MQTClient.println ("ON");
And on the server I read with
String Message = MQTClient.readStringUntil ('\ r');
To proceed to turn on the led. Then I would like to send a signal to the customer to have a LED on the server LED on.
I have used server.print () on the server and on the client I read with
String Message = MQTClient.readStringUntil ('\ r'); But does nothing.
I'm sorry for English but I'm not native English and I appreciate any kind of help.