Fig. 4
From: Heterogeneous wireless IoT architecture for natural disaster monitorization
WSN block diagram (Instances 1, 2, 3). The diagram shows the distribution of RPL instances 1, 2, and 3 of the wireless sensor network (WSN) defined in this work. This block diagram shows the proposed architecture with the three already mentioned RPL instances. Where Inst.1 represents the human data, Inst.2 sensor data and finally, Inst.3 it is a DTN using a mobile node placed on top of a drone