Developing Applications for the RIM BlackBerry by P.V. Subramanian Research in Motion markets its BlackBerry keyboard pager as an email tool for executives. But it's also a fully programmable handheld computer. This article describes the BlackBerry's hardware and software, the wireless protocols it uses, and how to develop a sample application. But four new standards coming online this year will complicate the choice. In this first article, the team successfully links two antennae across a 5-mile wide valley at 11 MBps.
Article includes a chart and three photos.
Schuyler Erle shows you how to do it on even the tightest budget. Using SSH Tunneling by Rob Flickenger UC Berkeley researchers have found weaknesses in the Wired Equivalent Privacy algorithm used in the 802.11 wireless LAN standard. Don't say that to tech writer John Ochwat whom we talked into assembling one for this article. An Introduction to Differential GPS by Chris Halsall Differential GPS helps overcome the inherent inaccuracies of civilian GPS devices. But it's expensive.