EKHHE260CV37 unit support

[D1ang]

I have a Daikin domestic water heat pump (EKHHE260CV37) only for hot showers and was wondering if it is supported.
I've been looking for a X10 port but haven't found any (yet) But I do have some pictures of the board.

There is a diagram in the manual, but I'm not sure where to start.
So I was wondering if anyone here has the same unit and success conecting it?

[raomin]

It's unlikely that it behaves like an Altherma heat pump but you can try on this red port.

If not, connect it to a serial <-> USB and have a look with a serial terminal to see what's coming out.

[D1ang]

Thanx I'll try that asap. See what will happen, wish me luck :p

[assembly12]

Hi @D1ang ,
I'm in the process of buying a heatpump for domestic hot water and was baffled by the lack of smarthome/wifi support.
The Daikin model you mention is the only model which at least has a connector for a Wifi-module, but no further information as to what kind of module and the possibilities is available. This Daikin model is however now on the top of my favoured models.

Were you able to create a serial connection? If so, what does is look like?
I have some experience with reverse engineering modbus/serial connections and as long as there is communation on this port, i'm sure it will be possible to interpret at least some of it.

[D1ang]

Hi @assembly12,
No I hadn't tried it yet. Some other stuff came in between.
I'm not that experienced (yet) with reverse engineering modbus/serial connections.
But I'm still planning to try this out, not sure when.

[assembly12]

Hi @D1ang,
I've ordered the unit and it arrived yesterday. I'm not sure when I get around to installing it (probably in march/april), but will definitely have a go at making it smart. I will post my findings here or perhaps start a new thread on the HA forums.
Before that though, I will defenitely try if ESPALTHERMA is compatible. It's unlikely but not totally out of the question and worth a shot.

[KalaNagHTD]

[assembly12]

Thanks. Yeah I know that diagramm from the installation manual. It's basicly the only info you can find on the subject. Daikin doesn't even advertise the possibility that wifi might be added on CN22. I've written german and europe customer support a couple weeks ago, but didn't receive any answer.

[blablaaddi]

would love to get mine online as as well.

[hwinkel]

I have written them several times as well, about the WiFi Module. Never got any answer from DAIKIN. Where it is unlikely you get any support from such vendor.

BTW: I have writtten to Dimplex, Remeha, Wolf, Waterkotte, AIT (Nibe, Alpha Innnotec), Austria Email... ALL of them responded within days. and I receoed the infos about integration. Some have direct Modbus Support and even send all the Technical Material

[hwinkel]

but at least it seems to be a Serial Rx/Tx connection on CN22 (and CN21)

[nwd61]

I recently purchased the Daikin Altherma M HW 200 EKHHE200CV37 hot water heat pump.
I believe it has the same electronics as the EKHHE260CV37.
I am also looking for a way to read and possibly log the sensor data from it, and perhaps make some changes.
Have there been any developments or additional information from you on how to do this?

[assembly12]

I still intend to get this working. However up till now, my hot water heat pump isn't even installed yet.
I hope I'll get it done this year still.

[toastbroat13]

Hi all.

My Daikin Altherma EKHHE260CV37 is already running and I was also "surprised" that there is no official way to connect the "SG ready" and "WIFI" Daikin to the network... :-(

It would be very nice to find a solution to connect and control the heat pumb - in summer season to use solar power and in winter season to use cheap power via Tibber...

So I would love to hear any updates abot ESPAltherma and the Daikin EKHHE units.

Many thanks in advance and kind regards,
Matthias

[hwinkel]

Seems we are all in the same boat. The situation with the warm water heatpumps is the same across vendors. There are not well supported in terms of interfaces for control

[toastbroat13]

Doas anybody know, which DAIKIN WIFI or LAN Module would work? I tried to search and found several "informations" about possible module which might work but at DAIKIN I didn't found an official information.

The board includes the WIFI Card Connection (not included) at CN 22 - so it seems there should be some official adon to connect the wwhp to the local network...

[nwd61]

As you mentioned, Installation Manual says: "CN22 : WI-FI card connection (not supplied)"
Seems that there is no suitable DAIKIN-CARD. Maybe, that someone has luck with a blind shot with ESPAltherma?

[donwolle]

did anybody test the combination or do i have to be the first one?

[hwinkel]

As being in the threat, just want to inform you that I have decided to go with a heat pump with build in Modbus support.

[nwd61]

@donwolle: It would be great if you could do this test and analysis, e.g. with an Arduino, and share your values here. We may then be able to help you analyze the scanned values.