How ethernet gateway code can check if is connected with controller?

[matkor]

Having arduino ethernet gateway I need to send messages with senors values to controller (Home assistant requirement to auto configure sensors).
With serial gateway simple sending in first iteration of loop:

	void loop() {
		if ( ! inital_msgs_sent ) {
			inputs.sendStates(); 
			outputs.sendStates();
			inital_msgs_sent = true;

worked.

But with ethernet controller loop starts when HA is not yet connected to GW so sent messages do not reach controller :/
So, how should I fix it?

1. Is any way to know if controller is connected ?
2. Is any way to know if controller requested presentation?
3. Is any way to know if send message really reached controller?

TIA, regards,

[matkor]

@matkor said in How ethernet gateway code can check if is connected with controller?:

1. Is any way to know if controller is connected ?
2. Is any way to know if send message really reached controller?

Seems positive send() result means message reached controller when executed on gateway?

[matkor]

Answering one of my own questions.
On ethernet gateway send() may return true when there is no connected controller, even when there is no ethernet cable plugged in. :/