Summary

This chapter has given us an overview of the design of machine-to-machine distributed systems and IoT services, including connected embedded devices, with a focus on security elements that are too often overlooked or underestimated in embedded development. The technology proposed allows full, professional-grade, secure, and fast TCP/IP connectivity on very small targets and uses state-of-the-art technology, such as the most recent version of the TLS cipher suites. Several approaches have been considered, both in terms of hardware and software technologies available for microcontroller-based targets, for a broader view of the technologies, protocols, and security algorithms available for building distributed embedded systems.

The next chapter will illustrate the multitasking possibilities of modern embedded microcontrollers by explaining how to write a small scheduler for Cortex-M microprocessors from scratch, and will summarize the key roles of a real-time operating system...