MQTT / Home Assistant - Illegal discovery topic ESP32-Cam Watermeter

[iridium2001]

The Problem

I find constantly these messages (below) in my home assistant log.
Running 15.3 updated via ota from 15.1.
In the AI-on-the-edge UI I configured wifi hostname and mqtt main topic both to "watermeter".
MQTT seems to use the correct messages to HA also (so it works generally), but I don't find, why still these messages seem to be send on top. Seems there is a default main topic somewhere/somehow stored.
AI-on-the-edge logs state that is only sends mqtt messages like: "Published topic: watermeter/main/rate_per_time_unit".
Reconfigured MQTT in both Ai-on-the-edge and HA already several times, but problem stays the same.
I noted that aside of the mysterious main topic, the mqtt messages all end with "/config".
Technically, HA seems to complain about the space character in the main topic, but the question is, where are these messages coming from?

Version

15.3

Logfile

Logger: homeassistant.components.mqtt.discovery
Source: components/mqtt/discovery.py:154
Integration: MQTT (documentation, issues)
First occurred: 09:44:28 (17 occurrences)
Last logged: 09:44:29

Received message on illegal discovery topic 'homeassistant/sensor/ESP32-Cam Watermeter/rate_per_time_unit/config'. The topic contains not allowed characters. For more information see https://www.home-assistant.io/integrations/mqtt/#discovery-topic
Received message on illegal discovery topic 'homeassistant/sensor/ESP32-Cam Watermeter/rate_per_digitalization_round/config'. The topic contains not allowed characters. For more information see https://www.home-assistant.io/integrations/mqtt/#discovery-topic
Received message on illegal discovery topic 'homeassistant/sensor/ESP32-Cam Watermeter/timestamp/config'. The topic contains not allowed characters. For more information see https://www.home-assistant.io/integrations/mqtt/#discovery-topic
Received message on illegal discovery topic 'homeassistant/sensor/ESP32-Cam Watermeter/json/config'. The topic contains not allowed characters. For more information see https://www.home-assistant.io/integrations/mqtt/#discovery-topic
Received message on illegal discovery topic 'homeassistant/binary_sensor/ESP32-Cam Watermeter/problem/config'. The topic contains not allowed characters. For more information see https://www.home-assistant.io/integrations/mqtt/#discovery-topic




[0d00h26m08s] 2023-12-19T09:49:35 <DBG> [CNN] getReadout#PointerEvalHybridNew()= 5
[0d00h26m08s] 2023-12-19T09:49:35 <DBG> [CNN] getReadout#result= 590
[0d00h26m08s] 2023-12-19T09:49:35 <DBG> [POSTPROC] handleAllowNegativeRate for device: main
[0d00h26m08s] 2023-12-19T09:49:35 <DBG> [POSTPROC] Neg: value=590.281000, preValue=590.282000, preToll=590.280000
[0d00h26m08s] 2023-12-19T09:49:35 <INF> [POSTPROC] main: Raw: 590.281, Value: 590.282, Status: no error
[0d00h26m08s] 2023-12-19T09:49:35 <DBG> [FLOWCTRL] Status: Sending MQTT (09:49:35)
[0d00h26m08s] 2023-12-19T09:49:35 <DBG> [MQTT IF] Published topic: watermeter/status, content: Sending MQTT (msg_id=117)
[0d00h26m08s] 2023-12-19T09:49:35 <DBG> [MQTT SERVER] Publishing System MQTT topics...
[0d00h26m08s] 2023-12-19T09:49:35 <DBG> [MQTT IF] Published topic: watermeter/connection, content: connected (msg_id=118)
[0d00h26m08s] 2023-12-19T09:49:35 <DBG> [MQTT IF] Published topic: watermeter/uptime, content: 1568 (msg_id=119)
[0d00h26m08s] 2023-12-19T09:49:35 <DBG> [MQTT IF] Published topic: watermeter/freeMem, content: 820355 (msg_id=120)
[0d00h26m08s] 2023-12-19T09:49:35 <DBG> [MQTT IF] Published topic: watermeter/wifiRSSI, content: -50 (msg_id=121)
[0d00h26m08s] 2023-12-19T09:49:35 <DBG> [MQTT IF] Published topic: watermeter/CPUtemp, content: 52 (msg_id=122)
[0d00h26m08s] 2023-12-19T09:49:35 <DBG> [MQTT SERVER] Successfully published all System MQTT topics
[0d00h26m08s] 2023-12-19T09:49:35 <DBG> [MQTT SERVER] Int. Heap Usage before publishing System Topics: 89139, after: 89059, delta: 80, lowest free: 77627

Expected Behavior

No warnings / errors in Home Assistant.
Only the correct mqtt messages should be send.

Screenshots

No response

Additional Context

No response

[Slider0007]

Received message on illegal discovery topic 'homeassistant/sensor/ESP32-Cam Watermeter/rate_per_

I assume it's related to the space in device name ESP32-Cam Watermeter. Rename your device and use a name without any spaces.

[iridium2001]

thanks for your reply, @Slider0007!

As mentioned, the hostname is already set to "watermeter" and the mqtt main topic as well. Or is there any other place where I could change the device name?

Of note, the messages home assistant is complaining about, seem not to be the messages that ai-on-the-edge is sending during the normal operation. But I find them after every restart of home assistant and/or ai-on-the-edge.

[iridium2001]

Finally had the idea that the behaviour could be caused by mosqitto rather than by ai-on-the-edge. And actually this was the case:
https://github.com/sleevezipper/hass-workstation-service/issues/96#issue-952135346