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en:arduino:libraries:ethernetlocalip [2016/12/25 22:15] |
en:arduino:libraries:ethernetlocalip [2016/12/25 22:15] (当前版本) |
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+ | [[en:arduino:libraries:ethernet|Ethernet]] | ||
+ | ====== Ethernet.localIP() ====== | ||
+ | |||
+ | ===== Description ===== | ||
+ | |||
+ | Obtains the IP address of the Ethernet shield. Useful when the address is auto assigned through DHCP. | ||
+ | ===== Syntax ===== | ||
+ | |||
+ | Ethernet.localIP(); | ||
+ | ===== Parameters ===== | ||
+ | |||
+ | none | ||
+ | ===== Returns ===== | ||
+ | |||
+ | the IP address | ||
+ | ===== Example ===== | ||
+ | <code cpp> | ||
+ | #include <SPI.h> | ||
+ | #include <Ethernet.h> | ||
+ | |||
+ | // Enter a MAC address for your controller below. | ||
+ | // Newer Ethernet shields have a MAC address printed on a sticker on the shield | ||
+ | byte mac[] = { | ||
+ | 0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02 }; | ||
+ | |||
+ | // 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): | ||
+ | EthernetClient client; | ||
+ | |||
+ | void setup() { | ||
+ | // start the serial library: | ||
+ | Serial.begin(9600); | ||
+ | // start the Ethernet connection: | ||
+ | if (Ethernet.begin(mac) == 0) { | ||
+ | Serial.println("Failed to configure Ethernet using DHCP"); | ||
+ | // no point in carrying on, so do nothing forevermore: | ||
+ | for(;;) | ||
+ | ; | ||
+ | } | ||
+ | // print your local IP address: | ||
+ | Serial.println(Ethernet.localIP()); | ||
+ | |||
+ | } | ||
+ | |||
+ | void loop() { | ||
+ | |||
+ | } | ||
+ | </code> | ||
+ | |||
+ | [[en:arduino:libraries|Reference Home]] |