Unfortunately, the 276mm wide housing for four digits cannot be easily printed on a normal 3D printer. 

That's why I designed an alternative housing. The individual digits can be pre-assembled and then screwed onto a bracket. In this way, even more than four digits can be "daisy chained" one after the other, for example to display five-digit numbers or longer words directly. 

You can see the start animation on the video. After the start, the time is retrieved from an NTP server via the WiFi connection of the ESP32.⁣