There has been a keen interest in detecting abrupt sequential changes in streaming data obtained from sensors in wireless sensor networks for Internet of Things applications, such as fire/fault detection, activity recognition, and environmental monitoring. Such applications require (near) online detection of instantaneous changes. This paper proposes an online, adaptive filteringbased change detection (OFCD) algorithm. Our method is based on a convex combination of two decoupled least mean square windowed filters with differing sizes. Both filters are applied independently on data streams obtained from sensor nodes such that their convex combination parameter is employed as an indicator of abrupt changes in mean values. An extension of our method (OFCD) based on a cooperative scheme between multiple sensors (COFCD) is also presented. It provides an enhancement of both convergence and steady-state accuracy of the convex weight parameter. Our conducted experiments show that our approach can be applied in distributed networks in an online fashion. It also provides better performance and less complexity compared with the state-of-the-art on both of single and multiple sensors. Index Terms-Cooperative (diffusion-based) strategy, mean change detection, multi-sensory data, streaming data. I. INTRODUCTION R ECENT advances in sensing and actuator technologies in wireless sensor network (WSN) and the further evolution of the Internet of Things (IoT) paradigm enable each sensor in a network to collect large quantities of measurement and observation data streams. This empowers monitoring and detecting a wide range of real-world phenomena in areas, such as environmental monitoring, segmentation, quality control, healthcare, and smart city [1]-[3].