How I send data to the different broker in MQTT without certificate

ChirpStack (v4) Setup and configuration
1

Hi,

Here show my architecture in below image.
Chirpstack

So I need to change MQTT broker and Topic so How I can change and what is the method to send data to the other topic?

2

There are a few issues with your question that make it confusing:

1.) Generated certificates are in no way required to operate MQTT. You can use it without TLS (i.e. internal metwprl) or via public CA-based certs (internet).

2.) How are your gateways conneting to ChirpStack? I think you’re missing something in-between.

3.) Have you looked at the ChirpStack configuration for integrations? It will allow you to change topics. Otherwise, I’m not sure I understand your question.