This is a simple case for a ESP8266 NodeMCU and a relay Module (in the pictures, 53.1x18mm). perfect for your home automation projects. you'll just need 4 screws for the lid (I used 4/40, I guess M3 do the job too), the boards are clipped in.
| esp_relay_case.stl |
| esp_relay_lid.stl |
