| Future Internet of Things (IoTs) networks are likely to have RF-energy harvesting sensor devices and also solar-powered Hybrid Access Points (HAPs) that help monitor one or more targets such as assets in a warehouse. In this setting, we outline three contributions that ensure devices monitor targets at all times and upload the maximum number of samples to a HAP in order to ensure high monitoring quality. First, we outline a Mixed Integer Linear Program (MILP) and use it to optimize the transmission power of HAPs and time used by devices to harvest RF energy, monitor target(s) and data transmissions. Second, we propose two heuristic algorithms to solve large problem instances. The results show that our heuristics achieve almost 97% of the optimal result computed by the MILP |