EthernetServer.write()
Description
Write data to all the clients connected to a server. This data is sent as a byte or series of bytes.
Syntax
server.write(val)
server.write(buf, len)
Parameters
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
Returns
byte
write() returns the number of bytes written. It is not necessary to read this.
Example
#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 server.begin(); } 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: server.write(client.read()); } }