Case ESP32 C3 SuperMini cho Mitsubishi AC (CN105)

I wanted to make a simple case for the smallest ESP32C3 that I could find for use within a Mitsubishi AC. There is a CN105 port on several Mitsubishi ACs that allow you to control the unit remotely without spending $100+ on an official WiFi controller.

There is a brilliant project esphome-mitsubishiheatpump that allows you to setup and configure the microcontroller in ESPHome for integration into Home Assistant.

I spent some time ensuring the board is supported, space is provided for the right angle pins, and that there is sufficient room for the DuPont cable to fit snugly.

I've printed this in both PLA and PETG so it's dealers choice. The photos are all PETG hence the stinging between the gaps in the lid. You don't need any supports or brims to print nicely, and a default of 15% infill is fine. I've printed in 0.2mm and 0.16mm and both are fine on a 0.4mm nozzle.

Please note:  You need to open the AC to install this and there is high voltage power within reach. You are performing this at your own risk and in many jurisdictions electrical work needs to be conducted by a licensed professional. 

I take no responsibility or risk from you harming yourself or damaging your AC. 

You have been warned.  

Software

esphome-mitsubishiheatpump | By geoffdavis

https://github.com/geoffdavis/esphome-mitsubishiheatpump/tree/develop

Note: you need to set the following in the ESPHome yaml file.

climate:

  - platform: mitsubishi_heatpump

    hardware_uart: UART0

    baud_rate: 2400

    rx_pin: 1

    tx_pin: 0

logger:

  hardware_uart: UART1

Hardware

ESP32 C3 SuperMini

https://www.aliexpress.com/item/1005005967641936.html?spm=a2g0o.order_list.order_list_main.140.7b7c1802rma1IY

https://www.tindie.com/products/adz1122/esp32-c3-development-board-esp32-supermini/

Premade CN105 To DuPont Cable

https://www.ebay.com.au/itm/285315164757?mkcid=16&mkevt=1&mkrid=705-154756-20017-0&ssspo=0ZC1rScdTvi&sssrc=2047675&ssuid=C0ZP1rOwSpa&widget_ver=artemis&media=COPY

https://www.ebay.com.au/itm/195638256211?mkcid=16&mkevt=1&mkrid=705-154756-20017-0&ssspo=6FPJ1mBoRcC&sssrc=2047675&ssuid=C0ZP1rOwSpa&widget_ver=artemis&media=COPY

40 Pin Headers Right Angle Single Row 2.54mm Pitch Male Header

https://core-electronics.com.au/0-100-2-54-mm-breakaway-male-header-1x40-pin-right-angle.html

https://www.amazon.com/Headers-Single-2-54mm-Breadboard-10-Piece/dp/B01EWSOGG4