A wireless sensor network (WSN) consists of a large number spatially distributed low-power devices (sensor nodes, SNs) that have the ability to sense the physical environment, compute the obtained information, and communicate using the radio interfaces. When a SN is depleted of energy, it can no longer fulfill its role unless the source of energy, usually a battery, is replaced. However, manual replacement or recharging of batteries is a difficult and costly task due to a huge number of deployed SNs. It means that the main challenge in a wide range of WSN applications (industry, medicine, military, smart home, environment monitoring, agriculture, etc.) is to cope with energy demands and, consequently, energy conservation and harvesting.

The main intent of the special issue is to give a review of possible power-aware design and energy harvesting solutions that go beyond the-state-of-the-art approaches. It is preferable to demonstrate novel approaches and techniques in terms of the utilization of lower bounds of energy consumption and advanced system architectures.

Therefore, this special issue welcomes articles focusing on new communication protocols and data processing algorithms that require less energy consumption in wireless sensor networks. Also, a high priority will be given to articles covering security, privacy, and fault tolerance. Finally, new materials and techniques that offer the possibility of more efficient energy harvesting from the environment and human body will be of the highest interest.

Potential topics include but are not limited to the following:

• Micropower wireless sensor node architectures
• Energy harvesting techniques in wireless sensor networks
• Energy management in wireless sensor networks
• Energy conservation in wireless sensor networks in physical, link, and network layers
• Reliable transmission and congestion control in wireless sensor networks
• Time synchronization in wireless sensor networks
• Power-aware multihop routing in wireless sensor networks
• Adaptive and reconfigurable wireless sensor networks
• Low-power long-range wireless sensor networks
• Security, privacy, and fault tolerance in low-power wireless sensor networks
• Integration of low-power wireless sensor networks into Internet of Things
• Low-power wireless sensor networks: application studies