| Quantity | Component name | |
| 1 | × | Seeed XIAO nRF52840 Sense |
| 1 | × | 1S LiPo 3.7 V 100 mAh with BMS/protection |
| 1 | × | 20 mm hydrophobic PTFE filter membrane disc |
| 1 | × | 10 mm quick-release safety collar |
| 1 | × | Seeed XIAO ESP32-S3 — BLE to WiFi gateway |
| 1 | × | USB-C cable and 5 V supply |
Jerome Graves