Control From MQTT

General
1

Afternoon All!

I'm trying to control a Air zone AC controller from my BMS system (JACE 8000 Niagara 4).

This is my setup:
Air Zone Controller connected to a PI5 (Running Home Assist)
Zigbee (Sonoff dongle).
HA is running Node Red.
RUT955 Modem (Acting as my MQTT Broker)
Niagara running control logic and graphics.

I currently have MQTT data being sent and received to and from the JACE8000 & PI5 (node red).

HA gives me a option via the "Trigger: state" to take data from the device and send it via MQTT to my BMS system. For example i can see if the AC unit is on or off.

Below is the "Trigger: state" block taking information from the switch and sending it to the JACE.

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Below is the status of the AC switch (RUNNING/OFF) being sent via MQTT to my jace.

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What I'm struggling with is to reverse that, so my BMS system will dictate weather the unit should be on or off.

How do i send the true/false being received from the JACE to the device to turn the unit on or off?

Hope there is enough information here for any help!

2

Hi and welcome to the forum.

(Just to let you know - though you may have been told.)

You are limited to how many posts you can do for the first day.

More importatntly?
I am NOT a HA person.

Doesn't that solve your question?
Or are you wanting a reply from the actual unit CONFIRMING it has received the command and turned on?

You are Publishing the message to office 1/AC/Switch
Put an MQTT IN node to that topic and it will receive/echo what is being sent to the AC unit.

OR....

Just wire the TRUE/FALSE State Convert node's output to where you want to See the state.

:person_shrugging:

3

Not sure if I understand the functions of the different components in your design, so I might be wrong below...

  1. Use a MQTT in node to listen what is coming out of the JACE. You'd have to configure the topic accordingly, I guess the documentation will tell you that. Out of that MQTT in node, you should get an on/off status.
  2. You plug a switch node on the output. Testing on/off will give you two outputs.
  3. Then, on each output, add an action node (from the same palette of the trigger). In there select the switch you want to act on, and call turn_on or turn_off depending on the action you want to do.

On the flow that you shared, I don't know exactly what the function node does... I suspect it can/should be replaced by a change node.

In node red, usually, the function node is the sledgehammer you take out when nothing else is sufficient.