wifi gate

Passes a message through unchanged while the board's WiFi is connected, and drops it while it isn't.

Properties

• WiFi — the flow's WiFi network, shared by every WiFi node in the flow.

Wiring

Input — any message.

Output — the same message, unchanged, while the link is up. While it is down, nothing is sent on, as when a function node returns None.

Behavior

The gate checks the live WiFi link as each message arrives. It doesn't use the last message from wifi status, which sends only when the connection changes and can be out of date.

Put it between a source that fires on its own schedule, such as a timer or a sensor, and a node that sends over the network. Messages that arrive while the link is down are dropped instead of failing downstream.

It checks the WiFi link only, not whether a given MQTT broker or HTTP server can be reached. mqtt publish, mqtt subscribe and http request handle their own connections on top of a working link.