[Feature] Connect to multiple MQTT brokers/base topics

[GerSant]

Problem description

I have 2 zigbee2mqtt instances running, each use a different base topic

Suggested solution

Will be great the ability of declare more than one "mqtt" sentence in the platform

Alternative solutions

Have another Homebridge instance running the z2m plugin with the 2nd zigbee2mqtt base topic

Additional context / information

No response

[itavero]

Just out of curiosity, what's the reason for having multiple Zigbee2MQTT instances?

Would you be able to solve this with child bridges?

[GerSant]

There is a big problem with the Tuya ZY-M100-S accessories, those device spams the Zigbee Network with 10 status updates messages (with any changes) per second. This behaviour causes poor performance, response times, in the zigbee network affecting other devices. The current workaround is create a second Zigbee Networks (in other channel with other PAN ID) for this shitty devices.

You can found here https://github.com/Koenkk/zigbee2mqtt/issues/19045

The 2nd reason is, for some big networks (more than 150 devices) is recommended to split in 2 separate Zigbee Networks.

[itavero]

So, did the Child Bridge approach work for you? If so, let me know, then we can close this issue.