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Grant Aerona3 - Home Assistant control via Modbus

 
Air Source Heat Pumps (ASHPs)
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 Grantmethestrength
(@grantmethestrength)
Estimable Member Member
Joined: 3 months ago
Posts: 40
Topic starter 28/03/2025 2:46 pm  

Good afternoon all,

    I have finally got around to documenting my journey in getting around the woeful controls that the destroyers installers installed when they put in my ASHP. I have used a Waveshare POE ethernet to modbus converter and now have full remote control of my ASHP. The next stage of my project is to build a self hosted AI agent probably using Mistral, N8N and MCP in order to create my own version of a Homely type controller.

If this floats your boat then I commit to thee: https://github.com/Si-GCG/Grant-Aerona3-modbus/tree/main

If you want to join in the fun let me know and I will happily share everything with you as I continue this journey.

Kind Regards

Si

Kind Regards
Si
——————————————————————————
Grant Aerona3 13kW
13 x 435w Solar Panels
Solax 3.5kW Hybrid Inverter


   
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Grant Aerona3 ECO4
 Uk_pete_2000
(@uk_pete_2000)
Estimable Member Member
Joined: 5 months ago
Posts: 73
29/03/2025 8:07 pm  

Count me in @grantmethestrength

I have a Grant R32 13kw HP. So not the same model, but might be able to help.

Now heating season has finished, I am in the process of installing a 

RS232/485 To WiFi/Ethernet Module (Modbus/MQTT Gateway)

From PI hut. 

I am also looking at making changes to my buffer / pipe work and installing various flow meters and Emoncms energy meters into the mix.

Just starting out on the HA journey on a PI-4 for testing and a small PC for live workings

Pete

 


   
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 Grantmethestrength
(@grantmethestrength)
Estimable Member Member
Joined: 3 months ago
Posts: 40
Topic starter 29/03/2025 8:28 pm  

Hi Pete,

    I am also looking into getting more sensors as it is bonkers that they don't even install a tank thermometer! I have seen some active discussions on the openenergymonitor forums about AI integrations. I have just got ollama in a docker container and am trying to pull Mistral small 3.1 as I type (top Saturday night!).

I have recently watched

and am going to attempt to get this up and running when I get a chance, I think with various agents we should be able to better analyse the data and then make changes.

Regards Si

Kind Regards
Si
——————————————————————————
Grant Aerona3 13kW
13 x 435w Solar Panels
Solax 3.5kW Hybrid Inverter


   
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 Grantmethestrength
(@grantmethestrength)
Estimable Member Member
Joined: 3 months ago
Posts: 40
Topic starter 29/03/2025 8:43 pm  

Not sure if that link is working but it is a video on Cole Medin's channel called

The MCP Integration EVERYONE is Sleeping On (MCP + Custom AI Agents)

Kind Regards
Si
——————————————————————————
Grant Aerona3 13kW
13 x 435w Solar Panels
Solax 3.5kW Hybrid Inverter


   
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 Uk_pete_2000
(@uk_pete_2000)
Estimable Member Member
Joined: 5 months ago
Posts: 73
29/03/2025 10:31 pm  

Yes link works. Starting to work though it, but looks like I need to go back a couple of steps first to understand more


   
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 Uk_pete_2000
(@uk_pete_2000)
Estimable Member Member
Joined: 5 months ago
Posts: 73
03/04/2025 4:56 pm  

Hi,

Had a look over the information / video and though I can just about follow it and may be able to take a stab at it, I think its a little too much to use AI to deal with automating a HP when a good algorithm / table will do the job and be much simpler to implement.

I notice from Github, that you updates the Chofu one and got a lot more information out of the HP.

Looking at you screen shot, it seems you are able to control the WC, flow temp and stop / start the HP. Which are all the controls you need.

An algorithm should then be able to work out the best options with updates to a table to pass on information between sessions.


   
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 Grantmethestrength
(@grantmethestrength)
Estimable Member Member
Joined: 3 months ago
Posts: 40
Topic starter 03/04/2025 5:07 pm  

This is true, but I about learning about agentic AI and I want to test it out on something lol. 

Kind Regards
Si
——————————————————————————
Grant Aerona3 13kW
13 x 435w Solar Panels
Solax 3.5kW Hybrid Inverter


   
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