default the plugin queries the public Open-Meteo API. For commercial deployments, the `Base URL` and `Base URL (satellite radiation)` plugin settings can be pointed to a self-hosted Open-Meteo instance (the public API is for non-commercial use only).
+
+## Supported Things
+
+* Open-Meteo site (interfaces: weather, daylightsensor)
+    * Weather condition
+    * Temperature (current, daily min and max)
+    * Humidity
+    * Pressure
+    * Wind speed and direction
+    * Cloudiness
+    * Snowfall
+    * Global, direct normal and diffuse irradiance (GHI / DNI / DHI)
+    * Terrestrial (top-of-atmosphere) radiation
+    * Daily shortwave radiation sum
+    * Satellite-observed GHI, clear-sky GHI and clear-sky index
+    * Sunrise and sunset time
+    * Daylight
+
+* Open-Meteo PV plane
+    * Global tilted irradiance (GTI) for the configured tilt and azimuth
+
+## Requirements
+
+* Internet connection, or a reachable self-hosted Open-Meteo instance
+* The package 'nymea-plugin-openmeteo' must be installed
+* No API key is required. For commercial use, a self-hosted instance is required (the public Open-Meteo API is non-commercial only).
+
+## More
+
+Open-Meteo https://open-meteo.com
+
+Weather data by Météo-France, satellite radiation by EUMETSAT, provided through Open-Meteo (CC-BY 4.0).
+
+For the overall architecture (role of this plugin, conventions, license boundary), see the `etm-powersync-docs` repository.
diff --git a/openmeteo/integrationpluginopenmeteo.cpp b/openmeteo/integrationpluginopenmeteo.cpp
new file mode 100644
index 00000000..4165b97c
--- /dev/null
+++ b/openmeteo/integrationpluginopenmeteo.cpp
@@ -0,0 +1,367 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+*
+* Copyright (C) 2026, ETM-Schurig SARL
+*
+* This file is part of etm-powersync-plugins.
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program. If not, see <https://www.gnu.org/licenses/>.
+*
+* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#include "integrationpluginopenmeteo.h"
+#include "plugininfo.h"
+
+#include <QJsonDocument>
+#include <QJsonParseError>
+#include <QVariantMap>
+#include <QUrl>
+#include <QUrlQuery>
+
+#include <integrations/thing.h>
+#include <network/networkaccessmanager.h>
+
+// NOTE: the *StateTypeId / *ParamTypeId / *ThingClassId / *ActionTypeId / dcOpenMeteo
+// identifiers below are generated into plugininfo.h from integrationpluginopenmeteo.json.
+// If a name does not match, align it with the generated header (do not edit plugininfo.h).
+
+IntegrationPluginOpenMeteo::IntegrationPluginOpenMeteo()
+{
+}
+
+void IntegrationPluginOpenMeteo::init()
+{
+    // No API key required. Plugin parameters (baseUrl, satelliteBaseUrl, weatherModel)
+    // are read at request time via configValue().
+}
+
+void IntegrationPluginOpenMeteo::setupThing(ThingSetupInfo *info)
+{
+    Thing *thing = info->thing();
+
+    if (thing->thingClassId() == openMeteoSiteThingClassId) {
+        double lat, lon;
+        if (!resolveCoordinates(thing, lat, lon)) {
+            info->finish(Thing::ThingErrorInvalidParameter, QT_TR_NOOP("Missing coordinates for this site."));
+            return;
+        }
+        updateSiteForecast(thing);
+        updateSiteSatellite(thing);
+    } else if (thing->thingClassId() == openMeteoPvPlaneThingClassId) {
+        double lat, lon;
+        if (!resolveCoordinates(thing, lat, lon)) {
+            info->finish(Thing::ThingErrorHardwareNotAvailable, QT_TR_NOOP("Parent site not available."));
+            return;
+        }
+        updatePlane(thing);
+    }
+
+    info->finish(Thing::ThingErrorNoError);
+
+    if (!m_pluginTimer) {
+        // 900 s = 15 min, aligned with the OpenWeatherMap reference plugin.
+        m_pluginTimer = hardwareManager()->pluginTimerManager()->registerTimer(900);
+        connect(m_pluginTimer, &PluginTimer::timeout, this, [this]() {
+            foreach (Thing *thing, myThings()) {
+                refresh(thing);
+            }
+        });
+    }
+}
+
+void IntegrationPluginOpenMeteo::executeAction(ThingActionInfo *info)
+{
+    Thing *thing = info->thing();
+
+    if (thing->thingClassId() == openMeteoSiteThingClassId
+            && info->action().actionTypeId() == openMeteoSiteRefreshWeatherActionTypeId) {
+        refresh(thing);
+        // Also refresh the child PV planes of this site.
