Omron NX102 PLC:Connection refused by Cloud Broker

Hi Guys,

I am currently trying to connect my Omron PLC to the HIVEMQ Cloud but I have some Authentication issue … with every login I got the message that I do not have the permission to connect to the Broker … what is strange:

If I use another Client like MQTT Explorer and NODE RED I am able to connect to the Cloud …

Could you please give me a cert and key in order to try to put those on the PLC to try … I am afraid that the PLC still needs a cert as well as a key …

Another note: The PLC does only support the MQTT Version 3.1.1 … I do not know which kind of version the cloud uses but I suppose the V3.1.1 should be fine I guess.

My cloud address is:

Evey kind of help is quite welcomed … I do not know what I should do more …

Best thanks,


Hi Andreas,

In case if your device requires a server CA file for TLS, you can download it from LetsEncrypt directly. Please refer to Frequently Asked Questions for instructions.

I hope it helps!
Kind regards,
Dasha from HiveMQ Team