Documentation on ccu-mqtt

[JMyrng]

Hi there,

thanks for maintaining this awesome software.

My hole smarthome is based on MQTT and I'd like to talk to the CCU3 with MQTT too.
Getting variables out works like a charm with the "ccu-mqtt" but I can't find a documentation on this input sceme. Where can I find the proper topics for setting some params in the CCU3?

Setup: NodeRed in Docker on Synology NAS, CCU3 for floor heating

Best regards,
Myrng

[ptweety]

My hole smarthome is based on MQTT and I'd like to talk to the CCU3 with MQTT too.

In this case I would strongly recommend the CCU-Jack as an add-on for your CCU

[JMyrng]

There are two things that bother me about this solution:

1. I would like to run the CCU without additional software.
2. CCU-Jack creates its own MQTT server, but I would like to use it with an existing server.

Where can I find information about this topic sceme:
hm/set/${channelNameOrAddress}/${datapoint}
Is it copied from CCU-Jack?

[ptweety]

1. I would like to run the CCU without additional software.

Fair enough. As you can setup Node-RED within it's own docker container on your NAS the same applies to CCU-Jack.

2. CCU-Jack creates its own MQTT server, but I would like to use it with an existing server.

As far as I know CCU-Jack can also act as a MQTT-Bridge.

Where can I find information about this topic sceme: hm/set/${channelNameOrAddress}/${datapoint} Is it copied from CCU-Jack?

No, it's not from CCU-Jack. I think it was made up by the original author of this node years ago ... See here

[JMyrng]

Thank you for your quick answers.

I've got it working on my side with the ccu-mqtt node.

In case anyone is ever looking for a similar solution:
To set the heating profile on a WTH-2 thermostat via ccu-mqtt node:

1. ccu-mqtt node settings for setValue hm/set/${channelNameOrAddress}/${datapoint}
   where channelNameOrAddress is the serial number with the according channel, e.g. 000A9D8XXXXX41:1
   and datapoint is ACTIVE_PROFILE
   The name of the datapoint can be sourced in the outgoing mqtt messages of the device
2. set up a mqtt-in node in front of the ccu-mqtt node with the topic hm/set/#
3. just send the new profile number to the topic hm/set/000A9D8XXXXX41:1/ACTIVE_PROFILE

In my opinion, this is about as easy as it gets. Thank you again for this awesome module @ptweety!