Great job! 
A few weeks ago iāve also contacted support with basically the same questions. Sadly they didnāt respond yetā¦ But nice to know that the Belgium Daikin dep. is putting through the local API requests etc.!
What mail-address did you contact?
Can you give me the emailadres? Iām also going to mail. Fellow Belgian who also just installed these daikins.
Hi Stef,
That would be [email protected].
Did you try the retrofit? You can find second-hand B-series on ebay or buy them new.
Hey, I have the FTXM-R versions. It seems that those canāt fit in these B modules.
Iāll check this later, but I donāt really want to buy 3 wifi controllers to control it again. Iāll see how it goes, and Iāll email Daikin to put some more pressure on it (if it even helps haha)
You say ācontrol it againā.
Did you lose the ability to control them using the API by firmware upgrade?
No, I said it wrong. I want to control it with HA like the old ones. I decided to buy Daikins because of the integration. My order actually said the older version with the B wifi, but I got the newer ones with out extra cost (also two 2,5 kw instead of two 2 kw units :D)
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I guess that HA and Nabu Casa could be such a company. I could try to write the integration if we get the Nabu-Casa team onboard with an NDA (see this Config Flow | Home Assistant Developer Docs and send an email to [email protected].).
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Hi Frederik, I just emailed hello@HA to see what is possible.
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I already got feedback from Paulus (translated from Dutch):
Daikin had already told me this in May. Pity.
An NDA is unfortunately not possible for us because our code is open source and therefore implementing a secret API is not possible.
So unless we can put more pressure on Daikin (open cloud API or local API), this marks the end of the integration for all new devices.
Wow, so the API is secret, not the keys!? That is really not what I expected in 2021 (perhaps in -96 or so).
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Funny how we went from one of the most open, local and simple implementations to this pile of crap overnight. This is even worse then the IO standard from Somfy/Velux as there you can at least buy an intermediary (Tahoma box) with an open API. Probably we can have some 400ā¬ Niko box in the future to go from the Niko cloud to the Daikin cloudā¦
Also the fact that there is no sign of anything HomeKit related is almost laughable. Their product is not going to be very ācoolā.
Remember when Logitech changed some things with Harmony and all the negative feedback that generated for them? This is beyond that. And Iām not so certain they are not going to bring this to the older models too a few years down the line.
Now, Iāve already seen scripts that allow support for these C models by reverse engineering the Android app which is probably using the exact same APIā¦
Does Daikin have an alternative way to control these domestic units (wired?) that could be used.
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Perhaps we could listen for the communication and communicate with the API, but that will always be a ānon supportedā way unless Daikin allows it.
https://medium.com/testvagrant/intercept-ios-android-network-calls-using-mitmproxy-4d3c94831f62
Anyone looked into this: GitHub - Apollon77/daikin-controller-cloud: Connect and Control Daikin Cloud devices
Found it by accident
Yes, there is an S21 connector on almost all units.
Using the right cable, you can plug in an āolderā B or A external wifi controller.
Iām aware, think it was already featured here as well. This is currently my plan B. Was wondering more about some āindustrialā control method which probably uses that same port then.
Plan D is me signing their NDA and flash some binary version of their API on a microcontroller and sell it for 50ā¬ 
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I found this website https://compatibility.intesis.com/ where I searched for my FTXM-R indoor units. The result is several compatible devices for Daikin units. Iām considering to buy one for IR although I hate the idea that every change the system will make creates a beep on the unit. Wiring the units for KNX is another option but then I will have a cable running along the wall (not very nice either). Thereās also a Wifi module that is wired to the unit. Maybe thatās the best way. It is expensive. Found one for 239 Euros here. Would be a big loss if it doesnāt work. You have to communicate with ASCII commands with the Wifi unit.
Ok, I just ordered the Intesis Wifi module here for 238,37 Euros. Iāll let you all know how things went. If it works Iāll order a second one for the unit in my bedroom. Iām not using Home Assistant for this project. I think I can use the building blocks of my Loxone system for that. But if it works with Loxone my guess is one of you can code it for Home Assistant as well
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