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.