Developers are faced with two approaches to designing connected wireless sensor and M2M apps: bottom up IoT, which focuses on low-level network and transport issues on the devices, and the top-down Web of Things, where existing Internet and Web protocols are adapted to device connectivity.

Why resource-constrained MCUs for the IoT need an operating system appropriate to the connectivity and how the jNet's JavaCard-based OS can satisfy this requirement.

A new IoT architecture based on the Constrained Application Protocol (CoAP) for resource-constrained devices that takes advantage of the HTML services of the Web of Things by means of a new Web protocol for use in cloud environments.

A real-time Java-centric networking architecture for industrial systems that combines real time Java with the JINI fault-tolerant discovery framework and the DDS (Data-Distribution Service)

For developers who use Java in the development of their real time embedded system design it is necessary to carefully balance hard real time versus soft real time performance and the trade offs they are willing to make to achieve their goals.

The use of a Java-based Web of Things kit (WoTKit) to build mashups that can link low level Internet of Things implementations with Web based protocols such as to build a variety of wireless sensor and machine to machine networks.

Improving the performance of Java on OSGi service platforms with architecture freezing, which blocks the application's architecture during real-time execution periods and uses a monitoring system to control reconfigurations at non-critical execution periods.

A new framework for integrating OSGi and real time operations that combines use of real-time Java virtual machines and the Real-Time Specification for Java.

Chris Porthouse of ARM reviews the traditional software-only and hybrid Java techniques and described how the Jazelle DBX hardware accelerated approach can be used to full advantage in space-contrained apps.

Greg Bollella of Sun describes the scheduling subsystem in the Real Time Specification for Java and how it can be used to solve problems, such as writing UNIX signal handlers in Java, periodic processes, sporadic processes, and asynchronous event handlers

This is the first tutorial in a series on the basics of the Data Distribution Service versus the Java Messaging Service as real time, deterministic mechanisms for linking enterprise systems with distributed microcontrollers, sensors and actuators.

When it comes to distributed computing, JMS is Eric J. Bruno's tool of choice when reliability and performance are top priorities.