Arduino webclient without using router (direct ethernet connection to PC)

Projects Networking, Protocols, and Devices
1

Hello,

I am trying to get some experience with the Ethernet shield, specifically having the shield connected to the laptop rather than router. I need this to be done for my application.

My IPv4 configuration is set to ip(192.168.0.1), subnet(255.255.255.0).

Here is the how the Arduino is configured.

#include <Ethernet.h>
#include <SPI.h>

byte mac[] = { 0x90, 0xA2, 0xDA, 0x0F, 0x56, 0xAE };
byte ip[] = { 192, 168, 0, 2 };

byte server[] = { 64, 233, 187, 99 }; // Google

EthernetClient client;

void setup()
{
  Ethernet.begin(mac, ip);
  
  Serial.begin(9600);
  Serial.print("IP: "); Serial.print('\t'); Serial.println(Ethernet.localIP());
  Serial.print("Gateway: "); Serial.print('\t'); Serial.println(Ethernet.gatewayIP());
  Serial.print("Subnet: "); Serial.print('\t'); Serial.println(Ethernet.subnetMask());
  Serial.print("DNS: "); Serial.print('\t'); Serial.println(Ethernet.dnsServerIP());

  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 (;;)
      ;
  }
}

I am getting a connection failed at the output. I can ping the shield just fine. The W5100 on the shield has autodetect and does not need a cross-over cable (I double checked this).

Output:

IP: 	192.168.0.2
Gateway: 	192.168.0.1
Subnet: 	255.255.255.0
DNS: 	192.168.0.1
connecting...
connection failed

disconnecting.
2

Does it work if you connect the Arduino to the router? Typically, the router address is 192.168.0.1, not some other device on the network.

3

I figured out that I was using the wrong protocol. My application involved UDP.