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目錄

EthernetUDP.write()

[Ethernet]

描述

Writes UDP data to the remote connection. Must be wrapped between beginPacket() 以及 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.)

語法

// An EthernetUDP instance to let us send and receive packets over UDP
EthernetUDP Udp;

Udp.write(message);
Udp.write(buffer, size);

參數

  • message: the outgoing message (char)
  • buffer: an array to send as a series of bytes (byte or char)
  • size: the length of the buffer

回傳

byte: returns the number of characters sent. This does not have to be read

範例

#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();
}

函式庫參考主頁面

86Duino 參考的文本是根據 Creative Commons Attribution-ShareAlike 3.0 License,部分文本是從 the Arduino reference 修改的。 參考中的代碼示例已發佈到公共領域。

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