The Newcomer Tool Kit provides (1) a discussion of topics relevant to understanding, supporting, and engaging newcomer students and their families; (2) tools, strategies, and examples of classroom and schoolwide practices in action, along with chapter-specific professional learning activities for use in staff meetings or professional learning ...
Thus all devices of the protocol can interact. ZigBee ensures that networks remain operable in the conditions of a constantly changing quality between communication nodes. ZigBee standard defines a multilayer structure of software. Usually this is called ZigBee protocol stack. Despite the declared simplicity ZigBee stack is not much simpler than TCP/IP protocol stack for small-class add-in devices.It is very costly to purchase the stack in source texts. The stack is usually offered in the form of compiled libraries, also at high prices.
The technology defined by the ZigBee specification is intended to be simpler and less expensive than other wireless personal area networks (WPANs), such as Bluetooth or Wi-Fi.igBee-style self-organizing ad-hoc digital radio networks were conceived in the 1990s. The IEEE 802.15.4-2003 ZigBee specification was ratified on December 14, 2004. The ZigBee Alliance announced availability of Specification 1.0 on June 13, 2005, known as the ZigBee 2004 Specification.