I was kind of looking for a neater all in one solution
It's an attractive idea but I fear neat all-in-one solutions and detailed and layered levels of control don't always happen together! If you haven't tried it already, don't be afraid to write your own python code (rather than use HA which is python, but rather complicated python) as it is not difficult, particularly if you are already familiar with python, which I suspect you are, perhaps to quite a high level. The key module/package you need to make the connection is minimalmodbus, which is tolerably well documented. All this can be done without the HA complexity overload.
Midea 14kW (for now...) ASHP heating both building and DHW
@cathoderay i will have to take a look at that, tbh as I am already deep into the home assistant (regrown virginity) ecosphere it is just as easy for me to use it. My Grant Aerona3 home assistant integration is python based, but I am very much an AI powered vibe coder!
Kind Regards
Si
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Grant Aerona3 13kW
13 x 435w Solar Panels
Solax 3.5kW Hybrid Inverter
@grantmethestrength if you already have Home Assistant, just buy the Svenar dongle. It will take you 5 minutes to set up and you will have everything controllable through HA. It gives you 259 entities (data points) of which some 70 controllable.
@grantmethestrength if you already have Home Assistant, just buy the Svenar dongle. It will take you 5 minutes to set up and you will have everything controllable through HA. It gives you 259 entities (data points) of which some 70 controllable.
An extract:
Ours arrived a couple of days ago as it happens and plan to get it up and running tomorrow am.
@mphb I have built a custom integration that exposes 245 entities on my Grant Aerona3 I currently use the Waveshare modbus to eth POE Module B to control the ASHP modbus registers and a couple of shelly minis to control dry contact switches on the PCB of the ASHP. I was just hoping that the new waveshare device would give me an all in one solution with 8 switches built in. I have just got a different device, the waveshare POE modbus 8 channel relay up and running so I will swap out that for the shelly's and use it with the original modbus controller.
Kind Regards
Si
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Grant Aerona3 13kW
13 x 435w Solar Panels
Solax 3.5kW Hybrid Inverter
The issue with the Grant is that you have to wire directly into the PCB on the ASHP both for the modbus connection and the dry contact switches so I have run two ethernet cables to it as well as another power cable (in the vain hope that I can figure out how to control the diverter valve). This will give me control of night mode, low tariff mode, dual set point Heating/DHW via Home Assistant.