+        foreach (Thing *child, myThings()) {
+            if (child->thingClassId() == openMeteoPvPlaneThingClassId && child->parentId() == thing->id())
+                updatePlane(child);
+        }
+    }
+
+    info->finish(Thing::ThingErrorNoError);
+}
+
+void IntegrationPluginOpenMeteo::thingRemoved(Thing *thing)
+{
+    Q_UNUSED(thing)
+    if (myThings().isEmpty() && m_pluginTimer) {
+        hardwareManager()->pluginTimerManager()->unregisterTimer(m_pluginTimer);
+        m_pluginTimer = nullptr;
+    }
+}
+
+void IntegrationPluginOpenMeteo::refresh(Thing *thing)
+{
+    if (thing->thingClassId() == openMeteoSiteThingClassId) {
+        updateSiteForecast(thing);
+        updateSiteSatellite(thing);
+    } else if (thing->thingClassId() == openMeteoPvPlaneThingClassId) {
+        updatePlane(thing);
+    }
+}
+
+bool IntegrationPluginOpenMeteo::resolveCoordinates(Thing *thing, double &latitude, double &longitude) const
+{
+    Thing *site = nullptr;
+    if (thing->thingClassId() == openMeteoSiteThingClassId) {
+        site = thing;
+    } else if (thing->thingClassId() == openMeteoPvPlaneThingClassId) {
+        site = myThings().findById(thing->parentId());
+    }
+    if (!site)
+        return false;
+
+    latitude = site->paramValue(openMeteoSiteLatitudeParamTypeId).toDouble();
+    longitude = site->paramValue(openMeteoSiteLongitudeParamTypeId).toDouble();
+    return true;
+}
+
+void IntegrationPluginOpenMeteo::updateSiteForecast(Thing *thing)
+{
+    double lat, lon;
+    if (!resolveCoordinates(thing, lat, lon))
+        return;
+
+    const QString baseUrl = configValue(openMeteoPluginBaseUrlParamTypeId).toString();
+    const QString model = configValue(openMeteoPluginWeatherModelParamTypeId).toString();
+
+    QUrl url(baseUrl + "/v1/forecast");
+    QUrlQuery query;
+    query.addQueryItem("latitude", QString::number(lat));
+    query.addQueryItem("longitude", QString::number(lon));
+    const double elevation = thing->paramValue(openMeteoSiteElevationParamTypeId).toDouble();
+    if (elevation != 0.0)
+        query.addQueryItem("elevation", QString::number(elevation));
+    query.addQueryItem("models", model);
+    query.addQueryItem("wind_speed_unit", "ms");
+    query.addQueryItem("timezone", "Europe/Paris");
+    query.addQueryItem("timeformat", "unixtime");
+    query.addQueryItem("current", "temperature_2m,wind_speed_10m,wind_direction_10m,cloud_cover,"
+                                  "relative_humidity_2m,surface_pressure,weather_code,snowfall,is_day,"
+                                  "shortwave_radiation,direct_normal_irradiance,diffuse_radiation,"
+                                  "terrestrial_radiation");
+    query.addQueryItem("daily", "temperature_2m_max,temperature_2m_min,sunrise,sunset,shortwave_radiation_sum");
+    url.setQuery(query);
+
+    qCDebug(dcOpenMeteo()) << "Requesting forecast for" << thing->name() << url.toString();
+
+    QNetworkReply *reply = hardwareManager()->networkManager()->get(QNetworkRequest(url));
+    connect(reply, &QNetworkReply::finished, reply, &QNetworkReply::deleteLater);
+    connect(reply, &QNetworkReply::finished, thing, [this, thing, reply]() {
+        if (reply->error() != QNetworkReply::NoError) {
+            qCWarning(dcOpenMeteo()) << "Forecast reply error:" << reply->errorString();
+            return;
+        }
+        QJsonParseError error;
+        QJsonDocument doc = QJsonDocument::fromJson(reply->readAll(), &error);
+        if (error.error != QJsonParseError::NoError) {
+            qCWarning(dcOpenMeteo()) << "Forecast parse error:" << error.errorString();
+            return;
+        }
+
+        const QVariantMap map = doc.toVariant().toMap();
+        const QVariantMap current = map.value("current").toMap();
+        const QVariantMap daily = map.value("daily").toMap();
+
+        if (current.contains("time"))
+            thing->setStateValue(openMeteoSiteUpdateTimeStateTypeId, current.value("time").toUInt());
+        if (current.contains("temperature_2m"))
