Designing Embedded Hardware Ebook By John Catsoulis
If you want to build your own embedded system, or tweak an existing one, this invaluable book gives you the understanding and practical skills you need.
NanoStack is a 6lowpan IPv6 + IEEE 802.15.4 protocol stack, enabling wireless embedded and sensor networking. The goal is to help 6lowpan spread globally and to encourage new features from the IETF and ISA100 to be implemented and tested.