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Ethernet : Server class
Write data to all the clients connected to a server. This data is sent as a byte or series of bytes.
server.write(val)
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
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
(
)
)
;
}
}
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The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.