For the IoTPortal Gateway, is it recommended to use WiFi or Ethernet to connect to the on-premises router?

Connecting the IoTPortal Gateway via a wired Ethernet (or PoE) link offers higher throughput and is less likely to suffer from interference when compared with WiFi. Wired connections can also be more convenient, avoiding the need to reconfigure the wireless settings in the case that the access point in the premises changes. It is more difficult for bad actors to intercept data on a wired network compared to a wireless network which makes for improved security of communications over wireless networks. Having a reliable and continuous internet connection for the IoTPortal Gateway is important for ensuring responsive alerting and event condition checking and actuation control.