Power management is an important issue in the design of Energy Harvesting Wireless Sensor Networks (EH-WSNs). In this kind of networks, each Energy Harvesting Node (EH-node) must dynamically adapt its performance in order to avoid power failures while maintaining a good quality of service. The power management policy is implemented on each node by a Power Manager (PM). In this demonstration, the behaviour of Fuzzyman, a novel PM based on fuzzy control, is introduced. The performance of this PM is also shown in terms of energy budget and throughput for a given protocol. Moreover, the benefit of using emerging wake-up radio technology is also demonstrated.