查看WiFi.config()的源代码

:[[WiFi库|WiFi]]

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<font color="olivedrab" size="+3">'''config()'''</font>


<font color="orange" size="+1">'''描述'''</font>


<span style="background:lightblue">WiFi.config()</span> allows you to configure a static IP address as well as change the DNS, gateway, and subnet addresses on the WiFi shield.


Unlike <span style="background:lightblue">WiFi.begin()</span> which automatically configures the WiFi shield to use DHCP, <span style="background:lightblue">WiFi.config()</span> allows you to manually set the network address of the shield.


Calling <span style="background:lightblue">WiFi.config()</span> before <span style="background:lightblue">WiFi.begin()</span> forces <span style="background:lightblue">begin()</span> to configure the WiFi shield with the network addresses specified in <span style="background:lightblue">config()</span>.


You can call <span style="background:lightblue">WiFi.config()</span> after <span style="background:lightblue">WiFi.begin()</span>, but the shield will initialize with <span style="background:lightblue">begin()</span> in the default DHCP mode. Once the <span style="background:lightblue">config()</span> method is called, it will change the network address as requested.


<font color="orange" size="+1">'''语法'''</font>

WiFi.config(ip); 

WiFi.config(ip, dns); 

WiFi.config(ip, dns, gateway); 

WiFi.config(ip, dns, gateway, subnet); 


<font color="orange" size="+1">'''参数'''</font>

'''ip''': the IP address of the device (array of 4 bytes)

'''dns''': the address for a DNS server.

'''gateway''': the IP address of the network gateway (array of 4 bytes). optional: defaults to the device IP address with the last octet set to 1

'''subnet''': the subnet mask of the network (array of 4 bytes). optional: defaults to 255.255.255.0


<font color="orange" size="+1">'''返回值'''</font>

Nothing


<font color="orange" size="+1">'''示例'''</font>

This example shows how to set the static IP address, 192.168.0.177, of the LAN network to the WiFi shield:

<pre style="color:dimgray">
#include <SPI.h>
#include <WiFi.h>

// the IP address for the shield:
IPAddress ip(192, 168, 0, 177);    

char ssid[] = "yourNetwork";    // your network SSID (name) 
char pass[] = "secretPassword"; // your network password (use for WPA, or use as key for WEP)

int status = WL_IDLE_STATUS;

void setup()
{  
  // Initialize serial and wait for port to open:
  Serial.begin(9600); 
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }

  // check for the presence of the shield:
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present"); 
    while(true);  // don't continue
  } 

  WiFi.config(ip);

  // 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);
  }

  // print your WiFi shield's IP address:
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP()); 
}

void loop () {}
</pre>

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