Figure 13.

Outlook for flexible sensor networks. Black arrows denote connectivity. A group of sensor nodes can communicate within themselves and may be accessed by more than one cloud server. Due to dense connection, the two networks merge into one. Ultimately, numerous sensor nodes may be connected in a ‘meganetwork’ involving more gateways and servers (dot-outlined shapes). Cloud computing and fog computing will be instrumental in the realization of extensive sensor connectivity. Images for “imperceptible form factors”: Adapted with permission from ref 829. Copyright 2019 Springer Nature. Adapted with permission from ref 658. Copyright 2021 Springer Nature. Adapted with permission from ref 298. Copyright 2021 Springer Nature.