Some information about the CN_WIR connector you will find HERE and more comprehensive HERE.
Anyway it might be labeled differently depending on your ac model. If it uses the AWM01A01/ AWM61A01 wifi adapter, then itās definitely cn_wir
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Iāve got boards and various types of cable up for grabs here:
eBay
Hi all, I have a Daikin internal unit FBA71A(9) (EU product) and Iād like to connect to it a faikin board but I donāt know what cable I have to purchase. I send you pic of the FBA71Aās board.Iām from Italy.
TIA, my best
I canāt see all your labels, but I can see a X50A so at first pass, I would hazard a guess that you go with that.
There are both the X50A and the X35A plug on the boardā¦
ā¦Also is there a 3D printed case box for the faikin board available online?!?
ā¦Also is there a 3D printed case box for the faikin board available online?!?
Yes! I donāt remember exactly where it is - if you go through the github links for the project you will find it. I donāt own a 3D printer yet, but was able to get them printed by a service. I may have posted links at the very top of this - I canāt recall.
Found it, its in the Github repo:
I simply use 18mm (if Faikin is cut to its smallest possible size) transparent heatshrink tubes for it because all Faikins here are put inside the ACās covers anyway, thus not visible from the outside. Heatshrink tubes are cheap, easy to get and protect the Faikins well enough against short circuits and excessive moisture.
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For X50A you need power from X35A as well.
Check HERE if you prefer to use a ready made cable.
As for the sockets on your PCB you might need a Type C cable. But note there are two types of X50A sockets on Daikin AC PCBs! Just send a picture of the PCB of your Daikin AC to Andrew and he will tell you which exact cable type you need.
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Are there any USA retailers of the Faikin yet?
How difficult would it be to get some made here? Trying to get a few for less than $29 + 6 or 7 dollars for the connector + $14 in shipping for a total of about 49 or 50 dollars each.
Is anyone in the US down for a potential group buy?
Ivan, iām from Italy aswell. I would love to try your solution, can we talk privately? I canāt seem to be able to send you a private message on this forum.
Hi
HASS running on Pi4.
I have some 5 faikin converted units (had to build the boards myself, nice).
There is some strange behavior for a couple of months now, I just cant find out why. No logs at all, but itās like some time to time devices get a reset or so. All faikin A/cs just beep, on almost every full hour (yes, not all the full hours, but most of them, and when it beeps, its a full hour). Even if they are off. As if they received a command to repeat the state they are in. They beep with just a very little delay between them, in sequence. All off, then beep all, still off.
It all seems as if home assistant recycled itself, but I find nothing in mosquitto or HASS logs.
Anyone? 
What specific boards are you using?
Maybe those boards are not compatible? It doesnāt seem like a HA problem after all.
I would bring this up either at the Issue Reports or at Discussions with the GitHub page of the developer.
Iāve got Faikins w/paired BLE temp sensors on all of my split systems.
For the time being, most of my household uses the stock Daikin IR remotes to change the temperature target on a unit. Iād like to reference the external BLE sensors, over the rubbish internal Daikin readings, for greater accuracy.
Does anyone know the settings to make this possible?
Iāve messed around with Faikin-auto mode, but changing the temp on the remote has no impact on the faikin auto target temp.
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There was a Faikin firmware update on 5/5/25 to implement a new parameter
- Added
nohourlyto disable hourly S21 poll (apparently some units beep!)
Refer this page:
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Ciao! Iām from Italy as well ā¦ please PM me in private. Thanks
Hi, I have spent the weekend trying to connect my āsmartenā my Daikin air con units with Faikin-ESP8266 with no luck, and was hoping someone could point out an obvious mistake I might be making.
The units are inside split system room units from Australian supplier. The models are FTXS71KAVMA and FTXS35KAVMA - essentially the same model just different sizes. They are not listed on the Faikin compatibility list, but they both have S21 ports I was hoping this was just because no-one had tried wit them.
I flashed an ESP8266MOD (CP2102) with the Faikin-ESP8266 file - no problem. I used the labelled TX and RX pins for data, and the Vin for power. When I connected the boards to the Daikin units I was able to boot into and configure the Faikin interface. I connected to Home Assistant via MQTT no problem as well. But, the interface says āSystem not connectedā for the actual AC connection.
Iāve tried the following troubleshooting:
- A different ESP8266 board (same model) - no change
- Reversing the TX/RX connectors (physically and via the interface) - no change
- Powering the board via the S21 5V and the S21 12-14V (using a buck converter) - no change.
Should the ESP8266 alone be enough to connect to the system or am I missing some vital piece? Iāve seen some people using some type of interface board with the ESP8266 (logic level converter?) - do I need this?
How common is it for some Daikin units to just not work?
Any insights would be greatly appreciated.
Cheers, Rich
Is it actually a Faikin device or just a plain old ESP8266?
The Faikin is an ESP8266 with extra hardware to do voltage conversion and regulation - you cannot direct-connect a standard ESP8266 to a Daikin as it does not out put enough voltage on the 5v pin.
Thanks very much for the reply.
No it is not an actual Faikin - just a ānormalā NodeMCU ESP8266.
That would explain my problem. Would a logic level converter (powered on the 5V side by the Daikin AC 5V line) be enough to overcome lack of power?