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