For those having access to a 3D printer, I just shared a printable case I made to support:
- Mega 2560
- 2 printable antenna to hold hold standard 17.3 cm wire from SYN115. The antennas are screwable into the 2 holes, can be removed for transport.
- Support and maintain a 3.3V/5V level shifter
- Support standard NodeMCU V1.0
It's there: https://www.thingiverse.com/thing:2644063