John Grant built MyComm,  a very clever solar global messaging device.

MyComm is a portable messaging device that allows users to send messages from anywhere on Earth.  It uses the Iridium satellite system to offer coverage beyond traditional cellular and WiFi networks.  Because it’s solar powered you don’t need to worry about battery life.

Code for the project can be found on BitBucket

Details on how to set up a MyComm Server is documented on this page and the code is available on GitHub.

https://github.com/johngrantuk/myCommServer