hi all
i am currently reviewing which heat pump to install in my house
its absolutely critical for me to have local control via HA so i can interface with the octopus API and my solar and batteries ect.
specifically im looking at what they call hydronic or air to water heat pumps. im not looking at air to air or aircon as we call it.
if anyone knows any brands with HA plugins please share!
im trying to build a list\1
Hi,
My ASHP gets installed next month, and after a lot of searching, simply, I’m not sure.
The Octopus Cosy units looked to be cloud API only, so I went for a Daikin Altherma on the basis that “most” have a serial port, and some have options for a expensive and possibly crap local WLAN module.
My plan is to try a Fakin ESP32 module on the serial port and see if the Daikin aircon protocol is similar to the Altherma.
Will it work? Ask me in a month… 
Solar and battery storage inverters seem even worse, with even Platinum quality integrations needing manufacturer “permission” to connect (EnPhase needs an API key, Fox ESS have some reports of poor support, GivEnergy seem to be TCP Modbus).
Worst case, my hope is the Octopus API might be a last cloud resort for ASHP+PV+batt+EVSE.
It looks like UK HMG may be changing the MCS grant conditions to allow air-to-air heat pumps, opening the door to heating and cooling - something that would have been useful but not ÂŁ7500 useful!
This forum has a lot of good searchable information, but manufactures seem too trigger-happy in updating firmware to lock owners out of their own hardware and changing APIs, so the situation changes. No, I don’t like it either. 
If this helps, 
this post!
I had a Daikin ASHP (EDLA11D3V3 with BRP069A78 WiFi module) installed by Octopus just over a week ago.
I’ve followed the instructions in the HACS Daikin Onecta integration, but no joy.
(I know - it’s a cloud connection, with limited info, but anything would be better than the Onecta app)
When I sign in to the Daikin Developer Portal, it doesn’t show any products, so I can’t get OAuth credentials to complete the connection.
Unfortunately, Daikin Support were not helpful:
“Please note that the Daikin Developers portal is exclusively available to developers. If you are an end-user, you will not have access to this portal. End-users are provided access to Onecta and Stand By Me only.”
Hey-ho. I’ll have to wait for my Shelly Pro EM 50 and P1P2MQTT bridge to arrive.
The new Daikin Altherma 4 has a Rj45 port for Modbus TCP/IP connections without additional hardware. Documents (Registers) as “MMI Reference Guide” in different languages available.
Hi,
Darn - I had an Altherma 3 installed yesterday (EDLA08E2V3) and there’s no sign of an RJ45 on the pump external unit.
There are three JST-EH connectors that are candidates for a serial control port which might work with a Fakin module (newly renamed to Faikout) but I’m still patching around yet replacement radiator pipe holes and haven’t had time to try probing the board.
EDIT: After a look at install photos, the Altherma 3 main PCB does have the blue 5-pin JSH-EH connector labelled X10A, suggesting ESPAltherma may work for monitoring, but not control.
Octopus installed both a Madoka room thermostat and a User Interface with TWO WLAN modules BRP069A78 (one spare). These look a lot like SD cards, and slot into the UI to give control via the Onecta app (OK, not great) and Octopus (app is very slow, but more useful for Intelligent tariffs so Kraken can turn the ASHP on and off).
Searching for the WLAN module brought up the obsolete HA Integration for Daikin Altherma 3 Heat Pump and the replacement Daikin Onecta Integration for a new Daikin API. This looked good, until I tried the Developer Portal to create an API key - and ended in a dead end (No Products listed). 
I will report back my findings with an Octy Altherma v3, but back to patching the holes…
(BTW frenck has a new home, which seems to include an Altherma ASHP, 3x other non-Daikin mini-split aircons, and loads of semi-random control kit without manuals.)
A properly setup ASHP on weather compensation has almost nothing to control. I have a Vaillant 7kW Aerotherm, and other than adjusting the heat curve when I upgraded the bedroom window and insulation, it’s not something that needs any human input. What I do have is a CT clamp on the ASHP power line connected via my myenergi Eddi to monitor it.
Search for an HP that supports Modbus, either serial or TCP and has a public register map.
That’s the simplest way.
I own an Ariston but to get the data you need an adapted to tap in the proprietary bus.
Hi,
You need to use the Onecta app to register your Altherma ASHP with your details and give permissions for remote access for your device to appear in the developer portal.
I tried the developer portal and found the same No Products, but the Onecta app has a Service section which allows you to register the devices, link you email / address, Octy as the installer, and allow remote monitoring. After that, you also register for a free 5-year warranty from Daikin.
Did the Octopus install lead explain this? Nope!
Now when I go into the same developer portal, I see a change…:
ONECTA Cloud API
The ONECTA Cloud API enables you to control your Daikin devices.
This video helped, but also didn’t explain the Daikin Onecta registration step to avoid No Products in the dev portal:
I now have Client ID and Client Secret for the API keys.
If this helps, this post!
