Fireduino 开源创意平台 立即购买

拥有双核Cortex-M3处理器,集成高质量音频Codec和WiFi模组,拥有良好的IOT扩展性能,完美兼容Arduino IDE和Arduino标准接口,并支持FireBlock图形化编程软件,是一款首选的编程启蒙教学平台,更是一款开源的创意原型平台。

Fireduino WiFi Server

更新时间:2017-08-08 阅读:1555

Fireduino WiFi Server

Fireduino SDK 为WiFi 提供了一套完善的API,该组API兼容Arduino WiFi Shield 示例。

Fireduino WiFi Server 流程

相对于客户端的实现,服务器端的实现稍复杂一点。

第一步:

创建一个 WiFiServer 对象,其参数为表监听的端口号,接着调用对象函数begin函数告诉Server对象开始进行监听客户端的连接。

第二步:

如果客户端连接入服务器端上时,可以通过server对象函数available获取连入的客户端对象。在此客户端对象进行数据收发。

第三步:

完成数据传输后可以调用客户端对象 stop 函数 结束传输与关闭传输的TCP通道。

示例程序 -- Telnet

#include <WiFi.h>
char ssid[] = "yourNetwork"; //  your network SSID (name)
char pass[] = "secretPassword";    // your network password
 
int status = WL_IDLE_STATUS;
WiFiServer server(23);
boolean alreadyConnected = false; // whether or not the client was connected previously
void setup() {
  //Initialize serial and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }
  // check for the presence of the shield:
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present");
    // don't continue:
    while (true);
  }
  String fv = WiFi.firmwareVersion();
  if (fv != "1.1.0") {
    Serial.println("Please upgrade the firmware");
  }
  // attempt to connect to Wifi network:
  while (status != WL_CONNECTED) {
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(ssid);
    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
    status = WiFi.begin(ssid, pass);
    // wait 10 seconds for connection:
    delay(10000);
  }
  // start the server:
  server.begin();
  // you're connected now, so print out the status:
  printWifiStatus();
}
void loop() {
  // wait for a new client:
  WiFiClient client = server.available();
  // when the client sends the first byte, say hello:
  if (client) {
    if (!alreadyConnected) {
      // clead out the input buffer:
      client.flush();
      Serial.println("We have a new client");
      client.println("Hello, client!");
      alreadyConnected = true;
    }
    if (client.available() > 0) {
      // read the bytes incoming from the client:
      char thisChar = client.read();
      // echo the bytes back to the client:
      server.write(thisChar);
      // echo the bytes to the server as well:
      Serial.write(thisChar);
    }
  }
}
void printWifiStatus() {
  // print the SSID of the network you're attached to:
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());
  // print your WiFi shield's IP address:
  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);
  // print the received signal strength:
  long rssi = WiFi.RSSI();
  Serial.print("signal strength (RSSI):");
  Serial.print(rssi);
  Serial.println(" dBm");
}