Here is some more info about the USB cable adapter:
USBpin -- color -- function
1 -- Red -- +5V
2 -- Orange -- Uart Rx (ESP8266: GPIO3) (receive data from A/C)
3 -- Brown -- Uart Tx (ESP8266: GPIO1) (send data to A/C)
4 -- Black -- GND (0V)
On the display board there is JST XH 4pin 2.5mm pitch (you can buy from ali a box with those for ~2-3$)
USB pinout is here: Universal Serial Bus (USB) - HwB
You can use some USB-A extension cable, USB-OTG cable and cut off other side, or just solder wires to USB-A socket and crimp JST XH terminals on wires.
And here is my module from bottom with added description of signals:
It’s a little hard to get to the module. If interested I can add more pictures and instructions on the procedure.
Thanks to @dudanov for the excellent module! AC is working flawlessly.
Did you get this fixed im having the same problem
Edit: sorry this was a reply to the mrcool diy that
It was just showing unknown and the swaping of rx and tx
Manufacturer: KoolKing
Model: Monosplit Serie KK (12000btu)
Year: 2021
Market: Italy - EU
Model ID: CF-KK12A Link
Notes: This KoolKing model is the same as the MrCool 3rd Gen mini split that is sold in the US (with the obvious C → F change), and it has exaclty the same module as henkvdt’s here
I used the DIY ESPhome dongle with @aceindy yaml file and it works good. Except that it shows as 0 for both Power and Humidity, even if it sees it as available characteristics.
I have the same air conditioner, is this a plug & play device or do I need to alter wires or code?
And what is the (Android) app for being able to use it?
Please be so kind and re-read the first post (or the one above yours). This is a thread to keep a list of known working devices. This thread is not for asking questions! There is a specific thread for this, you can find the link in the first post or the post above yours.
and crimp JST XH terminals on wires.