+            thing->setStateValue(openMeteoSiteTemperatureStateTypeId, current.value("temperature_2m").toDouble());
+        if (current.contains("wind_speed_10m"))
+            thing->setStateValue(openMeteoSiteWindSpeedStateTypeId, current.value("wind_speed_10m").toDouble());
+        if (current.contains("wind_direction_10m"))
+            thing->setStateValue(openMeteoSiteWindDirectionStateTypeId, current.value("wind_direction_10m").toInt());
+        if (current.contains("cloud_cover"))
+            thing->setStateValue(openMeteoSiteCloudinessStateTypeId, current.value("cloud_cover").toInt());
+        if (current.contains("relative_humidity_2m"))
+            thing->setStateValue(openMeteoSiteHumidityStateTypeId, current.value("relative_humidity_2m").toInt());
+        if (current.contains("surface_pressure"))
+            thing->setStateValue(openMeteoSitePressureStateTypeId, current.value("surface_pressure").toDouble());
+        if (current.contains("snowfall"))
+            thing->setStateValue(openMeteoSiteSnowfallStateTypeId, current.value("snowfall").toDouble());
+        if (current.contains("shortwave_radiation"))
+            thing->setStateValue(openMeteoSiteGhiStateTypeId, current.value("shortwave_radiation").toDouble());
+        if (current.contains("direct_normal_irradiance"))
+            thing->setStateValue(openMeteoSiteDniStateTypeId, current.value("direct_normal_irradiance").toDouble());
+        if (current.contains("diffuse_radiation"))
+            thing->setStateValue(openMeteoSiteDhiStateTypeId, current.value("diffuse_radiation").toDouble());
+        if (current.contains("terrestrial_radiation"))
+            thing->setStateValue(openMeteoSiteTerrestrialRadiationStateTypeId, current.value("terrestrial_radiation").toDouble());
+
+        bool isDay = current.value("is_day").toInt() == 1;
+        if (current.contains("is_day"))
+            thing->setStateValue(openMeteoSiteDaylightStateTypeId, isDay);
+        if (current.contains("weather_code"))
+            thing->setStateValue(openMeteoSiteWeatherConditionStateTypeId,
+                                 weatherConditionFromCode(current.value("weather_code").toInt(), isDay));
+
+        // Daily arrays: take index 0 (today).
+        const QVariantList tmax = daily.value("temperature_2m_max").toList();
+        const QVariantList tmin = daily.value("temperature_2m_min").toList();
+        const QVariantList sunrise = daily.value("sunrise").toList();
+        const QVariantList sunset = daily.value("sunset").toList();
+        const QVariantList swSum = daily.value("shortwave_radiation_sum").toList();
+        if (!tmax.isEmpty())
+            thing->setStateValue(openMeteoSiteTemperatureMaxStateTypeId, tmax.first().toDouble());
+        if (!tmin.isEmpty())
+            thing->setStateValue(openMeteoSiteTemperatureMinStateTypeId, tmin.first().toDouble());
+        if (!sunrise.isEmpty())
+            thing->setStateValue(openMeteoSiteSunriseTimeStateTypeId, sunrise.first().toUInt());
+        if (!sunset.isEmpty())
+            thing->setStateValue(openMeteoSiteSunsetTimeStateTypeId, sunset.first().toUInt());
+        if (!swSum.isEmpty())
+            // Open-Meteo shortwave_radiation_sum is in MJ/m^2; expose kWh/m^2 (/ 3.6).
+            thing->setStateValue(openMeteoSiteShortwaveRadiationSumTodayStateTypeId, swSum.first().toDouble() / 3.6);
+    });
+}
+
+void IntegrationPluginOpenMeteo::updateSiteSatellite(Thing *thing)
+{
+    double lat, lon;
+    if (!resolveCoordinates(thing, lat, lon))
+        return;
+
+    const QString satelliteBaseUrl = configValue(openMeteoPluginSatelliteBaseUrlParamTypeId).toString();
+
+    // Observation product (geostationary satellite). Used for the observed GHI and the
+    // native clear-sky -> clear-sky index (kt). Observation only, no forward forecast.
+    // TODO(verify): confirm the satellite endpoint supports "current="; otherwise switch to
+    // "hourly=" and take the latest non-null sample.
