the main functions of gateways in iot applications are:

1. Manage non-IP node devices, converting the data, use IP communication protocol to connect to a remote cloud server.
2. If necessary, perform preliminary calculations on the data of the receiving node device to immediately respond to the node device or send it to the cloud server.

nuvoton provides numicro nuc980 series with arm9 core, runs embedded linux v4.4, and supports rich network protocols. there is also the numicro m487 series with cortex-m4 core, runs mbedos v5 or other rtos, which is suitable for lightweight and simple gateways.