diff --git a/app.go b/app.go
index ef3e25f..49f70e6 100644
--- a/app.go
+++ b/app.go
@@ -18,6 +18,8 @@ package main
 import (
 	"booking-app/apiserver"
 	"booking-app/apiservices"
+	"booking-app/conf"
+	"booking-app/eliona"
 	"context"
 	"net/http"
 
@@ -28,6 +30,37 @@ import (
 	"github.com/eliona-smart-building-assistant/go-utils/log"
 )
 
+func manageOccupancy() {
+	common.RunOnce(func() {
+		if err := updateOccupancy(); err != nil {
+			return // Error is handled in the method itself.
+		}
+	}, 1)
+}
+
+func updateOccupancy() error {
+	ctx := context.Background()
+	bookedAssets, err := conf.GetBookedAssetIDs(ctx)
+	if err != nil {
+		log.Error("conf", "getting booked asset IDs: %v", err)
+		return err
+	}
+	if err := eliona.SetAssetsBooked(true, bookedAssets); err != nil {
+		log.Error("eliona", "setting booked assets: %v", err)
+		return err
+	}
+	unbookedAssets, err := conf.GetUnbookedAssetIDs(ctx)
+	if err != nil {
+		log.Error("conf", "getting booked asset IDs: %v", err)
+		return err
+	}
+	if err := eliona.SetAssetsBooked(false, unbookedAssets); err != nil {
+		log.Error("eliona", "setting unbooked assets: %v", err)
+		return err
+	}
+	return nil
+}
+
 func initialization() {
 	ctx := context.Background()
 
diff --git a/conf/conf.go b/conf/conf.go
index 30458a2..6fdf860 100644
--- a/conf/conf.go
+++ b/conf/conf.go
@@ -26,6 +26,7 @@ import (
 
 	"github.com/volatiletech/null/v8"
 	"github.com/volatiletech/sqlboiler/v4/boil"
+	"github.com/volatiletech/sqlboiler/v4/queries"
 	"github.com/volatiletech/sqlboiler/v4/queries/qm"
 )
 
@@ -181,3 +182,76 @@ func CancelEvent(ctx context.Context, eventID int64) error {
 
 	return nil
 }
+
+// func GetCurrentEvents(ctx context.Context) ([]apiserver.Booking, error) {
+// 	since := time.Now()
+// 	until := since.Add(30 * time.Minute)
+// 	events, err := appdb.Events(
+// 		appdb.EventWhere.CancelledAt.IsNull(),
+// 		appdb.EventWhere.EndTime.GTE(since),
+// 		appdb.EventWhere.StartTime.LTE(until),
+// 	).AllG(ctx)
+// 	if err != nil {
+// 		return nil, fmt.Errorf("fetching events for asset: %v", err)
+// 	}
+// 	var apiBookings []apiserver.Booking
+// 	for _, e := range events {
+// 		b, err := dbEventToAPIBooking(ctx, *e)
+// 		if err != nil {
+// 			return nil, fmt.Errorf("dbEvent to API booking: %v", err)
+// 		}
+// 		apiBookings = append(apiBookings, b)
+// 	}
+// 	return apiBookings, nil
+// }
+
+type AssetID struct {
+	AssetID int32 `boil:"asset_id"`
+}
+
+func GetBookedAssetIDs(ctx context.Context) ([]int32, error) {
+	since := time.Now()
+	until := since.Add(30 * time.Minute)
+	var assetIDs []*AssetID
+	if err := queries.
+		RawG(`
+			SELECT DISTINCT er.asset_id
+			FROM booking.event_resource er
+			JOIN booking.event e ON e.id = er.event_id
+			WHERE e.cancelled_at IS NULL
+				AND e.start_time <= $1
+				AND e.end_time >= $2
+			`, until, since).
+		BindG(ctx, &assetIDs); err != nil {
+		return nil, fmt.Errorf("querying booked asset IDs: %v", err)
+	}
+
+	ids := make([]int32, len(assetIDs))
+	for i, assetID := range assetIDs {
+		ids[i] = assetID.AssetID
+	}
+	return ids, nil
+}
+
+func GetUnbookedAssetIDs(ctx context.Context) ([]int32, error) {
+	since := time.Now()
+	until := since.Add(30 * time.Minute)
+	var assetIDs []*AssetID
+	if err := queries.
+		RawG(`
+			SELECT DISTINCT er.asset_id
+			FROM booking.event_resource er
+			JOIN booking.event e ON e.id = er.event_id
+			WHERE e.cancelled_at IS NOT NULL
+				OR e.start_time > $1
+				OR e.end_time < $2
+			`, until, since).
+		BindG(ctx, &assetIDs); err != nil {
+		return nil, fmt.Errorf("querying unbooked asset IDs: %v", err)
+	}
+	ids := make([]int32, len(assetIDs))
+	for i, assetID := range assetIDs {
+		ids[i] = assetID.AssetID
+	}
+	return ids, nil
+}
diff --git a/eliona/data.go b/eliona/data.go
new file mode 100644
index 0000000..e9f3054
--- /dev/null
+++ b/eliona/data.go
@@ -0,0 +1,46 @@
+//  This file is part of the eliona project.
+//  Copyright © 2022 LEICOM iTEC AG. All Rights Reserved.
+//  ______ _ _
+// |  ____| (_)
+// | |__  | |_  ___  _ __   __ _
+// |  __| | | |/ _ \| '_ \ / _` |
+// | |____| | | (_) | | | | (_| |
+// |______|_|_|\___/|_| |_|\__,_|
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+//  BUT NOT LIMITED  TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+//  NON INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+//  DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+package eliona
+
+import (
+	"fmt"
+
+	"github.com/eliona-smart-building-assistant/go-eliona/asset"
+)
+
+const ClientReference string = "booking-app"
+
+type BookableAsset struct {
+	Occupancy int `eliona:"occupancy" subtype:"input"`
+}
+
+func SetAssetsBooked(booked bool, assetIDs []int32) error {
+	occupancy := 0
+	if booked {
+		occupancy = 1
+	}
+	for _, assetID := range assetIDs {
+		data := asset.Data{
+			AssetId:         assetID,
+			Data:            BookableAsset{Occupancy: occupancy},
+			ClientReference: ClientReference,
+		}
+		if err := asset.UpsertAssetDataIfAssetExists(data); err != nil {
+			return fmt.Errorf("upserting data: %v", err)
+		}
+	}
+	return nil
+}
diff --git a/main.go b/main.go
index 4b1e0b3..f2040ea 100644
--- a/main.go
+++ b/main.go
@@ -16,6 +16,8 @@
 package main
 
 import (
+	"time"
+
 	"github.com/eliona-smart-building-assistant/go-eliona/app"
 	"github.com/eliona-smart-building-assistant/go-utils/common"
 	"github.com/eliona-smart-building-assistant/go-utils/db"
@@ -44,6 +46,7 @@ func main() {
 	// Starting the service to collect the data for this app.
 	common.WaitForWithOs(
 		listenApi,
+		common.Loop(manageOccupancy, time.Second),
 	)
 
 	log.Info("main", "Terminate the app.")