ONLINE: the first connection to wifi is mandatory in order to get the time from NTP servers;
OFFLINE: once it retrieves the time from NTP servers, it stores it in the RTC module. Now wifi is optional.
🟠 How to print
Layer width: 0.4
Layer height: 0.3
Perimeters (case): 3
Supports (case): yes
Perimeters (lid): 1
Supports (lid): no
⚙ What you need
Wemos D1 MINI (mine is V3.0.0) or Wemos S2 mini
TM1637 module https://a.aliexpress.com/_EuPY34F
(optional) RTC module DS1307
x9 M2.5x6 screws and x3 M2.5 nuts
(optional) 12mm waterproof button
A small piece of breadboard
Wires
⚪Other
Nuts should be embedded in the case, so remember to add a pause on your slicer, at the right layer (91 if you print with 0.3) , in order to put them in their spots!
Because D1 mini has only 1 GND pin, and we need at least 2 GND pins, the solution i came up was to cut a piece of breadboard, drilling it, solder 3 headers and wiring it to the D1 mini GND, in order to have a GND expander.
About TM1637 module: you can mount it with 3 or 2 screws, because the 4th one isn't so reachable