When we created self-owned things in the previous chapter, they had to take decisions by themselves. In this chapter, as we introduce provisioning and the concept of ownership, we have an alternative. As soon as something happens in the network that the thing does not know how to respond to, it can ask the provisioning server, who will help the thing answer the question. The provisioning server, in turn, will ask the corresponding owner, if it does not know the answer. An example sequence is illustrated in Figure 2. The questions we will focus on are:
- Can an entity subscribe to presence?
- Can an entity read the device, and how much?
- Can an entity control the device, and which parameters?
The provisioning server ...