[Ethernet]
Description
Writes UDP data to the remote connection. Must be wrapped between beginPacket() and endPacket(). beginPacket()
initializes the packet of data, it is not sent until endPacket()
is called. (Remarks: the maximum size of the packet is 512-byte in 86Duino, in contrast with 24-byte in Arduino.)
Syntax
// An EthernetUDP instance to let us send and receive packets over UDP EthernetUDP Udp; Udp.write(message); Udp.write(buffer, size);
Parameters
message
: the outgoing message (char)buffer
: an array to send as a series of bytes (byte or char)size
: the length of the buffer
Returns
byte: returns the number of characters sent. This does not have to be read
Example
#include <Ethernet.h> #include <EthernetUdp.h> // Enter an IP address for your controller below. // The IP address will be dependent on your local network: 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; void setup() { // start the Ethernet and UDP: Ethernet.begin(NULL,ip); Udp.begin(localPort); } void loop() { Udp.beginPacket(Udp.remoteIP(), Udp.remotePort()); Udp.write("hello"); Udp.endPacket(); }
Libraries Reference Home
The text of the 86Duino reference is a modification of the Arduino reference and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.