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en:arduino:libraries:ethernetbegin

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en:arduino:libraries:ethernetbegin [2016/12/25 22:15] (当前版本)
行 1: 行 1:
 +[[en:​arduino:​libraries:​ethernet|Ethernet]]
 +====== Ethernet.begin() ======
  
 +
 +===== Description =====
 +
 +Initializes the ethernet library and network settings.
 +
 +With version 1.0, the library supports DHCP. Using Ethernet.begin(mac) with the proper network setup, the Ethernet shield will automatically obtain an IP address. This increases the sketch size significantly.
 +===== Syntax =====
 +
 +Ethernet.begin(mac); ​
 +Ethernet.begin(mac,​ ip); 
 +Ethernet.begin(mac,​ ip, dns); 
 +Ethernet.begin(mac,​ ip, dns, gateway); ​
 +Ethernet.begin(mac,​ ip, dns, gateway, subnet); ​
 +===== Parameters =====
 +
 +**mac:** the MAC (Media access control) address for the device (array of 6 bytes). this is the Ethernet hardware address of your shield. Newer Arduino Ethernet Shields include a sticker with the device'​s MAC address. For older shields, choose your own.
 +
 +**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
 +===== Returns =====
 +
 +None
 +===== Example =====
 +<code cpp>
 +#include <​Ethernet.h>​
 +
 +// the media access control (ethernet hardware) address for the shield:
 +byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };  ​
 +//the IP address for the shield:
 +byte ip[] = { 10, 0, 0, 177 };    ​
 +
 +void setup()
 +{
 +  Ethernet.begin(mac,​ ip);
 +}
 +
 +void loop () {}
 +</​code>​
 +
 +[[en:​arduino:​libraries|Reference Home]]
en/arduino/libraries/ethernetbegin.txt · 最后更改: 2016/12/25 22:15 (外部编辑)