[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。