RockBLOCK Mk2 can send messages of 340 bytes and receive messages of 270 bytes using Iridium Short Burst Data (SBD), and comes with a variety of antenna options. The ‘naked’ version comes with either an in-built Iridium antenna, or an optional SMA connector for integrating with external antennas.
Elsewhere, a ‘rugged’ version named RockBLOCK+ comes encapsulated in a waterproof IP68 housing, and includes a 3m lead. Rock Seven claims this version is especially suitable for maritime application on workboats or ‘smart buoys’.
The manufacturer says the Mk2 is designed to work with any platform with a serial or USB port, including Arduino, Raspberry PI, Intel Edison, as well as Windows, Mac and Linux computers.
The ‘naked’ versions of the hardware are priced at £159, while the RockBLOCK+ will cost £189. Line rental for the units is £8 per month with no annual contract, and Rock Seven says individual transmissions can be sent from as little as £0.03.