Arduino server send data to client

[JEVBR]

I got the simple-server. ino and the JS chat-client running straight out of the box, no issues, works like a charm.

my Q is, i would like to add a function in the arduino INO where i send sensor data on regular intervals to the client.

something like:

String mydata="long-data-string";
server.send(mydata);

How can i do this the best and easiest way?

[skaarj1989]

I added new broadcast function to WebSocketServer class.

Just put something like this in your code:

unsigned long previousTime = 0;

void loop() {
  server.listen();

  unsigned long currentTime = millis();
  if (currentTime - previousTime > 2000) {
    previousTime = currentTime;

    server.broadcast(TEXT, "hello", 5);
  }
}

server will send hello every 2sec to all connected clients.

Alternatively you can add callback to WebSocketServer which would react on message (i.e "getData") and send sensor data. On client side send this message ("getData") every X seconds.

[JEVBR]

That's great, the "Broadcast" really is what i needed, i had tried already as you said by "getData" but it proved to be too slow since i need to send data from the server each 100ms. Broadcast does the trick.