you do not need to pull out the pcb
you just need to take out the cover, then there is easily a metal cover (just pressure) and under that you can see the board.
Then it’s just about looking for an empty S21 socket 
very very easy
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Thanks, just saw a video of someone installing AWM61A01 dongle and he just took off the entire enclosure and the port is visible on the side.
My model comes with built in wifi apparently so I’ll need to check where it’s hooked up to. Hopefully it’s s21, i’m seeing a few other ports discussed in the github
Hi, i’ve opened it up.
Looking at the diagram, the wifi dongle needs to connected CN_WIR port
What do you think?
It sure looks like it - but I am not familiar with this model at all. Seems to have more pins than the S21 port. So, it seems reasonable to me. You would need to know the pinouts too.
Looks like you might be the first to try this though - I can’t find any other references to other people using this port. I would guess the protocols are the same as it would be expensive to change them up.
I’ve added discussion here
Looks like even the awm61a01 wifi dongle is only using 4 cables/pin
Ok, so I just browsed esp8266-faikin and
FTXB50C - CN_WIRED protocol is listed there so I assume this should work with the right pinout.
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Hi @Mr_Flibble can faikin display additional details like below?
I was asking around and this is using the daikin integration with BRP072C42 wifi module
Thanks, didn’t see any mention of other sensors other than ble on the github.
No power monitoring listed?
It depends on what your unit supports, not all units feed those metrics back.
I see, so only select/newer ac model comes with power monitoring support
Hi, I’ve plugged in the jst connector to CN_WIR port, I think I’ve got the 5v & gnd pin right because the LED on the d1 mini is blinking which does indicates it’s already boot up.
I did see the faikin access point for a few moment, and then it wasn’t visible anymore.
So I removed the d1 mini and plugged to my pc, I was able to connect to the access point and setup the wifi and it’s now connected to my network.
I plugged it back again to the ac, but doesn’t look like it’s connecting to my wifi network with the led still blinking.
What do you think?
Look real good!
Care to share the schematic?
it is blinking because it is resetting itself, try just to connect VCC and GND, not serial cables
I’ve disconnected the tx/rx cables, leaving only 5v & gnd. But looks like it’s still resetting with the blinking led and I heard some beeping sound that wasn’t before for a few seconds
Do I need a level shifter like in this post?
Btw, i was using esp8266-faikin, i guess i’ll try with esp32-faikin for my next attempt?
Are you using any sort of power converter like a buck converter to ensure you are getting the right voltage from the Daikin?
if it resets with only Vcc and GND connected, no level shifter can help you
to me, you are not using a good 5V power source
The Faikin units I bought have additional hardware to keep the proper voltage, I havent looked into exactly what it is, but I believe you cannot run an ESP directly off of the Daikin S21 port without a proper intermediate device giving you the correct power.
I see, I assumed it would work looking at mitsubishi ac users just connecting d1 mini directly to their ac port.
i think I’ll need to try m esp32 devboard with logic shifter to power it with 3.3v like @westwoon did.
I also have d1 mini esp32 but I’m looking at some conflicting facts if I can even power it from the vcc pin
Looking at this link:
Seems the Faikin is powered by the 12v input from the Daikin S21 port, and is capable of operating between 4v and 35v. So the 5v isn’t used to drive the hardware.