+    QUrl url(satelliteBaseUrl + "/v1/archive");
+    QUrlQuery query;
+    query.addQueryItem("latitude", QString::number(lat));
+    query.addQueryItem("longitude", QString::number(lon));
+    query.addQueryItem("models", "satellite_radiation_seamless");
+    query.addQueryItem("timezone", "Europe/Paris");
+    query.addQueryItem("timeformat", "unixtime");
+    query.addQueryItem("current", "shortwave_radiation,shortwave_radiation_clear_sky");
+    url.setQuery(query);
+
+    qCDebug(dcOpenMeteo()) << "Requesting satellite observation for" << thing->name() << url.toString();
+
+    QNetworkReply *reply = hardwareManager()->networkManager()->get(QNetworkRequest(url));
+    connect(reply, &QNetworkReply::finished, reply, &QNetworkReply::deleteLater);
+    connect(reply, &QNetworkReply::finished, thing, [this, thing, reply]() {
+        if (reply->error() != QNetworkReply::NoError) {
+            qCWarning(dcOpenMeteo()) << "Satellite reply error:" << reply->errorString();
+            return;
+        }
+        QJsonParseError error;
+        QJsonDocument doc = QJsonDocument::fromJson(reply->readAll(), &error);
+        if (error.error != QJsonParseError::NoError) {
+            qCWarning(dcOpenMeteo()) << "Satellite parse error:" << error.errorString();
+            return;
+        }
+
+        const QVariantMap current = doc.toVariant().toMap().value("current").toMap();
+        double ghiObs = current.value("shortwave_radiation").toDouble();
+        double clearSky = current.value("shortwave_radiation_clear_sky").toDouble();
+
+        if (current.contains("shortwave_radiation"))
+            thing->setStateValue(openMeteoSiteGhiObservedStateTypeId, ghiObs);
+        if (current.contains("shortwave_radiation_clear_sky"))
+            thing->setStateValue(openMeteoSiteClearSkyGhiStateTypeId, clearSky);
+
+        // Clear-sky index kt = GHI_observed / GHI_clearsky, with a night guard.
+        double kt = 0.0;
+        if (clearSky > 20.0)
+            kt = qBound(0.0, ghiObs / clearSky, 1.2);
+        thing->setStateValue(openMeteoSiteClearSkyIndexStateTypeId, kt);
+    });
+}
+
+void IntegrationPluginOpenMeteo::updatePlane(Thing *thing)
+{
+    double lat, lon;
+    if (!resolveCoordinates(thing, lat, lon))
+        return;
+
+    const QString baseUrl = configValue(openMeteoPluginBaseUrlParamTypeId).toString();
+    const QString model = configValue(openMeteoPluginWeatherModelParamTypeId).toString();
+
+    const double tilt = thing->paramValue(openMeteoPvPlaneTiltParamTypeId).toDouble();
+    // Stored azimuth is geographic (180 = South). Open-Meteo expects 0 = South,
+    // -90 = East, +90 = West. Convert here (see ARCHITECTURE.md, conventions).
+    const double azimuthOm = thing->paramValue(openMeteoPvPlaneAzimuthParamTypeId).toDouble() - 180.0;
+
+    QUrl url(baseUrl + "/v1/forecast");
+    QUrlQuery query;
+    query.addQueryItem("latitude", QString::number(lat));
+    query.addQueryItem("longitude", QString::number(lon));
+    query.addQueryItem("models", model);
+    query.addQueryItem("timezone", "Europe/Paris");
+    query.addQueryItem("timeformat", "unixtime");
+    query.addQueryItem("tilt", QString::number(tilt));
+    query.addQueryItem("azimuth", QString::number(azimuthOm));
+    query.addQueryItem("current", "global_tilted_irradiance");
+    url.setQuery(query);
+
+    qCDebug(dcOpenMeteo()) << "Requesting GTI for plane" << thing->name() << url.toString();
+
+    QNetworkReply *reply = hardwareManager()->networkManager()->get(QNetworkRequest(url));
+    connect(reply, &QNetworkReply::finished, reply, &QNetworkReply::deleteLater);
+    connect(reply, &QNetworkReply::finished, thing, [this, thing, reply]() {
+        if (reply->error() != QNetworkReply::NoError) {
+            qCWarning(dcOpenMeteo()) << "GTI reply error:" << reply->errorString();
+            return;
+        }
+        QJsonParseError error;
+        QJsonDocument doc = QJsonDocument::fromJson(reply->readAll(), &error);
+        if (error.error != QJsonParseError::NoError) {
+            qCWarning(dcOpenMeteo()) << "GTI parse error:" << error.errorString();
+            return;
+        }
+
+        const QVariantMap current = doc.toVariant().toMap().value("current").toMap();
+        if (current.contains("global_tilted_irradiance"))
+            thing->setStateValue(openMeteoPvPlaneGtiNowStateTypeId, current.value("global_tilted_irradiance").toDouble());
+        if (current.contains("time"))
+            thing->setStateValue(openMeteoPvPlaneUpdateTimeStateTypeId, current.value("time").toUInt());
+    });
+}
+
+QString IntegrationPluginOpenMeteo::weatherConditionFromCode(int code, bool isDay) const
+{
+    // WMO weather interpretation codes -> weatherCondition enum (see metadata possibleValues).
