The HVAC service is a service dummy allowing to control the state of the A/C and the desired cabin temperature. "Dummy" means, that changes of those two states are just forwarded and reflected as two respective data points in the data broker.
+----------------+
| |
----( O------| Data broker |-----O )------
| Broker | | Collector |
| +----------------+ |
| |
| |
+-----------------+ +----------------+
| | | |
| HVAC client |-----------( O-----------| HVAC service |
| | HVAC | |
+-----------------+ service +----------------+
| parameter | default value | Env var | description |
|---|---|---|---|
| listen_address | "127.0.0.1:50052" |
HVAC_ADDR |
Listen for rpc calls |
| broker_address | "127.0.0.1:55555" |
"127.0.0.1:$DAPR_GRPC_PORT" (if DAPR_GRPC_PORT is set)VDB_ADDRESS (else) |
Connect to data broker instance |
| broker_app_id | "vehicledatabroker" |
VEHICLEDATABROKER_DAPR_APP_ID |
Connect to data broker instance |
Configuration options have the following priority (highest at top):
- environment variable
- default value
Databroker must have been started.
$ pip install -r requirements.txt
$ ./hvacservice.py
INFO:hvac_service:Connecting to Data Broker [127.0.0.1:55555]
INFO:hvac_service:Starting HVAC Service on 0.0.0.0:50052
INFO:hvac_service:Using gRPC metadata: None
INFO:hvac_service:[127.0.0.1:55555] Connectivity changed to: ChannelConnectivity.IDLE
INFO:hvac_service:Connected to data broker
INFO:hvac_service:Try register datapoints
INFO:hvac_service:datapoints are registered.
...A dev-container exist, you still need to do pip install before starting hvac_service.