I need to send data from Arduino to a local server that will run on my computer. The computer is connected to Wi-Fi, Arduino Uno with Eternet Shield via a cable to the router.
I took a standard sketch from the WebClient examples and changed my IPv4 address, which I found through ipconfig. This should fix the problem(as I read here), but the port monitor gives "connection failure". What could be the problem?
#include <SPI.h>
#include <Ethernet.h>
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress server(192, 168, 1, 4); // numeric IP for Google (no DNS)
//char server[] = "localhost"; // name address for Google (using DNS)
IPAddress ip(192, 168, 1, 229);
EthernetClient client;
void setup() {
Serial.begin(9600);
Ethernet.init(4);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
// 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:
// try to congifure using IP address instead of DHCP:
Ethernet.begin(mac, ip);
}
// give the Ethernet shield a second to initialize:
delay(1000);
Serial.println("connecting...");
// if you get a connection, report back via serial:
if (client.connect(server, 3000)) {
Serial.println("connected");
// Make a HTTP request:
client.println("GET /search?q=arduino HTTP/1.1");
client.println("Host: localhost");
client.println("Connection: close");
client.println();
}
else {
// kf you didn't get a connection to the server:
Serial.println("connection failed");
}
}
void loop()
{
// if there are incoming bytes available
// from the server, read them and print them:
if (client.available()) {
char c = client.read();
Serial.print(c);
}
// if the server's disconnected, stop the client:
if (!client.connected()) {
Serial.println();
Serial.println("disconnecting.");
client.stop();
// do nothing forevermore:
while (true);
}
}
Should have disabled the Windows Firewall