A case for a mesh (Heltec V3 board). 18650 battery, EC11 encoder, computer speaker and KCD11 switch. The speaker can be fixed with hot glue, and I also advise you to fix the board with a drop of hot glue at the top, where the antenna is, after installation. Connection Encoder
Contact A - Heltec 5
Contact B - Heltec 6
Contact GND - Heltec GND
Encoder Button
Contact Button - Heltec 7
Contact GND - Heltec GND
Speaker + - Heltec 45
Speaker - - Heltec GND
Contacts can be reassigned in the phone application.

The PETG material was printed with minimal blowout (20%), with supports so that the holes did not have to be modified.