28.03.25 – I finally updated the design after wanting to do so for a long time but never having the time. These are the improvements I needed: • Sturdy top cover, now securely fastened with M3 screws • Access hole in the cover for screwdriver access to the terminal blocks without removing the lid • Reinforced overall structure for better durability and stability • Improved mounting system – easily attachable to wooden surfaces using standard screws (e.g. 3x16 Spax) • Optimized airflow to prevent overheating of components (e.g. ESP-01)

05.07.21 – I've already looked for such a case here on Thingiverse but unfortunately couldn't find one, so I simply designed one myself. It is a housing for one of the cheap ESP-01 Relays which you can buy on Ebay or amazon. Since I am still a beginner with 3d printing, it took a while until I got a good result. (Seen here in blue.) The housing has a lid which can be clicked onto it.

Printing:

ESP-01 Relay Lid , 100% Infill needed, no supports. ESP-01 Relay Box , 25% Infill , supports for the Cable Holes.