Main components | Model number | Supplier | Cost (US$) |
Microcontroller | SAMD21 Mini | Sparkfun Electronics | 21 |
Cellular shield | LTE CAT-M1 | Botletics | 70 |
Rechargeable battery | 3.7 V LiPoly, 2500 mAh | Adafruit Industries | 15 |
Weatherproof enclosure | NBF-32004 | Digikey Electronics | 10 |
Miscellaneous (prototype shield, terminal blocks, resistors, SIM card) | 14 | ||
Total |
|
| 130 |
Cellular data plan | 1 MB/month | Hologram.io | 1/month |