Error message during startup

[krusta4711]

Hi,

I try to connect my very first device (Siemens dishwasher). Creating the devices.json worked fine. But when starting docker compose -f compose.yaml up I get following error message:

app-1  | Hello devices_file='/app/config/devices.json' mqtt_host='http://192.x.y.z' mqtt_prefix='homeconnect/' mqtt_port=1883 mqtt_username=None mqtt_password=None mqtt_ssl=False mqtt_cafile=None mqtt_certfile=None mqtt_keyfile=None mqtt_clientname='hcpy'domain_suffix='' debug=False ha_discovery=True
app-1  | Traceback (most recent call last):
app-1  |   File "/app/hc2mqtt.py", line 274, in <module>
app-1  |     hc2mqtt(auto_envvar_prefix="HCPY")
app-1  |     ~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
app-1  |   File "/usr/local/lib/python3.13/site-packages/click/core.py", line 1442, in __call__
app-1  |     return self.main(*args, **kwargs)
app-1  |            ~~~~~~~~~^^^^^^^^^^^^^^^^^
app-1  |   File "/usr/local/lib/python3.13/site-packages/click/core.py", line 1363, in main
app-1  |     rv = self.invoke(ctx)
app-1  |   File "/usr/local/lib/python3.13/site-packages/click/core.py", line 1226, in invoke
app-1  |     return ctx.invoke(self.callback, **ctx.params)
app-1  |            ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
app-1  |   File "/usr/local/lib/python3.13/site-packages/click/core.py", line 794, in invoke
app-1  |     return callback(*args, **kwargs)
app-1  |   File "/app/hc2mqtt.py", line 166, in hc2mqtt
app-1  |     client.connect(host=mqtt_host, port=mqtt_port, keepalive=70)
app-1  |     ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
app-1  |   File "/usr/local/lib/python3.13/site-packages/paho/mqtt/client.py", line 914, in connect
app-1  |     return self.reconnect()
app-1  |            ~~~~~~~~~~~~~~^^
app-1  |   File "/usr/local/lib/python3.13/site-packages/paho/mqtt/client.py", line 1044, in reconnect
app-1  |     sock = self._create_socket_connection()
app-1  |   File "/usr/local/lib/python3.13/site-packages/paho/mqtt/client.py", line 3685, in _create_socket_connection
app-1  |     return socket.create_connection(addr, timeout=self._connect_timeout, source_address=source)
app-1  |            ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
app-1  |   File "/usr/local/lib/python3.13/socket.py", line 840, in create_connection
app-1  |     for res in getaddrinfo(host, port, 0, SOCK_STREAM):
app-1  |                ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^
app-1  |   File "/usr/local/lib/python3.13/socket.py", line 977, in getaddrinfo
app-1  |     for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
app-1  |                ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
app-1  | socket.gaierror: [Errno -2] Name or service not known
app-1 exited with code 0

Seems like connection to MQTT does not work. But my MQTT is up and running and is simple (no user+password or tls or certificate).

This is my config.ini file (of course with numbers as IP, not x y z):

devices_file = "/app/config/devices.json"
mqtt_host = "192.x.y.z"
mqtt_port = 1883
mqtt_prefix = "homeconnect/"
mqtt_ssl = False
mqtt_cafile = None
mqtt_certfile = None
mqtt_keyfile = None
mqtt_clientname="hcpy"
ha_discovery = True

Any advises?

[krusta4711]

I found the reason:
The http:// is wrong for the MQTT host. Without http it does work.

[krusta4711]

Ok, I was too fast with closing this discussion. HCPY does run now, but logs errors:

app-1  | 2025-07-14 13:58:59.748448 MQTT connection established: 0
app-1  | 2025-07-14 13:58:59.748554 dishwasher set topic: homeconnect/dishwasher/set
app-1  | 2025-07-14 13:58:59.748744 dishwasher program topic: homeconnect/dishwasher/activeProgram
app-1  | 2025-07-14 13:58:59.748804 dishwasher program topic: homeconnect/dishwasher/selectedProgram
app-1  | 2025-07-14 13:59:02.748580 dishwasher connecting to SIEMENS-Dishwasher-xxxxyyyzzzz
app-1  | 2025-07-14 13:59:06.767695 dishwasher ERROR [Errno -2] Name or service not known
app-1  | 2025-07-14 13:59:14.749030 HADiscovery - unable to load config/discovery.yaml
app-1  |         [Errno 2] No such file or directory: 'config/discovery.yaml'
app-1  | 2025-07-14 13:59:14.749093 HADiscovery - loading fallback discovery.yaml file
app-1  | 2025-07-14 13:59:14.767122 HADiscovery - publishing MQTT discovery for dishwasher
app-1  | 2025-07-14 14:00:06.768317 dishwasher connecting to SIEMENS-Dishwasher-xxxxyyyzzzz
app-1  | 2025-07-14 14:00:10.789659 dishwasher ERROR [Errno -2] Name or service not known
app-1  | 2025-07-14 14:01:10.790358 dishwasher connecting to SIEMENS-Dishwasher-xxxxyyyzzzz
app-1  | 2025-07-14 14:01:10.962208 dishwasher ERROR [Errno -2] Name or service not known
app-1  | 2025-07-14 14:02:10.963049 dishwasher connecting to SIEMENS-Dishwasher-xxxxyyyzzzz
app-1  | 2025-07-14 14:02:11.001606 dishwasher ERROR [Errno -2] Name or service not known
app-1  | 2025-07-14 14:03:11.002260 dishwasher connecting to SIEMENS-Dishwasher-xxxxyyyzzzz
app-1  | 2025-07-14 14:03:11.059762 dishwasher ERROR [Errno -2] Name or service not known
app-1  | 2025-07-14 14:04:11.060398 dishwasher connecting to SIEMENS-Dishwasher-xxxxyyyzzzz
app-1  | 2025-07-14 14:04:11.100455 dishwasher ERROR [Errno -2] Name or service not known
app-1  | 2025-07-14 14:05:11.101155 dishwasher connecting to SIEMENS-Dishwasher-xxxxyyyzzzz

I also do not see any meaningful MQTT messages and the controls and sensors in HA are unavailable.

[krusta4711]

Second problem is also solved. I changed the host name in the devices.json from _SIEMENS-Dishwasher-xxxxyyyzzzz_to the IP address of the dish washer. Not sure why host is not working. But using the IP address is fine for me (the address is reserved for the dishwasher in the DHCP server anyhow).

[Meatballs1]

The DNS is normally something related to the local suffix used in your network, there is an argument to try and force it, docker installs seem less likely to pick up the suffix presumably as it doesn't seem the DHCP option.

Ip address hardcoding seems the best solution