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/* | |
Web client | |
This sketch connects to a website (http://www.google.com) | |
using an Arduino WIZnet Ethernet shield. | |
Circuit: | |
* Ethernet shield attached to pins 10, 11, 12, 13 | |
created 18 Dec 2009 | |
by David A. Mellis | |
modified 9 Apr 2012 | |
by Tom Igoe, based on work by Adrian McEwen | |
*/ | |
#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[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; | |
// 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) | |
// Set the static IP address to use if the DHCP fails to assign | |
IPAddress ip(192, 168, 0, 177); | |
IPAddress myDns(192, 168, 0, 1); | |
// 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; | |
// Variables to measure the speed | |
unsigned long beginMicros, endMicros; | |
unsigned long byteCount = 0; | |
bool printWebData = true; // set to false for better speed measurement | |
void setup() { | |
Ethernet.init(15); // IOXESP32 Ethernet shield | |
// Open serial communications and wait for port to open: | |
Serial.begin(9600); | |
while (!Serial) { | |
; // wait for serial port to connect. Needed for native USB port only | |
} | |
// start the Ethernet connection: | |
Serial.println("Initialize Ethernet with DHCP:"); | |
if (Ethernet.begin(mac) == 0) { | |
Serial.println("Failed to configure Ethernet using DHCP"); | |
// Check for Ethernet hardware present | |
if (Ethernet.hardwareStatus() == EthernetNoHardware) { | |
Serial.println("Ethernet shield was not found. Sorry, can't run without hardware. :("); | |
while (true) { | |
delay(1); // do nothing, no point running without Ethernet hardware | |
} | |
} | |
if (Ethernet.linkStatus() == LinkOFF) { | |
Serial.println("Ethernet cable is not connected."); | |
} | |
// try to configure using IP address instead of DHCP: | |
Ethernet.begin(mac, ip, myDns); | |
} else { | |
Serial.print(" DHCP assigned IP "); | |
Serial.println(Ethernet.localIP()); | |
} | |
// give the Ethernet shield a second to initialize: | |
delay(1000); | |
Serial.print("connecting to "); | |
Serial.print(server); | |
Serial.println("..."); | |
// if you get a connection, report back via serial: | |
if (client.connect(server, 80)) { | |
Serial.print("connected to "); | |
Serial.println(client.remoteIP()); | |
// 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 { | |
// if you didn't get a connection to the server: | |
Serial.println("connection failed"); | |
} | |
beginMicros = micros(); | |
} | |
void loop() { | |
// if there are incoming bytes available | |
// from the server, read them and print them: | |
int len = client.available(); | |
if (len > 0) { | |
byte buffer[80]; | |
if (len > 80) len = 80; | |
client.read(buffer, len); | |
if (printWebData) { | |
Serial.write(buffer, len); // show in the serial monitor (slows some boards) | |
} | |
byteCount = byteCount + len; | |
} | |
// if the server's disconnected, stop the client: | |
if (!client.connected()) { | |
endMicros = micros(); | |
Serial.println(); | |
Serial.println("disconnecting."); | |
client.stop(); | |
Serial.print("Received "); | |
Serial.print(byteCount); | |
Serial.print(" bytes in "); | |
float seconds = (float)(endMicros - beginMicros) / 1000000.0; | |
Serial.print(seconds, 4); | |
float rate = (float)byteCount / seconds / 1000.0; | |
Serial.print(", rate = "); | |
Serial.print(rate); | |
Serial.print(" kbytes/second"); | |
Serial.println(); | |
// do nothing forevermore: | |
while (true) { | |
delay(1); | |
} | |
} | |
} |
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