Write data to all the clients connected to a server. This data is sent as a byte or series of bytes.



server.write(buf, len)


val: a value to send as a single byte (byte or char)

buf: an array to send as a series of bytes (byte or char)

len: the length of the buffer


byte write() returns the number of bytes written. It is not necessary to read this.


    #include <SPI.h>
    #include <Ethernet.h>

    // network configuration.  gateway and subnet are optional.

     // the media access control (ethernet hardware) address for the shield:
    byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
    //the IP address for the shield:
    byte ip[] = { 10, 0, 0, 177 };
    // the router's gateway address:
    byte gateway[] = { 10, 0, 0, 1 };
    // the subnet:
    byte subnet[] = { 255, 255, 0, 0 };

    // telnet defaults to port 23
    EthernetServer server = EthernetServer(23);

    void setup()
      // initialize the ethernet device
      Ethernet.begin(mac, ip, gateway, subnet);

      // start listening for clients

    void loop()
      // if an incoming client connects, there will be bytes available to read:
      EthernetClient client = server.available();
      if (client == true) {
        // read bytes from the incoming client and write them back
        // to any clients connected to the server:
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