Nowadays, many networks are deployed in a mesh topology. Especially, most wireless sensor networks also use multi-hop or mesh communication to exchange sensor data between devices. Increasing the number of nodes leads to the requirement of flexible deployment and configuration in such networks. Taking advantage of software-defined networking (SDN), this article discusses applying the SDN concept to manage wireless mesh sensor networks, in which the network management is carried out with the assisted SDN controller. Based on the simulation models, a series of computer experiments was performed to evaluate the network performance with and without SDN support. Based on the simulation results, the wireless mesh network supported by the SDN controller showed more efficiency in bandwidth, jitter time, and packet loss.