+    switch (code) {
+    case 0:
+        return isDay ? "clear-day" : "clear-night";
+    case 1:
+    case 2:
+        return isDay ? "few-clouds-day" : "few-clouds-night";
+    case 3:
+        return "overcast";
+    case 45:
+    case 48:
+        return "fog";
+    case 51: case 53: case 55: case 56: case 57:
+        return "light-rain";
+    case 61: case 63: case 65: case 66: case 67:
+    case 80: case 81: case 82:
+        return "shower-rain";
+    case 71: case 73: case 75: case 77:
+    case 85: case 86:
+        return "snow";
+    case 95: case 96: case 99:
+        return "thunderstorm";
+    default:
+        return "clouds";
+    }
+}
diff --git a/openmeteo/integrationpluginopenmeteo.h b/openmeteo/integrationpluginopenmeteo.h
new file mode 100644
index 00000000..5d3273e7
--- /dev/null
+++ b/openmeteo/integrationpluginopenmeteo.h
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+*
+* Copyright (C) 2026, ETM-Schurig SARL
+*
+* This file is part of etm-powersync-plugins.
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program. If not, see <https://www.gnu.org/licenses/>.
+*
+* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef INTEGRATIONPLUGINOPENMETEO_H
+#define INTEGRATIONPLUGINOPENMETEO_H
+
+#include <integrations/integrationplugin.h>
+#include <plugintimer.h>
+
+class IntegrationPluginOpenMeteo : public IntegrationPlugin
+{
+    Q_OBJECT
+
+    Q_PLUGIN_METADATA(IID "io.nymea.IntegrationPlugin" FILE "integrationpluginopenmeteo.json")
+    Q_INTERFACES(IntegrationPlugin)
+
+public:
+    explicit IntegrationPluginOpenMeteo();
+
+    void init() override;
+    void setupThing(ThingSetupInfo *info) override;
+    void executeAction(ThingActionInfo *info) override;
+    void thingRemoved(Thing *thing) override;
+
+private:
+    PluginTimer *m_pluginTimer = nullptr;
+
+    // Refresh dispatch
+    void refresh(Thing *thing);
+
+    // Site (parent): two requests — forecast (Meteo-France) + satellite observation (MTG)
+    void updateSiteForecast(Thing *thing);
+    void updateSiteSatellite(Thing *thing);
+
+    // PV plane (child): one GTI request, using the parent site coordinates
+    void updatePlane(Thing *thing);
+
+    // WMO weather_code -> weatherCondition enum value (with -day/-night via isDay)
+    QString weatherConditionFromCode(int code, bool isDay) const;
+
+    // Helper: resolve the site coordinates for a thing (site itself, or a plane's parent)
+    bool resolveCoordinates(Thing *thing, double &latitude, double &longitude) const;
+};
+
+#endif // INTEGRATIONPLUGINOPENMETEO_H
diff --git a/openmeteo/integrationpluginopenmeteo.json b/openmeteo/integrationpluginopenmeteo.json
new file mode 100644
index 00000000..7688f925
--- /dev/null
+++ b/openmeteo/integrationpluginopenmeteo.json
@@ -0,0 +1,353 @@
+{
+    "name": "OpenMeteo",
+    "displayName": "Open-Meteo",
+    "id": "d1ed979d-b802-463e-a51f-fef79245cfdc",
+    "paramTypes": [
+        {
+            "id": "590cf57d-c1ca-4645-a443-7c5a6c97db93",
+            "name": "baseUrl",
+            "displayName": "Base URL (forecast)",
+            "type": "QString",
+            "defaultValue": "https://api.open-meteo.com"
+        },
+        {
+            "id": "6cd410dc-7f1c-4681-8e47-8df525252d2d",
+            "name": "satelliteBaseUrl",
+            "displayName": "Base URL (satellite radiation)",
+            "type": "QString",
+            "defaultValue": "https://satellite-api.open-meteo.com"
+        },
+        {
+            "id": "f904db60-527a-47b2-9dc5-371ac5f7e164",
+            "name": "weatherModel",
+            "displayName": "Forecast model",
+            "type": "QString",
+            "defaultValue": "meteofrance_seamless"
+        }
+    ],
+    "vendors": [
+        {
+            "name": "openMeteo",
+            "displayName": "Open-Meteo",
+            "id": "b1f520ea-dcac-4b16-8cab-89204a225c1b",
+            "thingClasses": [
+                {
+                    "id": "59e23cb4-4820-45d4-9c2e-e7bc7b8c7ca6",
+                    "name": "openMeteoSite",
+                    "displayName": "Open-Meteo site",
+                    "interfaces": [
+                        "weather",
+                        "daylightsensor"
+                    ],
+                    "createMethods": [
+                        "user"
+                    ],
+                    "paramTypes": [
+                        {
+                            "id": "cc7f6cde-c3dd-4924-be5e-a014e20df624",
+                            "name": "name",
+                            "displayName": "Name",
+                            "type": "QString",
+                            "inputType": "TextLine",
+                            "defaultValue": ""
+                        },
+                        {
+                            "id": "28b4574a-19ea-41d2-9e58-51f0de11165b",
+                            "name": "latitude",
+                            "displayName": "Latitude",
+                            "type": "double",
+                            "defaultValue": 48.9
+                        },
+                        {
