Ideal installation with the M5Stack NanoC6!

[cortices]

Wanted to note how extremely easy it was to get this working with the M5Stack NanoC6 and one HY2.0-4P cable from them.

By coincidence the pinout lines up exactly with pins 2-5 of the Mitsubishi CN105, which means all I had to do was trim one tiny bit of plastic off the connector to fit in CN105 leaving pin 1 (12V) empty, and it was ready to go.

My post: https://cathode.church/@s0/113509209574322642

My ESPHome yaml:

substitutions:
  deviceName: "Study AC"
  deviceId: studyac

packages:
  wifi: !include _wifi.yaml

esphome:
  name: $deviceId
  platformio_options:
    board_build.flash_mode: dio
    board_build.extra_flags:
      - "-DARDUINO_USB_CDC_ON_BOOT=0"

esp32:
  board: esp32-c6-devkitc-1   # Actually M5Stack NanoC6
  variant: esp32c6
  flash_size: 4MB
  framework:
    version: "5.3.1" 
    platform_version: "6.9.0" 
    type: esp-idf

# Enable logging
logger:
  hardware_uart: uart0


uart:
  id: AC_UART
  baud_rate: 2400
  tx_pin: 1
  rx_pin: 2

# External component reference
external_components:
  - source: github://echavet/MitsubishiCN105ESPHome

# Climate entity configuration
climate:
  - platform: cn105
    id: $deviceId
    name: $deviceName
    uart_id: AC_UART
    update_interval: 3s        # update interval can be adjusted after a first run and logs monitoring 

[elreydetodo]

I'm planning to make the same mod to my heat pump soon. I'd already bought an AtomS3 Lite to run it, and some cn105 cables on Ali Express I was planning to splice.

Is this the cable you started with? I had trouble figuring out some of their terminology when picking stuff to buy, so didn't end up getting any spare cables. If I understand this better, I think this might be better in my case because the cn105's I bought have female pin heads on the end of them.

For connecting the cn105 connector, where did you get that connector? How do you crimp it? I'm not very familiar with the different types of connectors that exist, where to get them, or how to crimp them. Pointers would be appreciated.

[cortices]

Yep, that's the cable. The pin header will not work, because CN105's pin pitch is 2mm, so 2.54mm Dupont pins cannot be installed and work (also the pins are too short).

As I described, I didn't buy or crimp any connector. Reread my explanation -- I just clipped one plastic alignment guide off the M5stack cable and inserted it directly into CN105.

[disruptivepatternmaterial]

I would only use m5 for these things. They JUST WORK, I too use the M5Stack NanoC6 because I have the hope one day to move it off an IP stack to simply my life :)

I also have programmed the led on these little things to tell me what's happening...they flash a little when they cannot find HA, etc... and in my case I exposed the button to the outside so I can reset them just in case.