Hands-on Azure Digital Twins Read Online • Reliable

# Upload models az dt model create --adt-name adt-warehouse-<unique> \ --models models/*.json az dt model list --adt-name adt-warehouse-<unique> -o table

# Warehouse contains Zones az dt twin relationship create --adt-name adt-warehouse-<unique> \ --twin-id "WarehouseMain" \ --relationship-id "rel-wh-to-rcv" \ --relationship "contains" \ --target "ZoneReceiving" az dt twin relationship create --adt-name adt-warehouse-<unique> --twin-id "ZoneReceiving" --relationship-id "rel-zone-to-shelf" --relationship "contains" --target "ShelfA" Zone has Sensor az dt twin relationship create --adt-name adt-warehouse-<unique> --twin-id "ZoneReceiving" --relationship-id "rel-zone-to-temp" --relationship "hasSensor" --target "TempSensor-Rcv" hands-on azure digital twins read online

# Create twins az dt twin create --adt-name adt-warehouse-<unique> \ --dtid "WarehouseMain" \ --dtmi "dtmi:handsOn:Warehouse;1" az dt twin create --adt-name adt-warehouse-<unique> --dtid "ZoneReceiving" --dtmi "dtmi:handsOn:Zone;1" # Upload models az dt model create --adt-name

Now create the actual twins (instances): \ --dtid "WarehouseMain" \ --dtmi "dtmi:handsOn:Warehouse

# --- Compute Logic --- # If temp > 30C, find the parent Zone and mark it as "overheated" if new_temp > 30.0: # Query to find parent Zone query = f"SELECT zone FROM digitaltwins zone JOIN sensor RELATED zone.hasSensor WHERE sensor.$dtId = 'sensor_id'" zones = service_client.query_twins(query) for zone in zones: # Add a computed property zone_patch = ["op": "add", "path": "/alert", "value": "Overheating"] service_client.update_digital_twin(zone['$dtId'], zone_patch) logging.info(f"Alert set on zone zone['$dtId']")