Brand new to arduino, and picked up an Elecrow Uno-compatible board and a W5200 Ethernet Shield. They got here super fast, but that's where the good news ends.
I have the shield installed and hooked into my WRT54G router via hardline (the same router as my home network). The router is setup to allow DHCP on 192.168.1.100+. The shield does not have an SD card installed. My WAN address is 50.46.154.XXX. None of the various Sketch examples seem to work, though.
Sketch: WebServer
I changed the IP address to IPAddress ip(192, 168, 1, 123); and it prints: server is at 0.0.0.0. If I add code to disable the SD card
pinMode(4, OUTPUT);
digitalWrite(4, HIGH);
then I get: server is at 242.18.154.72
It always reports this address, but I have no idea where it comes from.
Sketch: WebClient
No matter the changes, I always get the output:
Failed to configure Ethernet using DHCP
connecting...
connection faileddisconnecting.
Sketch: User Built Debug
// Test of Arduino using Telnet server.
#include <Ethernet.h>
#include <SPI.h>
// Undefine this to get a working program.
#define TELNET
// the media access control (ethernet hardware) address for the Arduino:
byte mac[] = { 0x90, 0xA2, 0xDA, 0x00, 0x92, 0x34 };
// network configuration - all except mac are optional.
// If the actual values aren't supplied, the default
// is the local_ip with last octet 1.
// void EthernetClass::begin(uint8_t *mac, IPAddress local_ip,
// IPAddress dns_server, IPAddress gateway, IPAddress subnet)
// The default Arduino board address:
byte ip[] = { 192, 168, 1, 123 };
// The DNS server address:
byte dnss[] = { 192, 168, 1, 1 };
// the gateway router address:
byte gateway[] = { 192, 168, 1, 1 };
// the subnet mask:
byte subnet[] = { 255, 255, 255, 0 };
// telnet defaults to port 23
EthernetServer server(23);
void setup()
{
// Initialise the serial device.
Serial.begin(9600);
delay(2000);
Serial.println("setup()");
// Disable SD SPI
// Is this needed ???
pinMode(4, OUTPUT);
digitalWrite(4, HIGH);
// attempt a DHCP connection:
Serial.println("Attempting to get an IP address using DHCP");
// This requires the DHCP server to be x.x.x.1
if (Ethernet.begin(mac) == 0) {
// if DHCP fails, start with a hard-coded address:
Serial.println("failed to get an IP address using DHCP, trying manually");
Ethernet.begin(mac, ip); // function returns void
//Ethernet.begin(mac, ip, gateway, gateway, subnet); // function returns void
}
else
Serial.println("got an IP address using DHCP");
// Start listening for clients.
server.begin();
// Say who we think we are.
Serial.println(Ethernet.localIP());
}
void loop()
{
Serial.println("loop()");
// Initialise the client each pass ???
EthernetClient client = server.available();
// Read bytes from the incoming client and write them back
// to any clients connected to the server.
#ifdef TELNET
if ( client ) {
char c = client.read();
server.write(c);
}
#endif
// Can help debugging.
delay(2000);
}
// eof
This is a bit of code I grabbed from another post. When running it, I get the following output:
setup()
Attempting to get an IP address using DHCP
failed to get an IP address using DHCP, trying manually
205.162.80.154
loop() [repeats]
Again, I have no idea where it's grabbing that IP address from.
I have no idea what to test next. Any thoughts, tips, or help would be greatly appreciated.