+                            "id": "8bb8ca04-7a28-4cf5-8a4d-1e1081e75c4b",
+                            "name": "longitude",
+                            "displayName": "Longitude",
+                            "type": "double",
+                            "defaultValue": 7.85
+                        },
+                        {
+                            "id": "eb16b64a-588f-4d45-b50a-3ca6bc3decc2",
+                            "name": "elevation",
+                            "displayName": "Elevation (m, optional)",
+                            "type": "double",
+                            "defaultValue": 0
+                        }
+                    ],
+                    "actionTypes": [
+                        {
+                            "id": "d31b0484-0149-4dcd-92dc-408392cc5ec3",
+                            "name": "refreshWeather",
+                            "displayName": "Refresh"
+                        }
+                    ],
+                    "stateTypes": [
+                        {
+                            "id": "3ac82ea4-b824-4c0c-8ca9-216a1fc9c587",
+                            "name": "weatherCondition",
+                            "displayName": "Weather condition",
+                            "displayNameEvent": "Weather condition changed",
+                            "type": "QString",
+                            "defaultValue": "clear-day",
+                            "possibleValues": [
+                                "clear-day",
+                                "clear-night",
+                                "few-clouds-day",
+                                "few-clouds-night",
+                                "clouds",
+                                "overcast",
+                                "light-rain",
+                                "shower-rain",
+                                "thunderstorm",
+                                "snow",
+                                "fog"
+                            ]
+                        },
+                        {
+                            "id": "ed48e3ed-f3fd-4401-9b62-0766d7f5d315",
+                            "name": "updateTime",
+                            "displayName": "Last update",
+                            "displayNameEvent": "Last update changed",
+                            "type": "int",
+                            "defaultValue": 0,
+                            "unit": "UnixTime"
+                        },
+                        {
+                            "id": "b0089fa5-fe4b-4dfc-a1ed-dbd85ca75b20",
+                            "name": "temperature",
+                            "displayName": "Temperature",
+                            "displayNameEvent": "Temperature changed",
+                            "type": "double",
+                            "defaultValue": 0,
+                            "unit": "DegreeCelsius"
+                        },
+                        {
+                            "id": "348879d1-0433-416f-a9ce-a05d522a2d26",
+                            "name": "temperatureMin",
+                            "displayName": "Minimum temperature (today)",
+                            "displayNameEvent": "Minimum temperature (today) changed",
+                            "type": "double",
+                            "defaultValue": 0,
+                            "unit": "DegreeCelsius"
+                        },
+                        {
+                            "id": "6530fa30-d1bf-4f84-9a2f-30f1aa65e130",
+                            "name": "temperatureMax",
+                            "displayName": "Maximum temperature (today)",
+                            "displayNameEvent": "Maximum temperature (today) changed",
+                            "type": "double",
+                            "defaultValue": 0,
+                            "unit": "DegreeCelsius"
+                        },
+                        {
+                            "id": "36413dbc-245b-4067-b5dc-41e71b37c0e9",
+                            "name": "humidity",
+                            "displayName": "Humidity",
+                            "displayNameEvent": "Humidity changed",
+                            "type": "int",
+                            "defaultValue": 0,
+                            "unit": "Percentage"
+                        },
+                        {
+                            "id": "6bf903e5-6c04-492b-bc43-00db60d2edf4",
+                            "name": "pressure",
+                            "displayName": "Pressure",
+                            "displayNameEvent": "Pressure changed",
+                            "type": "double",
+                            "defaultValue": 0,
+                            "unit": "HectoPascal"
+                        },
+                        {
+                            "id": "41ec4108-3651-4162-b782-c957e14355b9",
+                            "name": "windSpeed",
+                            "displayName": "Wind speed",
+                            "displayNameEvent": "Wind speed changed",
