Wireless Sensor Networks (WSN) are constrained by their Radio Access Technologies' (RAT) capabilities. In Multiple Technologies Network (MTN) nodes are able to use several RAT in a multi-hop scheme. The routing and RAT selection is handled by the nodes with dedicated protocols. In this article, we present our current work and future plans for a Routing Over Different Existing Network Technologies (RODENT) protocol designed for MTN. It enables dynamic (re)selection of the best route and RAT based on the data type and requirements. RODENT is based on a multi-criteria route selection via a custom lightweight TOPSIS method. We have implemented a functional prototype on Pycom FiPy devices. RODENT increases flexibility, coverage and energy savings while supporting multiple data requirements.