Cerbo GX unable to connect via MQTT

Node-RED
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1

Hi I’ve be trying to connect a raspberry pi running Node-Red to collect data from a Cerbo GX Firmware 3.75.
I get an immediate (tcp) failed: Connection refused.
When using nc.
From the Cerbo GX I get no Listen on port 1883.
netstat -tln
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 127.0.0.1:5900 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN
tcp 0 0 172.24.24.1:53 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:1881 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:8000 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:60989 0.0.0.0:* LISTEN
tcp 0 0 192.168.10.10:60335 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:81 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 0 172.24.24.1:54079 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
tcp 0 0 ::1:53 :::* LISTEN
tcp 0 0 :::443 :::* LISTEN
tcp 0 0 :::502 :::* LISTEN
tcp 0 0 :::8000 :::* LISTEN
tcp 0 0 :::22 :::* LISTEN
tcp 0 0 :::80 :::* LISTEN

I have been trying all sorts of things, but with no success.
How do I send a keep alive to port 1883 if its not listening.
I have set Local Network Security Profile to Unsecured with Superuser
Thanks for any help
Mark

2

Question may sound dumb, but did you enable the MQTT Access in the Integration settings at all?

3

Under services the MQTT is enabled.
I downgraded the firmware 3.73 and it started showing messages on mqtt explorer. WTF.

4

Correct. Firmware v3.74 and v3.75 had network bugs introduced. Rolling back to v3.73 was a smart move.