+                            "type": "double",
+                            "defaultValue": 0,
+                            "unit": "MeterPerSecond"
+                        },
+                        {
+                            "id": "d64aa5ab-0b1a-477d-95a6-11b755154d88",
+                            "name": "windDirection",
+                            "displayName": "Wind direction",
+                            "displayNameEvent": "Wind direction changed",
+                            "type": "int",
+                            "defaultValue": 0,
+                            "unit": "Degree"
+                        },
+                        {
+                            "id": "758af353-7e2b-4073-961f-77c5f8bd3b32",
+                            "name": "cloudiness",
+                            "displayName": "Cloudiness",
+                            "displayNameEvent": "Cloudiness changed",
+                            "type": "int",
+                            "defaultValue": 0,
+                            "unit": "Percentage"
+                        },
+                        {
+                            "id": "175bf804-9881-4272-a83f-fb81a9a029b3",
+                            "name": "snowfall",
+                            "displayName": "Snowfall (preceding hour)",
+                            "displayNameEvent": "Snowfall (preceding hour) changed",
+                            "type": "double",
+                            "defaultValue": 0,
+                            "unit": "CentiMeter"
+                        },
+                        {
+                            "id": "c8325cc4-de67-4581-a3d7-8248ecbd70e9",
+                            "name": "ghi",
+                            "displayName": "GHI forecast (W/m2)",
+                            "displayNameEvent": "GHI forecast (W/m2) changed",
+                            "type": "double",
+                            "defaultValue": 0
+                        },
+                        {
+                            "id": "0b0c5565-e5c5-4927-8a89-1e6b05c19250",
+                            "name": "dni",
+                            "displayName": "DNI forecast (W/m2)",
+                            "displayNameEvent": "DNI forecast (W/m2) changed",
+                            "type": "double",
+                            "defaultValue": 0
+                        },
+                        {
+                            "id": "67e64a1f-3dfa-46fa-8438-89df0f7f5c2e",
+                            "name": "dhi",
+                            "displayName": "DHI forecast (W/m2)",
+                            "displayNameEvent": "DHI forecast (W/m2) changed",
+                            "type": "double",
+                            "defaultValue": 0
+                        },
+                        {
+                            "id": "c9681fca-1020-4138-8d6e-d6d73d5a002e",
+                            "name": "terrestrialRadiation",
+                            "displayName": "TOA radiation (W/m2)",
+                            "displayNameEvent": "TOA radiation (W/m2) changed",
+                            "type": "double",
+                            "defaultValue": 0
+                        },
+                        {
+                            "id": "a25a9740-749e-455a-b4e7-60fff3d402f3",
+                            "name": "shortwaveRadiationSumToday",
+                            "displayName": "GHI sum today (kWh/m2)",
+                            "displayNameEvent": "GHI sum today (kWh/m2) changed",
+                            "type": "double",
+                            "defaultValue": 0
+                        },
+                        {
+                            "id": "de0f16e8-8e88-4aa7-b00f-c744e1e13072",
+                            "name": "ghiObserved",
+                            "displayName": "GHI observed sat (W/m2)",
+                            "displayNameEvent": "GHI observed sat (W/m2) changed",
+                            "type": "double",
+                            "defaultValue": 0
+                        },
+                        {
+                            "id": "a8d0074b-5696-464b-a9c6-7da16f3cd021",
+                            "name": "clearSkyGhi",
+                            "displayName": "Clear-sky GHI sat (W/m2)",
+                            "displayNameEvent": "Clear-sky GHI sat (W/m2) changed",
+                            "type": "double",
+                            "defaultValue": 0
+                        },
+                        {
+                            "id": "c6b6ccb6-a5cb-458a-bb7d-9dd6f818a962",
+                            "name": "clearSkyIndex",
+                            "displayName": "Clear-sky index kt",
+                            "displayNameEvent": "Clear-sky index kt changed",
+                            "type": "double",
+                            "defaultValue": 0
+                        },
+                        {
+                            "id": "2c6918d0-9758-4c71-b75b-1f08c3701ddf",
+                            "name": "sunriseTime",
