1. Seat the XIAO nRF52840 Sense and the LiPo in the collar back shell.

2. Fit the 20 mm PTFE membrane over the mic hole on the inside of the front shell.

3. Close the front and back shells and bond them with water-resistant glue.

4. Slip the sealed assembly into the TPU skin and attach it to the quick-release collar.

5. Seat the XIAO ESP32-S3 in the station shell and glue it closed.

6. Flash both boards and register them to your Firebase project.

Print files (4 STLs), firmware for both boards, the Firebase setup and the full
technical reference are all in the repo:
https://github.com/Jerome-Graves/meowtion