Watermeter and MQTT config

Hi,

i installed MQTT broker and did the MQTT configuration on HA and also on the ESP32. Now i am getting the requests in the mosquitto broker log, but no device is created:

2023-12-29 14:20:52: New connection from 192.168.177.23:64303 on port 1883.
2023-12-29 14:20:52: New client connected from 192.168.177.23:64303 as watermeter (p2, c1, k120, u’mosquitto’).
2023-12-29 14:22:06: New connection from 172.30.32.2:41518 on port 1883.
2023-12-29 14:22:06: Client closed its connection.
2023-12-29 14:24:06: New connection from 172.30.32.2:52064 on port 1883.
2023-12-29 14:24:06: Client closed its connection.
2023-12-29 14:26:06: New connection from 172.30.32.2:44618 on port 1883.
2023-12-29 14:26:06: Client closed its connection.
2023-12-29 14:28:06: New connection from 172.30.32.2:38406 on port 1883.
2023-12-29 14:28:06: Client closed its connection.
2023-12-29 14:30:06: New connection from 172.30.32.2:34700 on port 1883.
2023-12-29 14:30:06: Client closed its connection.
2023-12-29 14:32:06: New connection from 172.30.32.2:53598 on port 1883.
2023-12-29 14:32:06: Client closed its connection.
2023-12-29 14:34:06: New connection from 172.30.32.2:52606 on port 1883.
2023-12-29 14:34:06: Client closed its connection.
2023-12-29 14:36:06: New connection from 172.30.32.2:56434 on port 1883.
2023-12-29 14:36:06: Client closed its connection.
2023-12-29 14:37:55: Saving in-memory database to /data//mosquitto.db.
2023-12-29 14:38:06: New connection from 172.30.32.2:51796 on port 1883.
2023-12-29 14:38:06: Client closed its connection.
2023-12-29 14:38:36: Client 2sXtJ7dKOuBsFDrNsGHmVo closed its connection.
2023-12-29 14:38:47: New connection from 172.30.32.1:50433 on port 1883.
2023-12-29 14:38:47: New client connected from 172.30.32.1:50433 as 3hfSSxkcGi0UzRKI44KeW3 (p2, c1, k60, u’mosquitto’).
2023-12-29 14:40:06: New connection from 172.30.32.2:54856 on port 1883.
2023-12-29 14:40:06: Client closed its connection.
2023-12-29 14:42:06: New connection from 172.30.32.2:41502 on port 1883.
2023-12-29 14:42:06: Client closed its connection.
2023-12-29 14:44:06: New connection from 172.30.32.2:41214 on port 1883.
2023-12-29 14:44:06: Client closed its connection.
2023-12-29 14:46:06: New connection from 172.30.32.2:42234 on port 1883.
2023-12-29 14:46:06: Client closed its connection.
2023-12-29 14:48:06: New connection from 172.30.32.2:38410 on port 1883.
2023-12-29 14:48:06: Client closed its connection.

I am using HA in a vm, watermeter is 192.168.177.23. HA is available via 192.168.178.50. Firewall rules are implemented.
Has anyone a hint for me?

Thanks,
Ede