+                            "displayName": "Sunrise time",
+                            "displayNameEvent": "Sunrise time changed",
+                            "type": "int",
+                            "defaultValue": 0,
+                            "unit": "UnixTime"
+                        },
+                        {
+                            "id": "c005cf92-1e29-4033-a65b-578d5d541240",
+                            "name": "sunsetTime",
+                            "displayName": "Sunset time",
+                            "displayNameEvent": "Sunset time changed",
+                            "type": "int",
+                            "defaultValue": 0,
+                            "unit": "UnixTime"
+                        },
+                        {
+                            "id": "291eea88-0a6d-4ca2-be1c-8a291cfbbdef",
+                            "name": "daylight",
+                            "displayName": "Daylight",
+                            "displayNameEvent": "Daylight changed",
+                            "type": "bool",
+                            "defaultValue": false
+                        }
+                    ]
+                },
+                {
+                    "id": "fdfb5cb3-e5da-49d1-8d4e-1a316a68061a",
+                    "name": "openMeteoPvPlane",
+                    "displayName": "Open-Meteo PV plane",
+                    "interfaces": [],
+                    "createMethods": [
+                        "user"
+                    ],
+                    "paramTypes": [
+                        {
+                            "id": "f5c6d83f-32a2-4cf8-85ae-137eb9c60635",
+                            "name": "name",
+                            "displayName": "Name",
+                            "type": "QString",
+                            "inputType": "TextLine",
+                            "defaultValue": ""
+                        },
+                        {
+                            "id": "e2914db5-d5d6-4c7b-9da6-5fba8a49e023",
+                            "name": "tilt",
+                            "displayName": "Tilt (deg, 0=horizontal)",
+                            "type": "double",
+                            "minValue": 0,
+                            "maxValue": 90,
+                            "defaultValue": 30
+                        },
+                        {
+                            "id": "ecba346a-e5f5-4264-92ab-a92a8fb2cf38",
+                            "name": "azimuth",
+                            "displayName": "Azimuth (deg geographic, 180=South)",
+                            "type": "double",
+                            "minValue": 0,
+                            "maxValue": 360,
+                            "defaultValue": 180
+                        },
+                        {
+                            "id": "a8291abd-8106-49a1-868e-8907e16bba8a",
+                            "name": "kwp",
+                            "displayName": "Peak power kWp",
+                            "type": "double",
+                            "defaultValue": 0
+                        }
+                    ],
+                    "stateTypes": [
+                        {
+                            "id": "e0efeb24-d63c-48d7-93d7-34174c9f4e15",
+                            "name": "gtiNow",
+                            "displayName": "GTI current (W/m2)",
+                            "displayNameEvent": "GTI current (W/m2) changed",
+                            "type": "double",
+                            "defaultValue": 0
+                        },
+                        {
+                            "id": "95ed4db9-a231-41bb-b313-78735b63fe9c",
+                            "name": "updateTime",
+                            "displayName": "Last update",
+                            "displayNameEvent": "Last update changed",
+                            "type": "int",
+                            "defaultValue": 0,
+                            "unit": "UnixTime"
+                        }
+                    ]
+                }
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/openmeteo/meta.json b/openmeteo/meta.json
new file mode 100644
index 00000000..846c8516
--- /dev/null
+++ b/openmeteo/meta.json
@@ -0,0 +1,14 @@
+{
+    "title": "OpenMeteo",
+    "tagline": "Get current weather data for your location.",
+    "icon": "openmeteo.png",
+    "stability": "consumer",
+    "offline": false,
+    "technologies": [
+        "cloud"
+    ],
+    "categories": [
+        "weather",
+        "online-service"
+    ]
+}
diff --git a/openmeteo/openmeteo.png b/openmeteo/openmeteo.png
new file mode 100644
index 00000000..029a30bf
Binary files /dev/null and b/openmeteo/openmeteo.png differ
diff --git a/openmeteo/openmeteo.pro b/openmeteo/openmeteo.pro
new file mode 100644
index 00000000..1ff8fc73
--- /dev/null
+++ b/openmeteo/openmeteo.pro
@@ -0,0 +1,9 @@
+include(../plugins.pri)
+
+QT *= network
+
+SOURCES += \
+    integrationpluginopenmeteo.cpp
+
+HEADERS += \
+    integrationpluginopenmeteo.h