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Fireduino WiFi Client

更新时间:2017-08-08 阅读:1720

Fireduino WiFi Client

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 Client 流程

第一步:

创建一个 WiFiClient对象,接着调用对象函数connect函数进行连接至远程主机,函数参数有2个,分别为远程主机IP地址以及端口号。

第二步:

在第一步创建连接后成功后,即可向服务器端发送数据了,同时可以接受来自服务器端的数据,通过调用available函数获取数据大小后读取。

第三步:

完成数据传输后可以调用 stop 函数 结束传输与关闭传输的TCP通道。

示例程序 -- HTTP Client

#include <WiFi.h>
 
char ssid[] = "yourNetwork"; //  your network SSID (name)
char pass[] = "secretPassword";    // your network password 
 
int status = WL_IDLE_STATUS;
// if you don't want to use DNS (and reduce your sketch size)
// use the numeric IP instead of the name for the server:
//IPAddress server(74,125,232,128);  // numeric IP for Google (no DNS)
char server[] = "www.google.com";    // name address for Google (using DNS)
 
// Initialize the Ethernet client library
// with the IP address and port of the server
// that you want to connect to (port 80 is default for HTTP):
WiFiClient client;
 
void printWifiStatus();
 
void setup() {
  //Initialize serial and wait for port to open:
  Serial.begin(115200);
  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);
  }
  Serial.println("Connected to wifi");
  printWifiStatus();
 
  Serial.println("\nStarting connection to server...");
  // if you get a connection, report back via serial:
  if (client.connect(server, 80)) {
    Serial.println("connected to server");
    // Make a HTTP request:
    client.println("GET /search?q=arduino HTTP/1.1");
    client.println("Host: www.google.com");
    client.println("Connection: close");
    client.println();
  } else {
    Serial.println("Fail to connect to server");
  }
}
 
void loop() {
  // if there are incoming bytes available
  // from the server, read them and print them:
  while (client.available()) {
    int c = client.read();
    if (c >= 0) {
      Serial.write(c);
    }
  }
 
  // if the server's disconnected, stop the client:
  if (!client.connected()) {
    Serial.println();
    Serial.println("disconnecting from server.");
    client.stop();
 
    // do nothing forevermore:
    while (true);
  }
}
 
 
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");
}