Constrained wireless networks face a dynamic environment, subject to constant variations due to potential changes in their physical environment, evolving application requirements, and technological advancements. These variations can affect network performance and therefore require a reconfiguration of certain protocols, or even a replacement of one protocol in favor of another. In this article, we propose a modular architecture based on programmable networks allowing fine programming of the data plane of constrained wireless networks. Such an approach allows constant adaptation of the network to dynamic variations in order to maintain the required level of performance.