Hardware Reference
In-Depth Information
EthernetServer
server
(
80
);
//
void
setup
()
{
Serial
.
begin
(
9600
);
Ethernet
.
begin
(
mac
);
server
.
begin
();
Serial
.
print
(
"server is at "
);
Serial
.
println
(
Ethernet
.
localIP
());
pinMode
(
buttonPin
,
INPUT
);
}
void
loop
()
{
EthernetClient
client
=
server
.
available
();
if
(
client
)
{
//
Serial
.
println
(
"new client"
);
boolean
currentLineIsBlank
=
true
;
//
while
(
client
.
connected
())
{
if
(
client
.
available
())
{
//
char
c
=
client
.
read
();
//
Serial
.
write
(
c
);
//
if
(
c
==
'\n'
&&
currentLineIsBlank
)
{
//
client
.
println
(
"HTTP/1.1 200 OK"
);
//
client
.
println
(
"Content-Type: text/html"
);
client
.
println
(
"Connection: close"
);
client
.
println
();
client
.
println
(
"<!DOCTYPE HTML>"
);
//
client
.
println
(
"<html>"
);
if
(
digitalRead
(
buttonPin
))
{
//
client
.
println
(
"<h1>The button is pressed!</h1>"
);
}
else
{
//
client
.
println
(
"<h1>The button is not pressed!</h1>"
);
}
client
.
println
(
"</html>"
);
break
;
}
if
(
c
==
'\n'
)
{
currentLineIsBlank
=
true
;
}
else
if
(
c
!=
'\r'
)
{
currentLineIsBlank
=
false
;
}
}
}
delay
(
1
);
client
.
stop
();
Serial
.
println
(
"client disconnected"
);
}
}
Have the server listen on port 80, the default port for HTTP (web)
communication.
If a client connects, execute the code in the following block of code.
