Need Daikin Wifi? Use the Open-Source Faikin ESP32 Hardware instead of the official wifi Modules

Mr_Flibble · February 10, 2024, 5:23pm

Is it a physical connection issue or a data compatibility issue? If that is a S21 port, and as long as you can get the right pins connected, it should communicate.

You should be able to test with some JST RE Jumper wires - it will be ugly, but as long as you get the right ones lined up, I expect the system will boot and start communicating. Assuming Daikin keeps things consistent that is.

MassiPi · February 10, 2024, 7:52pm

did really favk mispelled home ASSISTANT in the gui? lol

Mr_Flibble · February 10, 2024, 8:08pm

You can always create a PR to fix it!

He has been adding a lot of great features, I can forgive typos.

MassiPi · February 10, 2024, 8:28pm

i’m not a faikin customer, but i know he is always present and very kind, so i was surprised by that

vercellino · February 11, 2024, 6:01pm

I’ve connected an esp32 with level shifting to my Daikin AC S21 port and used the esphome-daikin-s21 custom component.
It works like a charm, but it was just a prototype.

Now I’m waiting for a custom pcb with some improvements, like I2C standard port for addon sensors and infrared sending/receiveing option.
Onboard user led.
Standard TTL programming port to put Esphome or whatever on it.

It can be connected directly to the S21 port and it will handle power supply and bidirectional level shifting.
We can say is a Faikin on steroids.

As makers know the minimum batch for chinese pcb makers is 5; I will just need one of them, if somebody located in Italy is interested just let me know.
I can also supply some prewired connector to make life easier.

Best regards

hargathor · February 17, 2024, 11:30pm

Sorry I should have been more clear. Physical issue. It just doesn’t fit.

Mr_Flibble · February 19, 2024, 9:49am

Try grabbing a few female to female jumper wire test leads, those should work. In fact, it is what I used to do my first test with. They won’t be the “appropriate” connectors, but what really matters is that you have connectivity.

In your case, you are going to need one kind of connector on one side, and a different one on the other, what matters is that the right leads connect to the right points. A bundle of them looks like this:

You can break them apart into single wires, that should do the trick.

hargathor · February 19, 2024, 8:50pm

Thanks I tried that but it seems that the pin width is not 2.5mm like these standard Dupont like jumper cable. I can squeeze two over the five needed (four actually since one is not used) but not more.

But you are right this will be my next approach as soon as I have some time. Plug directly the leads without the plastic connector just to validate the integration. I’ll keep the forum informed.

I’m surprised that no one has commented that have bought an s21 cable and is able to share a picture or in the best case scenario a connector reference. No way it is proprietary.

Thank you for following me and advise me in my journey though

BenAndo · February 20, 2024, 2:01am

Making or getting a S21 cable has been discussed here: Where to find cable information (S21) · revk/ESP32-Faikin · Discussion #81 · GitHub

vercellino · February 20, 2024, 3:56pm

https://it.aliexpress.com/item/1005005562174022.html?spm=a2g0o.order_list.order_list_main.16.7150369602iIra&gatewayAdapt=glo2ita

This is the one that will fit in the S21 port.
Of course the 5 pins model.

hargathor · March 24, 2024, 11:01pm

Thank you so much. I have ordered, received and tested this connector and it works well soft far with a CTXA15AW. I will test it more deeply in the next few weeks but the first trial seemed promising and in line with what faikin deliver and what Daikin cannot.

I will update the issue and GitHub repo of faikin with the connector’s id and split version to disclose that this split’s model works well with faikin.

Thanks faikin

asic79 · April 4, 2024, 3:28pm

Hi @hargathor

Was the connector from vercellino’s post please (the one from Aliexpress)?
I’m struggling as well finding one for the new S21 port…

Many thanks

ChielB · April 17, 2024, 3:24pm

Great write-up! I am looking for the STL (or STEP) files for the 3D printed case, but can’t seem to find them. Could you point me in the right direction?

Mr_Flibble · April 17, 2024, 3:36pm

They are up on a folder on Github - I think it was PCBCase - the repo has been updated a little. I had to dig through the folders to find the files.

This link is close:

github.com

revk/PCBCase/blob/e54f32c17b8684c50ac0aeb99a67f1e5fb899745/models/README.md

# Models

The `models` directory contains models for the parts. These are OpenSCAD code to draw the part. This does not have to be pretty, and will often be a simple cuboid. It is used to create a cavity in the case, and any necessary holes, etc.

## Filename

For each part a file name is found for the necessary OpenSCAD code. This is done by checking a number of possible filenames until one if found.

- If there is an `LCSC Part #`, then this is checked. e.g. `C265103`
- The footprint is checked exactly, without prefix, e.g. `RevK:JST_EH_S5B-EH_1x05_P2.50mm_Horizontal` will check for `JST_EH_S5B-EH_1x05_P2.50mm_Horizontal`
- If neither of those matched, then the name of each 3D model is processed (all of them, not just the first) isong the filename without directory or suffix, e.g. `${KICAD6_3DMODEL_DIR}/Connector_JST.3dshapes/JST_EH_S5B-EH_1x05_P2.50mm_Horizontal.wrl` would check `JST_EH_S5B-EH_1x05_P2.50mm_Horizontal`.

In any case, when checking a filename (apart from the LCSC Part), any numbers in the filename are replaced with `ℕ`, e.g. for `JST_EH_S5B-EH_1x05_P2.50mm_Horizontal` the filenames checked are as follows, matching the first one found.

- `JST_EH_SℕB-EH_1x05_P2.50mm_Horizontal`
- `JST_EH_S5B-EH_ℕx05_P2.50mm_Horizontal`
- `JST_EH_S5B-EH_1xℕ_P2.50mm_Horizontal`
- `JST_EH_S5B-EH_1x05_Pℕmm_Horizontal`
- `JST_EH_S5B-EH_1x05_P2.50mm_Horizontal`

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ChielB · April 17, 2024, 3:51pm

Got it, found it here: ESP32-Faikin/PCB/Faikin at main · revk/ESP32-Faikin · GitHub. Thanks!

DragonQ · April 23, 2024, 7:46pm

I’ve gotten fed up with the ONECTA app/API going down a couple of times this year already, screwing with our automations, so I’ve finally gotten round to buying a Faikin and cheap cable for our Perfera!

Just need to find some time to turn off the isolator, take it apart, and install the thing I guess. It’s a shame it needs internet access for updates (providing files that can be uploaded via the GUI would be better, since no air con controllers should ever be connected to the internet IMO). I will likely update it once it’s first connected then move it to my VLAN with no internet access.

One thing I will miss is the ability to set temperature in 0.5 °C increments though. Shame the local Dakin API never supported that (even though the handheld controllers do)!