Is it possible to send data from the access point (nodemcu board) to the conn. to her station?

Question

WiFi

I have two NodeMcu boards.
One reads data from sensors and sends it to a web server that it creates. And plus, it is an access point.

The second board controls the relay in the outlet. It is a station that connects to an access point.

I have already configured them so that the station sends a simple message to the access point every 5 seconds:
sending data from the station.


Receiving data at the access point.


This can be used to send relay status to an access point. Then I plan to display this status on the web server in the form of a button (ON / OFF).

But is it possible to set up a reverse transmission so that when a button is pressed on the site, this is recorded by the access point and it sends a new status to the station? The station in turn will switch the relay.

UPD: Or advise other connection options. For example, is it possible to write your own mqtt broker based on the same nodemcu? And how then to connect to it other nodes?

Answer 1

Yes, you can. Make a web server on the relay board as in the one with sensors and when you press a button on the page of the first board, send data to the second board in the same way as the second one now sends data to the first one.