en:arduino:libraries:clientavailable
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| + | [[en:arduino:libraries:ethernet|Ethernet]] : Client class | ||
| + | ====== available() ====== | ||
| + | |||
| + | ===== Description ===== | ||
| + | |||
| + | Returns the number of bytes available for reading (that is, the amount of data that has been written to the client by the server it is connected to). | ||
| + | available() inherits from the Stream utility class. | ||
| + | ===== Syntax ===== | ||
| + | |||
| + | client.available() | ||
| + | ===== Parameters ===== | ||
| + | |||
| + | none | ||
| + | ===== Returns ===== | ||
| + | |||
| + | The number of bytes available. | ||
| + | ===== Example ===== | ||
| + | <code cpp> | ||
| + | #include <Ethernet.h> | ||
| + | #include <SPI.h> | ||
| + | |||
| + | byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; | ||
| + | byte ip[] = { 10, 0, 0, 177 }; | ||
| + | byte server[] = { 64, 233, 187, 99 }; // Google | ||
| + | |||
| + | EthernetClient client; | ||
| + | |||
| + | void setup() | ||
| + | { | ||
| + | Ethernet.begin(mac, ip); | ||
| + | Serial.begin(9600); | ||
| + | |||
| + | delay(1000); | ||
| + | |||
| + | Serial.println("connecting..."); | ||
| + | |||
| + | if (client.connect(server, 80)) { | ||
| + | Serial.println("connected"); | ||
| + | client.println("GET /search?q=arduino HTTP/1.0"); | ||
| + | client.println(); | ||
| + | } else { | ||
| + | Serial.println("connection failed"); | ||
| + | } | ||
| + | } | ||
| + | |||
| + | void loop() | ||
| + | { | ||
| + | if (client.available()) { | ||
| + | char c = client.read(); | ||
| + | Serial.print(c); | ||
| + | } | ||
| + | |||
| + | if (!client.connected()) { | ||
| + | Serial.println(); | ||
| + | Serial.println("disconnecting."); | ||
| + | client.stop(); | ||
| + | for(;;) | ||
| + | ; | ||
| + | } | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | [[en:arduino:libraries|Reference Home]] | ||
en/arduino/libraries/clientavailable.txt · 最后更改: 2016/12/25 22:15 (外部编辑)
