When creating a Luos network, if you have a product with several nodes, it is mandatory to configure your MCU, to create the physical layer. In Luos's examples on GitHub, Luos uses RS485 with a driver or one-wire communication for this physical layer (see Electronic design page), but other communication ways are possible.
Board examples and driver sources are available on GitHub. We encourage you to use them in the way you want.
You can find the schematic of a Luos-ready board called L0 on Github for a quick hardware example.