How to manage a ducted HAVC zoning

[south parrot]

I have ducted AC in my house that I want to control via HA
AC - Controlled via esphome
Dampers - Controlled via esp32+relays / esphome
Temperature probes in each room - esp32 / esphome

I can manually(via HA/Esphome) adjust the damper open/close and the AC airflow + setpoint. But I'm not sure how to go about hooking it all together.
So I'm looking for some recommendations on how I might do this
I am a software engineer so happy to slap down some code if that makes the most sense, but also I generally try avoid that if I can in HA.

Ideas so far:

• Make a program/service that interfaces to HA, taking sensors and setpoints as inputs then issuing commands to the various components as outputs.
• Maybe there's a blueprint somewhere that I haven't found yet
  ???
  Any ideas are welcome

[last barn]

so is the logic
if room xyz > open damper in room
if any damper is open then AC on
or is it more complicated than that?

if so you could use a thermostat helper to open the damper in room if temp above x
then have a binary sensor group of all the dampers. and if any of them are open turn AC on, if all closed turn AC off

[south parrot]

So the controls from the AC are:
mode: heating/cooling
AC-F: Fan speed: 1-4
AC-S: setpoint temp: ~10-30 degrees

Then each room will have:
R-S: Setpoint temp
R-C: Current temp
R-P: Presence in room

And ducts will have:
Open/closed - I Don't think I can do like 50% open with them

My first idea was thinking about it in a 1-1 configuration where you're use a PID formula to adjust AC-S to R-S and R-C - then adjust fan speed dpending how different R-S is from R-C

Buttttt maybe that is just overcomplicating things
Maybe you just set AC-S to the Average R-S +5 degrees, and regulate it based on the damper position instead, I think this is pretty much what you're saying

[rotund kraken]

How are you actuating the dampers?

This sounds similar https://github.com/nielsfaber/zoned-heating

[south parrot]

Yeah that does look similar, even if it's not quote right for me I can definately use it for inspiration

How are you actuating the dampers?
I have an esp32 running esphome connected to a 8 channel relay, each delay has 3 wires, open, close, common, of which all 3 are wired into an indivdual relay, NO, NC, COM

[rotund kraken]

So you have a real motorized duct installed already by a contractor? I think some of those have ha integration

[south parrot]

Yeah so I got them to install the motorised dampers, but they’re not smart, nor is the ac unit itself. It can only do 2 zones max and I think there’s a HA integration but it’s cloud based and very limited.
So I want to just throw away their controller, and control the dampers directly with HA.

[rotund kraken]

I was gonna say Micheal's suggestion is how a lot of these systems work, but you can set your AC setpoint which is interesting.

Kinda confused how that works because I'm used to it being more of a delta T thing when they set up a ducted system.