Worldwide Satellite Signaling

Calling Out Around the World

Use the Iridium satellite network to communicate with your projects anywhere they can see the sky.

Written by Mikal Hart


Time Required: 1–2 Hours Cost: $300–$400

Link three boards to build a global tracking beacon.


» RockBlock satellite modem Available in noncommercial, commercial, bare-board, and waterproof ruggedized forms from Rock Seven Mobile Services,

» Arduino Nano or compatible 5V microcontroller

» GPS module such as Adafruit Ultimate GPS Breakout, Maker Shed #MKAD57,

» USB cable to fit your microcontroller

» Breadboard (optional)

» USB external battery pack (optional)


» Computer PC, Mac, or Linux. Laptop preferred.

If you’re ...

Get Make: Technology on Your Time Volume 37 now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.