That cheap plastic box I ordered on Amazon took quite some time to be delivered... until I realized it was shipped from China.
The size is just perfect. I cut a few holes, one for plugging in an USB C cable (to allow direct reprogramming without having to take everything out of the box), one to pass the cable from the air conditioner and I added a small light pipe so the microcontroller LEDs could be seen. All was fixed using my best friend number 2, hot glue.
![](https://cdn.hackaday.io/images/347991622872829213.jpg)
The final result looks like this (case hold with blu tack):
![](https://cdn.hackaday.io/images/9117241622872880721.jpg)
I may redo the cable that connects to the air conditioner motherboard but for the time being, I'm happy with how it looks.
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