available()
描述
取得一个与伺服端连线并且有资料要传送给伺服端的用户端。这个用户端的连线并不会因为 Client 物件解构而中断,如果要中断连线可以呼叫 client.stop()。
available() 是从 Stream 继承而来。
语法
server.available()
参数
无参数
回传
Client:如果没有连线中的用户端或是连线中的用户端都没有资料可以读取,这个回传的 Client 物件等同于 false(参考以下范例)
范例
#include <WiFi.h>
char ssid[] = "Network"; // 无线网路的 SSID
char pass[] = "myPassword"; // WPA 的密码
int status = WL_IDLE_STATUS;
WiFiServer server(80);
void setup() {
// 初始化序列埠
Serial.begin(9600);
Serial.println("Attempting to connect to WPA network...");
Serial.print("SSID: ");
Serial.println(ssid);
status = WiFi.begin(ssid, pass);
if ( status != WL_CONNECTED) {
Serial.println("Couldn't get a wifi connection");
while(true);
}
else {
server.begin();
Serial.print("Connected to wifi. My address:");
IPAddress myAddress = WiFi.localIP();
Serial.println(myAddress);
}
}
void loop() {
// 监听是否有用户端传送请求
WiFiClient client = server.available();
if (client) {
if (client.connected()) {
Serial.println("Connected to client");
}
// 关闭连线
client.stop();
}
}
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.
