Thanks so much for this! Works on my Pioneer WS009GMFI17HLD.The thermostat for this unit is horrible about staying reasonably close to the set temperature, and this made it so I could automate my own thermostat! Life is much better
I’m trying to make my Mr Cool diy 12k working so far all I get is unknown for everything and it shows 32°F any ideas as to what I’m doing wrong? I’ve swapped TX and Rx to no help.
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