2020-04-03 Electronic box design for W1401 Aduino temperature control board (XH-W1401). I may modify a little bit in future but it is functional as of now. Future improvement may be made for wall mounting feature.

Operation: if you set the left temperature high, it is for cooling for the temp range which can switch on/off a fan during summer season, whereas the right temperature high for warming which can switch on/off an heater(ceramic) during winter season.