In this work, we present a novel thermomolecular communications gateway allowing communication through the human skin into the human body connecting the internet of things (IoT) with the internet of bio-nano things (IoBNT). We developed an experimental setup as a proof of concept and provide a detailed description of the testbed, its assembly and fabrication. Mathematical models for all components are derived and verified experimentally. Finally we analyze the communications performance of the system and elaborate on future works.