To connect your NB-IoT device to Wia, we recommend using our CoAP API. Constrained Application Protocol (CoAP) is a specialized web transfer protocol for use with constrained nodes and constrained networks in the Internet of Things. The protocol is designed for machine-to-machine (M2M) applications such as smart energy and building automation. You can find out more about it here.
To see how to get started, view our CoAP API documentation here.