Ethernet : UDP.remotePort()
Gets the port of the remote UDP connection.
This function must be called after UDP.parsePacket().
UDP.remotePort();
None
int : the port of the UDP connection to a remote host
#include <SPI.h>
#include <Ethernet.h>
#include <EthernetUdp.h>
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[
]
=
{
0xDE
,
0xAD
,
0xBE
,
0xEF
,
0xFE
,
0xED
}
;
IPAddress ip(
192
,
168
,
1
,
177
)
;
unsigned
int localPort =
8888
; // local port to listen on
// An EthernetUDP instance to let us send and receive packets over UDP
EthernetUDP Udp;
char packetBuffer[UDP_TX_PACKET_MAX_SIZE]
;
//buffer to hold incoming packet,
void
setup
(
)
{
// start the Ethernet and UDP:
Ethernet.begin
(mac,ip)
;
Udp.begin
(localPort)
;
}
void
loop
(
)
{
int packetSize = Udp.parsePacket
(
)
;
if
(packetSize)
{
Serial.print
(
"Received packet of size "
)
;
Serial.println
(packetSize)
;
Serial.print
(
"From "
)
;
IPAddress remote = Udp.remoteIP
(
)
;
for
(
int i =
0
; i <
4
; i++
)
{
Serial.print
(remote[i]
,
DEC
)
;
if
(i <
3
)
{
Serial.print
(
"."
)
;
}
}
Serial.print
(
", port "
)
;
Serial.println
(Udp.remotePort
(
)
)
;
// read the packet into packetBufffer
Udp.read
(packetBuffer,UDP_TX_PACKET_MAX_SIZE)
;
Serial.println
(
"Contents:"
)
;
Serial.println
(packetBuffer)
;
}
}
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.